/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/eca-rers2012/Problem15_label10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 10:15:40,636 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 10:15:40,638 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 10:15:40,673 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 10:15:40,674 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 10:15:40,676 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 10:15:40,679 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 10:15:40,681 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 10:15:40,682 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 10:15:40,687 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 10:15:40,688 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 10:15:40,690 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 10:15:40,690 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 10:15:40,693 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 10:15:40,693 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 10:15:40,695 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 10:15:40,695 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 10:15:40,696 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 10:15:40,697 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 10:15:40,701 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 10:15:40,702 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 10:15:40,703 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 10:15:40,704 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 10:15:40,705 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 10:15:40,714 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 10:15:40,715 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 10:15:40,715 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 10:15:40,716 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 10:15:40,716 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 10:15:40,717 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 10:15:40,717 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 10:15:40,718 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 10:15:40,718 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 10:15:40,719 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 10:15:40,719 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 10:15:40,720 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 10:15:40,720 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 10:15:40,720 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 10:15:40,721 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 10:15:40,721 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 10:15:40,722 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 10:15:40,726 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 10:15:40,745 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 10:15:40,745 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 10:15:40,745 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 10:15:40,745 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 10:15:40,746 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 10:15:40,746 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 10:15:40,746 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 10:15:40,747 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 10:15:40,747 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 10:15:40,747 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 10:15:40,747 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 10:15:40,747 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 10:15:40,748 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 10:15:40,748 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 10:15:40,748 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 10:15:40,748 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 10:15:40,751 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 10:15:40,751 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 10:15:40,752 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 10:15:40,752 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 10:15:40,752 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 10:15:40,752 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 10:15:40,753 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 10:15:40,753 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 10:15:40,753 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 10:15:40,753 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 10:15:40,753 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 10:15:40,753 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 10:15:40,754 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 10:15:40,754 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 10:15:40,754 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 10:15:40,754 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 10:15:40,754 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:15:40,754 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 10:15:40,754 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 10:15:40,754 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 10:15:40,755 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 10:15:40,755 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 10:15:40,755 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 10:15:40,755 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 10:15:40,755 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 10:15:40,755 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 10:15:40,997 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 10:15:41,023 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 10:15:41,026 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 10:15:41,027 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 10:15:41,027 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 10:15:41,028 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label10.c [2023-04-01 10:15:42,271 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 10:15:42,593 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 10:15:42,593 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label10.c [2023-04-01 10:15:42,611 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f05b5c1cb/6fb920490af946d0b5ef32c904c548d3/FLAG31d2dbe44 [2023-04-01 10:15:42,627 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f05b5c1cb/6fb920490af946d0b5ef32c904c548d3 [2023-04-01 10:15:42,630 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 10:15:42,631 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 10:15:42,635 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 10:15:42,635 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 10:15:42,638 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 10:15:42,638 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:15:42" (1/1) ... [2023-04-01 10:15:42,640 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fe1a174 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:15:42, skipping insertion in model container [2023-04-01 10:15:42,640 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:15:42" (1/1) ... [2023-04-01 10:15:42,646 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 10:15:42,701 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 10:15:42,869 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/eca-rers2012/Problem15_label10.c[4275,4288] [2023-04-01 10:15:43,327 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:15:43,338 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 10:15:43,367 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/eca-rers2012/Problem15_label10.c[4275,4288] [2023-04-01 10:15:43,569 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:15:43,583 INFO L208 MainTranslator]: Completed translation [2023-04-01 10:15:43,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:15:43 WrapperNode [2023-04-01 10:15:43,584 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 10:15:43,585 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 10:15:43,585 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 10:15:43,585 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 10:15:43,595 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:15:43" (1/1) ... [2023-04-01 10:15:43,595 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:15:43" (1/1) ... [2023-04-01 10:15:43,637 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:15:43" (1/1) ... [2023-04-01 10:15:43,638 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:15:43" (1/1) ... [2023-04-01 10:15:43,690 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:15:43" (1/1) ... [2023-04-01 10:15:43,713 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:15:43" (1/1) ... [2023-04-01 10:15:43,738 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:15:43" (1/1) ... [2023-04-01 10:15:43,747 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:15:43" (1/1) ... [2023-04-01 10:15:43,764 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 10:15:43,765 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 10:15:43,766 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 10:15:43,766 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 10:15:43,767 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:15:43" (1/1) ... [2023-04-01 10:15:43,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:15:43,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:15:43,798 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 10:15:43,809 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 10:15:43,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 10:15:43,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 10:15:43,833 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 10:15:43,833 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 10:15:43,834 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 10:15:43,834 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 10:15:43,834 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 10:15:43,834 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 10:15:43,834 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 10:15:43,834 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 10:15:43,834 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 10:15:43,834 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 10:15:43,835 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 10:15:43,835 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 10:15:43,835 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 10:15:43,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 10:15:43,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 10:15:43,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 10:15:43,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 10:15:43,835 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 10:15:43,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 10:15:43,895 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 10:15:43,897 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 10:15:46,077 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 10:15:46,743 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 10:15:46,743 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 10:15:46,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:15:46 BoogieIcfgContainer [2023-04-01 10:15:46,747 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 10:15:46,750 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 10:15:46,750 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 10:15:46,752 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 10:15:46,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:15:42" (1/3) ... [2023-04-01 10:15:46,753 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9182686 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:15:46, skipping insertion in model container [2023-04-01 10:15:46,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:15:43" (2/3) ... [2023-04-01 10:15:46,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9182686 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:15:46, skipping insertion in model container [2023-04-01 10:15:46,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:15:46" (3/3) ... [2023-04-01 10:15:46,755 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label10.c [2023-04-01 10:15:46,772 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 10:15:46,772 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 10:15:46,866 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 10:15:46,873 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;@11b0e64a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 10:15:46,873 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 10:15:46,880 INFO L276 IsEmpty]: Start isEmpty. Operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 10:15:46,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 10:15:46,886 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:15:46,887 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:15:46,887 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:15:46,893 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:15:46,893 INFO L85 PathProgramCache]: Analyzing trace with hash 271516867, now seen corresponding path program 1 times [2023-04-01 10:15:46,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:15:46,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009761842] [2023-04-01 10:15:46,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:15:46,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:15:47,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:15:47,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:15:47,224 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:15:47,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009761842] [2023-04-01 10:15:47,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009761842] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:15:47,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:15:47,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:15:47,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772908980] [2023-04-01 10:15:47,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:15:47,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:15:47,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:15:47,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:15:47,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:15:47,264 INFO L87 Difference]: Start difference. First operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:15:49,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:15:49,847 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2023-04-01 10:15:49,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:15:49,850 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 10:15:49,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:15:49,862 INFO L225 Difference]: With dead ends: 718 [2023-04-01 10:15:49,862 INFO L226 Difference]: Without dead ends: 471 [2023-04-01 10:15:49,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:15:49,872 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 235 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-04-01 10:15:49,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 110 Invalid, 957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-04-01 10:15:49,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-04-01 10:15:49,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 469. [2023-04-01 10:15:49,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 459 states have (on average 1.7712418300653594) internal successors, (813), 459 states have internal predecessors, (813), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-01 10:15:49,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 824 transitions. [2023-04-01 10:15:49,969 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 824 transitions. Word has length 11 [2023-04-01 10:15:49,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:15:49,970 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 824 transitions. [2023-04-01 10:15:49,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:15:49,971 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 824 transitions. [2023-04-01 10:15:49,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 10:15:49,973 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:15:49,973 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:15:49,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 10:15:49,973 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:15:49,974 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:15:49,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1643216222, now seen corresponding path program 1 times [2023-04-01 10:15:49,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:15:49,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205840108] [2023-04-01 10:15:49,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:15:49,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:15:50,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:15:50,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:15:50,151 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:15:50,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205840108] [2023-04-01 10:15:50,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205840108] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:15:50,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:15:50,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:15:50,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46242091] [2023-04-01 10:15:50,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:15:50,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:15:50,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:15:50,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:15:50,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:15:50,154 INFO L87 Difference]: Start difference. First operand 469 states and 824 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:15:52,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:15:52,612 INFO L93 Difference]: Finished difference Result 1421 states and 2520 transitions. [2023-04-01 10:15:52,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 10:15:52,613 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2023-04-01 10:15:52,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:15:52,623 INFO L225 Difference]: With dead ends: 1421 [2023-04-01 10:15:52,624 INFO L226 Difference]: Without dead ends: 957 [2023-04-01 10:15:52,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:15:52,629 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 746 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1416 mSolverCounterSat, 326 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 326 IncrementalHoareTripleChecker+Valid, 1416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-04-01 10:15:52,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [746 Valid, 48 Invalid, 1742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [326 Valid, 1416 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-04-01 10:15:52,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2023-04-01 10:15:52,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 932. [2023-04-01 10:15:52,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 912 states have (on average 1.4923245614035088) internal successors, (1361), 916 states have internal predecessors, (1361), 8 states have call successors, (8), 8 states have call predecessors, (8), 11 states have return successors, (27), 7 states have call predecessors, (27), 7 states have call successors, (27) [2023-04-01 10:15:52,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1396 transitions. [2023-04-01 10:15:52,676 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1396 transitions. Word has length 23 [2023-04-01 10:15:52,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:15:52,677 INFO L495 AbstractCegarLoop]: Abstraction has 932 states and 1396 transitions. [2023-04-01 10:15:52,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:15:52,677 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1396 transitions. [2023-04-01 10:15:52,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-01 10:15:52,678 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:15:52,679 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 10:15:52,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 10:15:52,679 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:15:52,679 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:15:52,680 INFO L85 PathProgramCache]: Analyzing trace with hash 567821186, now seen corresponding path program 1 times [2023-04-01 10:15:52,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:15:52,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242366766] [2023-04-01 10:15:52,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:15:52,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:15:52,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:15:52,906 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:15:52,906 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:15:52,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242366766] [2023-04-01 10:15:52,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242366766] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:15:52,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:15:52,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:15:52,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147986222] [2023-04-01 10:15:52,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:15:52,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:15:52,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:15:52,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:15:52,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:15:52,913 INFO L87 Difference]: Start difference. First operand 932 states and 1396 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:15:55,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:15:55,268 INFO L93 Difference]: Finished difference Result 2838 states and 4328 transitions. [2023-04-01 10:15:55,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 10:15:55,269 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2023-04-01 10:15:55,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:15:55,279 INFO L225 Difference]: With dead ends: 2838 [2023-04-01 10:15:55,279 INFO L226 Difference]: Without dead ends: 1911 [2023-04-01 10:15:55,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:15:55,284 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 820 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1205 mSolverCounterSat, 469 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 820 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 469 IncrementalHoareTripleChecker+Valid, 1205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-04-01 10:15:55,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [820 Valid, 47 Invalid, 1674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [469 Valid, 1205 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-04-01 10:15:55,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1911 states. [2023-04-01 10:15:55,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1911 to 1660. [2023-04-01 10:15:55,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1660 states, 1613 states have (on average 1.3415995040297581) internal successors, (2164), 1634 states have internal predecessors, (2164), 13 states have call successors, (13), 13 states have call predecessors, (13), 33 states have return successors, (74), 12 states have call predecessors, (74), 12 states have call successors, (74) [2023-04-01 10:15:55,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1660 states to 1660 states and 2251 transitions. [2023-04-01 10:15:55,340 INFO L78 Accepts]: Start accepts. Automaton has 1660 states and 2251 transitions. Word has length 35 [2023-04-01 10:15:55,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:15:55,340 INFO L495 AbstractCegarLoop]: Abstraction has 1660 states and 2251 transitions. [2023-04-01 10:15:55,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:15:55,341 INFO L276 IsEmpty]: Start isEmpty. Operand 1660 states and 2251 transitions. [2023-04-01 10:15:55,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-04-01 10:15:55,344 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:15:55,344 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:15:55,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 10:15:55,344 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:15:55,345 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:15:55,345 INFO L85 PathProgramCache]: Analyzing trace with hash 943808755, now seen corresponding path program 1 times [2023-04-01 10:15:55,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:15:55,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61924114] [2023-04-01 10:15:55,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:15:55,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:15:55,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:15:55,940 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 10:15:55,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:15:55,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61924114] [2023-04-01 10:15:55,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61924114] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:15:55,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838012846] [2023-04-01 10:15:55,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:15:55,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:15:55,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:15:55,944 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 10:15:55,971 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 10:15:56,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:15:56,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 10:15:56,085 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:15:56,370 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 10:15:56,370 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:15:56,929 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 10:15:56,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838012846] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 10:15:56,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 10:15:56,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2023-04-01 10:15:56,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725030562] [2023-04-01 10:15:56,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:15:56,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 10:15:56,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:15:56,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 10:15:56,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 10:15:56,933 INFO L87 Difference]: Start difference. First operand 1660 states and 2251 transitions. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 3 states have internal predecessors, (144), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:15:59,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:15:59,077 INFO L93 Difference]: Finished difference Result 4952 states and 6862 transitions. [2023-04-01 10:15:59,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 10:15:59,081 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 3 states have internal predecessors, (144), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 152 [2023-04-01 10:15:59,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:15:59,095 INFO L225 Difference]: With dead ends: 4952 [2023-04-01 10:15:59,096 INFO L226 Difference]: Without dead ends: 3297 [2023-04-01 10:15:59,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 10:15:59,101 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 348 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 1117 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 1280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 1117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-04-01 10:15:59,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 35 Invalid, 1280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 1117 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-04-01 10:15:59,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3297 states. [2023-04-01 10:15:59,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3297 to 2498. [2023-04-01 10:15:59,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2498 states, 2426 states have (on average 1.3573784006595218) internal successors, (3293), 2462 states have internal predecessors, (3293), 18 states have call successors, (18), 18 states have call predecessors, (18), 53 states have return successors, (216), 17 states have call predecessors, (216), 17 states have call successors, (216) [2023-04-01 10:15:59,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2498 states to 2498 states and 3527 transitions. [2023-04-01 10:15:59,175 INFO L78 Accepts]: Start accepts. Automaton has 2498 states and 3527 transitions. Word has length 152 [2023-04-01 10:15:59,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:15:59,176 INFO L495 AbstractCegarLoop]: Abstraction has 2498 states and 3527 transitions. [2023-04-01 10:15:59,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 3 states have internal predecessors, (144), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:15:59,176 INFO L276 IsEmpty]: Start isEmpty. Operand 2498 states and 3527 transitions. [2023-04-01 10:15:59,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-04-01 10:15:59,178 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:15:59,179 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:15:59,190 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 10:15:59,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:15:59,390 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:15:59,391 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:15:59,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1929151890, now seen corresponding path program 1 times [2023-04-01 10:15:59,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:15:59,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351455344] [2023-04-01 10:15:59,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:15:59,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:15:59,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:15:59,735 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-01 10:15:59,736 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:15:59,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351455344] [2023-04-01 10:15:59,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351455344] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:15:59,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:15:59,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:15:59,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162837357] [2023-04-01 10:15:59,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:15:59,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:15:59,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:15:59,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:15:59,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:15:59,748 INFO L87 Difference]: Start difference. First operand 2498 states and 3527 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 10:16:01,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:16:01,228 INFO L93 Difference]: Finished difference Result 6154 states and 9040 transitions. [2023-04-01 10:16:01,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:16:01,229 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 173 [2023-04-01 10:16:01,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:16:01,247 INFO L225 Difference]: With dead ends: 6154 [2023-04-01 10:16:01,247 INFO L226 Difference]: Without dead ends: 3661 [2023-04-01 10:16:01,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:16:01,255 INFO L413 NwaCegarLoop]: 413 mSDtfsCounter, 228 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-01 10:16:01,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 429 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-01 10:16:01,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3661 states. [2023-04-01 10:16:01,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3661 to 3416. [2023-04-01 10:16:01,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3416 states, 3326 states have (on average 1.2934455802766085) internal successors, (4302), 3370 states have internal predecessors, (4302), 23 states have call successors, (23), 23 states have call predecessors, (23), 66 states have return successors, (323), 22 states have call predecessors, (323), 22 states have call successors, (323) [2023-04-01 10:16:01,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3416 states to 3416 states and 4648 transitions. [2023-04-01 10:16:01,386 INFO L78 Accepts]: Start accepts. Automaton has 3416 states and 4648 transitions. Word has length 173 [2023-04-01 10:16:01,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:16:01,387 INFO L495 AbstractCegarLoop]: Abstraction has 3416 states and 4648 transitions. [2023-04-01 10:16:01,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 10:16:01,388 INFO L276 IsEmpty]: Start isEmpty. Operand 3416 states and 4648 transitions. [2023-04-01 10:16:01,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2023-04-01 10:16:01,394 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:16:01,394 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:16:01,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 10:16:01,395 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:16:01,396 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:16:01,396 INFO L85 PathProgramCache]: Analyzing trace with hash -488345814, now seen corresponding path program 1 times [2023-04-01 10:16:01,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:16:01,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154732582] [2023-04-01 10:16:01,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:16:01,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:16:01,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:16:01,690 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:16:01,690 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:16:01,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154732582] [2023-04-01 10:16:01,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154732582] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:16:01,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173265333] [2023-04-01 10:16:01,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:16:01,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:16:01,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:16:01,692 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 10:16:01,695 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 10:16:01,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:16:01,825 INFO L262 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 10:16:01,837 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:16:01,894 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:16:01,894 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:16:01,998 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:16:01,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173265333] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:16:01,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1767727037] [2023-04-01 10:16:02,054 INFO L159 IcfgInterpreter]: Started Sifa with 148 locations of interest [2023-04-01 10:16:02,054 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:16:02,057 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:16:02,061 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:16:02,062 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:16:02,352 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 83 for LOIs [2023-04-01 10:16:02,710 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 28 [2023-04-01 10:16:15,766 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 33