/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 09:11:31,735 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 09:11:31,737 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 09:11:31,774 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 09:11:31,775 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 09:11:31,777 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 09:11:31,781 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 09:11:31,783 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 09:11:31,784 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 09:11:31,788 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 09:11:31,790 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 09:11:31,791 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 09:11:31,791 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 09:11:31,794 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 09:11:31,795 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 09:11:31,796 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 09:11:31,797 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 09:11:31,797 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 09:11:31,799 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 09:11:31,803 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 09:11:31,805 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 09:11:31,806 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 09:11:31,807 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 09:11:31,808 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 09:11:31,811 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 09:11:31,811 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 09:11:31,811 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 09:11:31,812 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 09:11:31,812 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 09:11:31,814 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 09:11:31,814 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 09:11:31,815 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 09:11:31,816 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 09:11:31,817 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 09:11:31,818 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 09:11:31,818 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 09:11:31,818 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 09:11:31,818 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 09:11:31,819 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 09:11:31,819 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 09:11:31,820 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 09:11:31,821 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 09:11:31,849 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 09:11:31,850 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 09:11:31,850 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 09:11:31,850 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 09:11:31,851 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 09:11:31,851 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 09:11:31,851 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 09:11:31,851 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 09:11:31,851 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 09:11:31,852 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 09:11:31,852 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 09:11:31,852 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 09:11:31,852 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 09:11:31,853 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 09:11:31,853 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 09:11:31,853 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 09:11:31,853 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 09:11:31,853 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 09:11:31,853 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 09:11:31,854 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 09:11:31,854 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 09:11:31,854 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 09:11:31,854 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 09:11:31,854 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 09:11:31,854 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 09:11:31,855 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 09:11:31,855 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 09:11:31,855 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 09:11:31,855 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 09:11:31,855 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 09:11:31,855 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 09:11:31,855 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 09:11:31,856 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:11:31,856 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 09:11:31,856 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 09:11:31,856 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 09:11:31,856 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 09:11:31,856 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 09:11:31,856 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 09:11:31,856 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 09:11:31,856 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 09:11:31,857 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 09:11:32,090 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 09:11:32,111 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 09:11:32,113 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 09:11:32,114 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 09:11:32,115 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 09:11:32,116 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c [2023-04-01 09:11:33,200 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 09:11:33,408 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 09:11:33,409 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c [2023-04-01 09:11:33,422 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e08b4bb7/9a9b2e83462a4e6c9ac7237d69c2d343/FLAG203967768 [2023-04-01 09:11:33,434 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e08b4bb7/9a9b2e83462a4e6c9ac7237d69c2d343 [2023-04-01 09:11:33,442 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 09:11:33,443 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 09:11:33,446 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 09:11:33,446 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 09:11:33,448 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 09:11:33,449 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:11:33" (1/1) ... [2023-04-01 09:11:33,450 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a6c1d13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:11:33, skipping insertion in model container [2023-04-01 09:11:33,450 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:11:33" (1/1) ... [2023-04-01 09:11:33,457 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 09:11:33,495 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 09:11:33,637 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_4-2a.c.cil.c[755,768] [2023-04-01 09:11:33,677 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:11:33,688 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 09:11:33,696 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_4-2a.c.cil.c[755,768] [2023-04-01 09:11:33,724 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:11:33,739 INFO L208 MainTranslator]: Completed translation [2023-04-01 09:11:33,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:11:33 WrapperNode [2023-04-01 09:11:33,740 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 09:11:33,741 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 09:11:33,741 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 09:11:33,741 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 09:11:33,749 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:11:33" (1/1) ... [2023-04-01 09:11:33,749 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:11:33" (1/1) ... [2023-04-01 09:11:33,756 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:11:33" (1/1) ... [2023-04-01 09:11:33,756 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:11:33" (1/1) ... [2023-04-01 09:11:33,777 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:11:33" (1/1) ... [2023-04-01 09:11:33,782 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:11:33" (1/1) ... [2023-04-01 09:11:33,784 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:11:33" (1/1) ... [2023-04-01 09:11:33,785 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:11:33" (1/1) ... [2023-04-01 09:11:33,788 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 09:11:33,789 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 09:11:33,789 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 09:11:33,789 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 09:11:33,790 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:11:33" (1/1) ... [2023-04-01 09:11:33,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:11:33,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:11:33,827 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 09:11:33,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 09:11:33,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 09:11:33,863 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 09:11:33,863 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 09:11:33,867 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 09:11:33,868 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2023-04-01 09:11:33,868 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2023-04-01 09:11:33,868 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2023-04-01 09:11:33,868 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 09:11:33,868 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 09:11:33,868 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 09:11:33,869 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 09:11:33,869 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 09:11:33,869 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 09:11:33,869 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2023-04-01 09:11:33,869 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 09:11:33,870 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2023-04-01 09:11:33,870 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2023-04-01 09:11:33,870 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2023-04-01 09:11:33,870 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 09:11:33,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 09:11:33,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 09:11:33,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 09:11:33,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 09:11:33,870 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 09:11:33,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 09:11:33,931 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 09:11:33,932 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 09:11:34,338 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 09:11:34,647 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 09:11:34,647 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 09:11:34,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:11:34 BoogieIcfgContainer [2023-04-01 09:11:34,650 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 09:11:34,652 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 09:11:34,652 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 09:11:34,655 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 09:11:34,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 09:11:33" (1/3) ... [2023-04-01 09:11:34,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74e003c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:11:34, skipping insertion in model container [2023-04-01 09:11:34,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:11:33" (2/3) ... [2023-04-01 09:11:34,656 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74e003c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:11:34, skipping insertion in model container [2023-04-01 09:11:34,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:11:34" (3/3) ... [2023-04-01 09:11:34,657 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_4-2a.c.cil.c [2023-04-01 09:11:34,671 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 09:11:34,671 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 09:11:34,724 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 09:11:34,729 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;@14d09663, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 09:11:34,730 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 09:11:34,733 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 35 states have (on average 1.4) internal successors, (49), 36 states have internal predecessors, (49), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 09:11:34,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-01 09:11:34,741 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:11:34,742 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:11:34,743 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:11:34,748 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:11:34,748 INFO L85 PathProgramCache]: Analyzing trace with hash -2009001840, now seen corresponding path program 1 times [2023-04-01 09:11:34,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:11:34,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918296603] [2023-04-01 09:11:34,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:11:34,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:11:34,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:11:35,420 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 09:11:35,421 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:11:35,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918296603] [2023-04-01 09:11:35,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918296603] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:11:35,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:11:35,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-04-01 09:11:35,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468922989] [2023-04-01 09:11:35,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:11:35,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 09:11:35,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:11:35,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 09:11:35,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-04-01 09:11:35,467 INFO L87 Difference]: Start difference. First operand has 54 states, 35 states have (on average 1.4) internal successors, (49), 36 states have internal predecessors, (49), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 10 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 09:11:35,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:11:35,689 INFO L93 Difference]: Finished difference Result 116 states and 174 transitions. [2023-04-01 09:11:35,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 09:11:35,691 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2023-04-01 09:11:35,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:11:35,698 INFO L225 Difference]: With dead ends: 116 [2023-04-01 09:11:35,698 INFO L226 Difference]: Without dead ends: 65 [2023-04-01 09:11:35,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-04-01 09:11:35,704 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 16 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 09:11:35,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 356 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 09:11:35,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-04-01 09:11:35,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 57. [2023-04-01 09:11:35,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 39 states have internal predecessors, (48), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) [2023-04-01 09:11:35,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 76 transitions. [2023-04-01 09:11:35,746 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 76 transitions. Word has length 30 [2023-04-01 09:11:35,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:11:35,747 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 76 transitions. [2023-04-01 09:11:35,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 09:11:35,748 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 76 transitions. [2023-04-01 09:11:35,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-01 09:11:35,751 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:11:35,751 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-04-01 09:11:35,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 09:11:35,751 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:11:35,752 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:11:35,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1803256769, now seen corresponding path program 1 times [2023-04-01 09:11:35,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:11:35,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998208095] [2023-04-01 09:11:35,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:11:35,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:11:35,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:11:36,139 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 09:11:36,140 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:11:36,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998208095] [2023-04-01 09:11:36,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998208095] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:11:36,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835586011] [2023-04-01 09:11:36,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:11:36,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:11:36,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:11:36,147 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:11:36,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 09:11:36,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:11:36,222 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-01 09:11:36,227 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:11:36,366 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 09:11:36,366 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:11:36,626 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 09:11:36,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835586011] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:11:36,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1536341897] [2023-04-01 09:11:36,675 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2023-04-01 09:11:36,676 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:11:36,681 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:11:36,686 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:11:36,691 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:11:36,837 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 09:11:38,473 INFO L197 IcfgInterpreter]: Interpreting procedure addflt with input of size 63 for LOIs [2023-04-01 09:11:38,587 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-01 09:11:42,214 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 98 for LOIs [2023-04-01 09:11:42,218 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 49 for LOIs [2023-04-01 09:11:42,359 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 09:11:42,363 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:11:46,784 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '537#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 09:11:46,784 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:11:46,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 09:11:46,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 8] total 21 [2023-04-01 09:11:46,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409517394] [2023-04-01 09:11:46,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 09:11:46,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-01 09:11:46,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:11:46,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-01 09:11:46,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1588, Unknown=0, NotChecked=0, Total=1722 [2023-04-01 09:11:46,788 INFO L87 Difference]: Start difference. First operand 57 states and 76 transitions. Second operand has 21 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 5 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 6 states have call predecessors, (8), 3 states have call successors, (8) [2023-04-01 09:11:47,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:11:47,352 INFO L93 Difference]: Finished difference Result 150 states and 207 transitions. [2023-04-01 09:11:47,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-01 09:11:47,353 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 5 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 6 states have call predecessors, (8), 3 states have call successors, (8) Word has length 34 [2023-04-01 09:11:47,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:11:47,355 INFO L225 Difference]: With dead ends: 150 [2023-04-01 09:11:47,355 INFO L226 Difference]: Without dead ends: 99 [2023-04-01 09:11:47,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 69 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=207, Invalid=2549, Unknown=0, NotChecked=0, Total=2756 [2023-04-01 09:11:47,358 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 41 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 09:11:47,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 515 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 09:11:47,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-04-01 09:11:47,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 71. [2023-04-01 09:11:47,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 49 states have internal predecessors, (58), 14 states have call successors, (14), 9 states have call predecessors, (14), 9 states have return successors, (18), 12 states have call predecessors, (18), 12 states have call successors, (18) [2023-04-01 09:11:47,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 90 transitions. [2023-04-01 09:11:47,370 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 90 transitions. Word has length 34 [2023-04-01 09:11:47,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:11:47,370 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 90 transitions. [2023-04-01 09:11:47,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 5 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 6 states have call predecessors, (8), 3 states have call successors, (8) [2023-04-01 09:11:47,371 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 90 transitions. [2023-04-01 09:11:47,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-01 09:11:47,372 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:11:47,372 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-04-01 09:11:47,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 09:11:47,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:11:47,580 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:11:47,581 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:11:47,581 INFO L85 PathProgramCache]: Analyzing trace with hash 210122241, now seen corresponding path program 2 times [2023-04-01 09:11:47,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:11:47,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601080986] [2023-04-01 09:11:47,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:11:47,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:11:47,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:11:47,834 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 09:11:47,835 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:11:47,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601080986] [2023-04-01 09:11:47,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601080986] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:11:47,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:11:47,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-01 09:11:47,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095730573] [2023-04-01 09:11:47,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:11:47,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 09:11:47,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:11:47,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 09:11:47,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-01 09:11:47,838 INFO L87 Difference]: Start difference. First operand 71 states and 90 transitions. Second operand has 8 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-01 09:11:47,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:11:47,948 INFO L93 Difference]: Finished difference Result 102 states and 129 transitions. [2023-04-01 09:11:47,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 09:11:47,948 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 34 [2023-04-01 09:11:47,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:11:47,949 INFO L225 Difference]: With dead ends: 102 [2023-04-01 09:11:47,949 INFO L226 Difference]: Without dead ends: 81 [2023-04-01 09:11:47,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-04-01 09:11:47,951 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 8 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 09:11:47,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 304 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 09:11:47,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-04-01 09:11:47,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 71. [2023-04-01 09:11:47,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 49 states have internal predecessors, (58), 14 states have call successors, (14), 9 states have call predecessors, (14), 9 states have return successors, (18), 12 states have call predecessors, (18), 12 states have call successors, (18) [2023-04-01 09:11:47,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 90 transitions. [2023-04-01 09:11:47,963 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 90 transitions. Word has length 34 [2023-04-01 09:11:47,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:11:47,963 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 90 transitions. [2023-04-01 09:11:47,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-01 09:11:47,963 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 90 transitions. [2023-04-01 09:11:47,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-04-01 09:11:47,967 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:11:47,967 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-04-01 09:11:47,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 09:11:47,968 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:11:47,968 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:11:47,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1981653681, now seen corresponding path program 1 times [2023-04-01 09:11:47,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:11:47,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239298890] [2023-04-01 09:11:47,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:11:47,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:11:47,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:11:48,515 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 09:11:48,515 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:11:48,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239298890] [2023-04-01 09:11:48,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239298890] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:11:48,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371423616] [2023-04-01 09:11:48,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:11:48,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:11:48,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:11:48,517 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:11:48,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 09:11:48,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:11:48,581 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 54 conjunts are in the unsatisfiable core [2023-04-01 09:11:48,585 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:11:48,843 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 09:11:48,843 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:11:50,060 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 09:11:50,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371423616] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 09:11:50,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:11:50,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [20, 19] total 33 [2023-04-01 09:11:50,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135587952] [2023-04-01 09:11:50,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:11:50,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 09:11:50,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:11:50,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 09:11:50,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=970, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 09:11:50,063 INFO L87 Difference]: Start difference. First operand 71 states and 90 transitions. Second operand has 11 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-01 09:11:50,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:11:50,501 INFO L93 Difference]: Finished difference Result 85 states and 106 transitions. [2023-04-01 09:11:50,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 09:11:50,502 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2023-04-01 09:11:50,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:11:50,503 INFO L225 Difference]: With dead ends: 85 [2023-04-01 09:11:50,503 INFO L226 Difference]: Without dead ends: 65 [2023-04-01 09:11:50,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2023-04-01 09:11:50,505 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 19 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 09:11:50,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 399 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 09:11:50,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-04-01 09:11:50,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2023-04-01 09:11:50,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 44 states have internal predecessors, (52), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (17), 11 states have call predecessors, (17), 11 states have call successors, (17) [2023-04-01 09:11:50,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 82 transitions. [2023-04-01 09:11:50,514 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 82 transitions. Word has length 39 [2023-04-01 09:11:50,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:11:50,515 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 82 transitions. [2023-04-01 09:11:50,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-01 09:11:50,515 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 82 transitions. [2023-04-01 09:11:50,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-01 09:11:50,516 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:11:50,516 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 09:11:50,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 09:11:50,722 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,SelfDestructingSolverStorable3 [2023-04-01 09:11:50,723 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:11:50,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:11:50,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1423870130, now seen corresponding path program 3 times [2023-04-01 09:11:50,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:11:50,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590377844] [2023-04-01 09:11:50,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:11:50,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:11:50,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:11:51,165 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 09:11:51,165 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:11:51,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590377844] [2023-04-01 09:11:51,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590377844] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:11:51,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:11:51,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-04-01 09:11:51,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641058577] [2023-04-01 09:11:51,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:11:51,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 09:11:51,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:11:51,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 09:11:51,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2023-04-01 09:11:51,167 INFO L87 Difference]: Start difference. First operand 63 states and 82 transitions. Second operand has 13 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 09:11:51,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:11:51,469 INFO L93 Difference]: Finished difference Result 106 states and 146 transitions. [2023-04-01 09:11:51,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 09:11:51,470 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2023-04-01 09:11:51,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:11:51,471 INFO L225 Difference]: With dead ends: 106 [2023-04-01 09:11:51,471 INFO L226 Difference]: Without dead ends: 104 [2023-04-01 09:11:51,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2023-04-01 09:11:51,474 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 41 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 09:11:51,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 652 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 09:11:51,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-04-01 09:11:51,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 90. [2023-04-01 09:11:51,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 58 states have (on average 1.2586206896551724) internal successors, (73), 63 states have internal predecessors, (73), 19 states have call successors, (19), 9 states have call predecessors, (19), 12 states have return successors, (31), 17 states have call predecessors, (31), 17 states have call successors, (31) [2023-04-01 09:11:51,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 123 transitions. [2023-04-01 09:11:51,495 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 123 transitions. Word has length 38 [2023-04-01 09:11:51,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:11:51,495 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 123 transitions. [2023-04-01 09:11:51,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 09:11:51,495 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 123 transitions. [2023-04-01 09:11:51,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-01 09:11:51,500 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:11:51,500 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 09:11:51,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 09:11:51,501 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:11:51,501 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:11:51,501 INFO L85 PathProgramCache]: Analyzing trace with hash 2102212570, now seen corresponding path program 1 times [2023-04-01 09:11:51,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:11:51,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579253518] [2023-04-01 09:11:51,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:11:51,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:11:51,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-01 09:11:51,574 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-04-01 09:11:51,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-01 09:11:51,623 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-04-01 09:11:51,624 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-04-01 09:11:51,625 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-01 09:11:51,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 09:11:51,631 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1] [2023-04-01 09:11:51,634 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-04-01 09:11:51,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.04 09:11:51 BoogieIcfgContainer [2023-04-01 09:11:51,681 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-04-01 09:11:51,681 INFO L158 Benchmark]: Toolchain (without parser) took 18238.48ms. Allocated memory was 231.7MB in the beginning and 750.8MB in the end (delta: 519.0MB). Free memory was 191.0MB in the beginning and 501.6MB in the end (delta: -310.6MB). Peak memory consumption was 209.5MB. Max. memory is 8.0GB. [2023-04-01 09:11:51,681 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 192.9MB. Free memory is still 138.1MB. There was no memory consumed. Max. memory is 8.0GB. [2023-04-01 09:11:51,682 INFO L158 Benchmark]: CACSL2BoogieTranslator took 294.45ms. Allocated memory is still 231.7MB. Free memory was 191.0MB in the beginning and 177.9MB in the end (delta: 13.1MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2023-04-01 09:11:51,682 INFO L158 Benchmark]: Boogie Preprocessor took 47.01ms. Allocated memory is still 231.7MB. Free memory was 177.9MB in the beginning and 175.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-04-01 09:11:51,682 INFO L158 Benchmark]: RCFGBuilder took 861.25ms. Allocated memory is still 231.7MB. Free memory was 175.8MB in the beginning and 193.5MB in the end (delta: -17.7MB). Peak memory consumption was 58.3MB. Max. memory is 8.0GB. [2023-04-01 09:11:51,682 INFO L158 Benchmark]: TraceAbstraction took 17028.72ms. Allocated memory was 231.7MB in the beginning and 750.8MB in the end (delta: 519.0MB). Free memory was 192.5MB in the beginning and 501.6MB in the end (delta: -309.2MB). Peak memory consumption was 209.9MB. Max. memory is 8.0GB. [2023-04-01 09:11:51,684 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 192.9MB. Free memory is still 138.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 294.45ms. Allocated memory is still 231.7MB. Free memory was 191.0MB in the beginning and 177.9MB in the end (delta: 13.1MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 47.01ms. Allocated memory is still 231.7MB. Free memory was 177.9MB in the beginning and 175.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 861.25ms. Allocated memory is still 231.7MB. Free memory was 175.8MB in the beginning and 193.5MB in the end (delta: -17.7MB). Peak memory consumption was 58.3MB. Max. memory is 8.0GB. * TraceAbstraction took 17028.72ms. Allocated memory was 231.7MB in the beginning and 750.8MB in the end (delta: 519.0MB). Free memory was 192.5MB in the beginning and 501.6MB in the end (delta: -309.2MB). Peak memory consumption was 209.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 18]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 111, overapproximation of bitwiseAnd at line 77. Possible FailurePath: [L227] unsigned int a ; [L228] unsigned int ma = __VERIFIER_nondet_uint(); [L229] signed char ea = __VERIFIER_nondet_char(); [L230] unsigned int b ; [L231] unsigned int mb = __VERIFIER_nondet_uint(); [L232] signed char eb = __VERIFIER_nondet_char(); [L233] unsigned int r_add1 ; [L234] unsigned int r_add2 ; [L235] unsigned int zero ; [L236] int tmp ; [L237] int tmp___0 ; [L238] int __retres14 ; VAL [ea=127, eb=127, ma=33554432] [L242] CALL, EXPR base2flt(0, 0) VAL [\old(e)=0, \old(m)=0] [L26] unsigned int res ; [L27] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=0, e=0, m=0] [L30] COND TRUE ! m [L31] __retres4 = 0U VAL [\old(e)=0, \old(m)=0, __retres4=0, e=0, m=0] [L81] return (__retres4); [L242] RET, EXPR base2flt(0, 0) VAL [base2flt(0, 0)=0, ea=127, eb=127, ma=33554432] [L242] zero = base2flt(0, 0) [L243] CALL, EXPR base2flt(ma, ea) VAL [\old(e)=127, \old(m)=33554432] [L26] unsigned int res ; [L27] unsigned int __retres4 ; VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L30] COND FALSE !(! m) VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L36] COND FALSE !(m < 1U << 24U) VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L58] COND TRUE 1 VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L60] COND TRUE m >= 1U << 25U VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L65] COND TRUE e >= 127 [L66] __retres4 = 4294967295U VAL [\old(e)=127, \old(m)=33554432, __retres4=4294967295, e=127, m=33554432] [L81] return (__retres4); [L243] RET, EXPR base2flt(ma, ea) VAL [base2flt(ma, ea)=4294967295, ea=127, eb=127, ma=33554432, zero=0] [L243] a = base2flt(ma, ea) [L244] CALL, EXPR base2flt(mb, eb) VAL [\old(e)=127, \old(m)=16777216] [L26] unsigned int res ; [L27] unsigned int __retres4 ; VAL [\old(e)=127, \old(m)=16777216, e=127, m=16777216] [L30] COND FALSE !(! m) VAL [\old(e)=127, \old(m)=16777216, e=127, m=16777216] [L36] COND FALSE !(m < 1U << 24U) VAL [\old(e)=127, \old(m)=16777216, e=127, m=16777216] [L58] COND TRUE 1 VAL [\old(e)=127, \old(m)=16777216, e=127, m=16777216] [L60] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=127, \old(m)=16777216, e=127, m=16777216] [L77] EXPR m & ~ (1U << 24U) [L77] m = m & ~ (1U << 24U) [L78] EXPR m | ((unsigned int )(e + 128) << 24U) [L78] res = m | ((unsigned int )(e + 128) << 24U) [L79] __retres4 = res VAL [\old(e)=127, \old(m)=16777216, __retres4=4278190080, e=127, m=1, res=4278190080] [L81] return (__retres4); [L244] RET, EXPR base2flt(mb, eb) VAL [a=4294967295, base2flt(mb, eb)=-36028797035741184, ea=127, eb=127, ma=33554432, mb=16777216, zero=0] [L244] b = base2flt(mb, eb) [L245] CALL addflt(a, b) VAL [\old(a)=4294967295, \old(b)=4278190080] [L85] unsigned int res ; [L86] unsigned int ma ; [L87] unsigned int mb ; [L88] unsigned int delta ; [L89] int ea ; [L90] int eb ; [L91] unsigned int tmp ; [L92] unsigned int __retres10 ; [L95] COND FALSE !(a < b) VAL [\old(a)=4294967295, \old(b)=4278190080, a=4294967295, b=4278190080, tmp=4294967295] [L102] COND FALSE !(! b) [L109] ma = a & ((1U << 24U) - 1U) [L110] ea = (int )(a >> 24U) - 128 [L111] EXPR ma | (1U << 24U) [L111] ma = ma | (1U << 24U) [L112] mb = b & ((1U << 24U) - 1U) [L113] eb = (int )(b >> 24U) - 128 [L114] EXPR mb | (1U << 24U) [L114] mb = mb | (1U << 24U) [L115] CALL __VERIFIER_assert(ea >= eb) VAL [\old(cond)=0] [L17] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L18] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 8 procedures, 64 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 16.9s, OverallIterations: 6, TraceHistogramMax: 3, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 149 SdHoareTripleChecker+Valid, 1.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 125 mSDsluCounter, 2226 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1974 mSDsCounter, 31 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1407 IncrementalHoareTripleChecker+Invalid, 1438 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 31 mSolverCounterUnsat, 252 mSDtfsCounter, 1407 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 271 GetRequests, 146 SyntacticMatches, 5 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 928 ImplicationChecksByTransitivity, 5.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=90occurred in iteration=5, InterpolantAutomatonStates: 68, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 62 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.9s InterpolantComputationTime, 286 NumberOfCodeBlocks, 286 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 312 ConstructedInterpolants, 0 QuantifiedInterpolants, 1295 SizeOfPredicates, 26 NumberOfNonLiveVariables, 278 ConjunctsInSsa, 71 ConjunctsInUnsatCore, 9 InterpolantComputations, 4 PerfectInterpolantSequences, 103/124 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-04-01 09:11:51,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...