/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/eca-rers2012/Problem15_label22.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:13:56,605 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:13:56,607 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:13:56,658 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:13:56,658 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:13:56,660 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:13:56,665 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:13:56,667 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:13:56,669 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:13:56,672 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:13:56,674 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:13:56,675 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:13:56,676 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:13:56,677 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:13:56,680 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:13:56,681 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:13:56,682 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:13:56,682 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:13:56,684 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:13:56,704 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:13:56,705 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:13:56,705 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:13:56,706 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:13:56,707 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:13:56,713 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:13:56,713 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:13:56,713 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:13:56,714 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:13:56,715 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:13:56,715 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:13:56,715 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:13:56,716 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:13:56,717 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:13:56,717 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:13:56,718 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:13:56,718 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:13:56,719 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:13:56,719 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:13:56,719 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:13:56,719 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:13:56,720 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:13:56,721 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 04:13:56,762 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:13:56,763 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:13:56,763 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:13:56,763 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:13:56,764 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:13:56,764 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:13:56,764 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:13:56,764 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:13:56,764 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:13:56,764 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:13:56,765 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:13:56,765 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:13:56,765 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:13:56,765 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:13:56,765 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:13:56,765 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:13:56,766 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:13:56,766 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:13:56,766 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:13:56,766 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:13:56,766 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:13:56,766 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:13:56,767 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:13:56,767 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:13:56,767 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:13:56,767 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:13:56,767 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:13:56,767 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:13:56,767 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:13:56,767 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:13:56,768 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:13:56,768 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:13:56,768 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:13:56,768 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:13:56,768 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:13:56,768 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:13:56,768 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:13:56,768 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:13:56,769 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:13:56,769 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:13:56,769 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:13:56,769 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:13:57,064 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:13:57,087 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:13:57,089 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:13:57,091 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:13:57,091 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:13:57,092 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label22.c [2023-04-01 04:13:58,210 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:13:58,523 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:13:58,524 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label22.c [2023-04-01 04:13:58,540 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b8b89c0c/9ce45f68e190429b92a61289937a45a1/FLAG6669e07ed [2023-04-01 04:13:58,554 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b8b89c0c/9ce45f68e190429b92a61289937a45a1 [2023-04-01 04:13:58,556 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:13:58,558 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:13:58,560 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:13:58,560 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:13:58,563 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:13:58,563 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:13:58" (1/1) ... [2023-04-01 04:13:58,565 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35a35be0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:13:58, skipping insertion in model container [2023-04-01 04:13:58,565 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:13:58" (1/1) ... [2023-04-01 04:13:58,570 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:13:58,627 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:13:58,764 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_label22.c[2348,2361] [2023-04-01 04:13:59,114 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:13:59,124 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:13:59,144 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_label22.c[2348,2361] [2023-04-01 04:13:59,298 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:13:59,310 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:13:59,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:13:59 WrapperNode [2023-04-01 04:13:59,311 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:13:59,312 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:13:59,312 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:13:59,312 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:13:59,321 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:13:59" (1/1) ... [2023-04-01 04:13:59,321 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:13:59" (1/1) ... [2023-04-01 04:13:59,346 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:13:59" (1/1) ... [2023-04-01 04:13:59,347 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:13:59" (1/1) ... [2023-04-01 04:13:59,385 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:13:59" (1/1) ... [2023-04-01 04:13:59,395 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:13:59" (1/1) ... [2023-04-01 04:13:59,405 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:13:59" (1/1) ... [2023-04-01 04:13:59,412 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:13:59" (1/1) ... [2023-04-01 04:13:59,425 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:13:59,426 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:13:59,427 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:13:59,427 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:13:59,428 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:13:59" (1/1) ... [2023-04-01 04:13:59,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:13:59,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:13:59,477 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 04:13:59,483 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 04:13:59,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:13:59,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:13:59,505 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:13:59,505 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:13:59,505 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:13:59,505 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:13:59,506 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:13:59,506 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:13:59,506 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:13:59,506 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:13:59,506 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:13:59,506 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:13:59,506 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:13:59,506 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:13:59,506 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:13:59,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:13:59,506 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:13:59,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:13:59,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:13:59,507 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:13:59,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:13:59,560 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:13:59,562 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:14:01,408 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:14:01,987 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:14:01,987 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:14:01,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:14:01 BoogieIcfgContainer [2023-04-01 04:14:01,990 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:14:01,991 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:14:01,991 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:14:01,993 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:14:01,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:13:58" (1/3) ... [2023-04-01 04:14:01,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21b0d36d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:14:01, skipping insertion in model container [2023-04-01 04:14:01,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:13:59" (2/3) ... [2023-04-01 04:14:01,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21b0d36d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:14:01, skipping insertion in model container [2023-04-01 04:14:01,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:14:01" (3/3) ... [2023-04-01 04:14:01,995 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label22.c [2023-04-01 04:14:02,007 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:14:02,007 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:14:02,040 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:14:02,044 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;@70c77a55, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:14:02,045 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:14:02,049 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 04:14:02,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:14:02,054 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:14:02,054 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:14:02,055 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:14:02,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:14:02,059 INFO L85 PathProgramCache]: Analyzing trace with hash 271512771, now seen corresponding path program 1 times [2023-04-01 04:14:02,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:14:02,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151180320] [2023-04-01 04:14:02,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:14:02,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:14:02,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:14:02,329 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 04:14:02,330 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:14:02,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151180320] [2023-04-01 04:14:02,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151180320] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:14:02,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:14:02,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:14:02,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54959356] [2023-04-01 04:14:02,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:14:02,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:14:02,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:14:02,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:14:02,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:14:02,367 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 04:14:03,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:14:03,802 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2023-04-01 04:14:03,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:14:03,806 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 04:14:03,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:14:03,825 INFO L225 Difference]: With dead ends: 718 [2023-04-01 04:14:03,825 INFO L226 Difference]: Without dead ends: 471 [2023-04-01 04:14:03,833 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 04:14:03,842 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 235 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s 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, 1.4s IncrementalHoareTripleChecker+Time [2023-04-01 04:14:03,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 110 Invalid, 957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-01 04:14:03,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-04-01 04:14:03,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 469. [2023-04-01 04:14:03,947 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 04:14:03,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 824 transitions. [2023-04-01 04:14:03,952 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 824 transitions. Word has length 11 [2023-04-01 04:14:03,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:14:03,953 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 824 transitions. [2023-04-01 04:14:03,954 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 04:14:03,954 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 824 transitions. [2023-04-01 04:14:03,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 04:14:03,956 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:14:03,956 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 04:14:03,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:14:03,956 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:14:03,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:14:03,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1733693181, now seen corresponding path program 1 times [2023-04-01 04:14:03,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:14:03,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233054374] [2023-04-01 04:14:03,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:14:03,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:14:04,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:14:04,163 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 04:14:04,163 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:14:04,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233054374] [2023-04-01 04:14:04,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233054374] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:14:04,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:14:04,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:14:04,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503195659] [2023-04-01 04:14:04,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:14:04,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:14:04,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:14:04,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:14:04,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:14:04,168 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 04:14:06,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:14:06,100 INFO L93 Difference]: Finished difference Result 1421 states and 2520 transitions. [2023-04-01 04:14:06,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:14:06,101 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 04:14:06,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:14:06,106 INFO L225 Difference]: With dead ends: 1421 [2023-04-01 04:14:06,106 INFO L226 Difference]: Without dead ends: 957 [2023-04-01 04:14:06,107 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 04:14:06,108 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 749 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1415 mSolverCounterSat, 326 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 749 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 326 IncrementalHoareTripleChecker+Valid, 1415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-04-01 04:14:06,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [749 Valid, 47 Invalid, 1741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [326 Valid, 1415 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-04-01 04:14:06,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2023-04-01 04:14:06,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 932. [2023-04-01 04:14:06,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 912 states have (on average 1.493421052631579) internal successors, (1362), 916 states have internal predecessors, (1362), 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 04:14:06,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1397 transitions. [2023-04-01 04:14:06,141 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1397 transitions. Word has length 23 [2023-04-01 04:14:06,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:14:06,141 INFO L495 AbstractCegarLoop]: Abstraction has 932 states and 1397 transitions. [2023-04-01 04:14:06,141 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 04:14:06,141 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1397 transitions. [2023-04-01 04:14:06,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-01 04:14:06,142 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:14:06,142 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] [2023-04-01 04:14:06,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:14:06,142 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:14:06,143 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:14:06,143 INFO L85 PathProgramCache]: Analyzing trace with hash 463347538, now seen corresponding path program 1 times [2023-04-01 04:14:06,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:14:06,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773884866] [2023-04-01 04:14:06,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:14:06,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:14:06,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:14:06,274 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 04:14:06,274 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:14:06,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773884866] [2023-04-01 04:14:06,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773884866] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:14:06,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:14:06,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:14:06,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898215211] [2023-04-01 04:14:06,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:14:06,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:14:06,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:14:06,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:14:06,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:14:06,276 INFO L87 Difference]: Start difference. First operand 932 states and 1397 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 04:14:08,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:14:08,394 INFO L93 Difference]: Finished difference Result 2827 states and 4320 transitions. [2023-04-01 04:14:08,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:14:08,396 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 24 [2023-04-01 04:14:08,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:14:08,421 INFO L225 Difference]: With dead ends: 2827 [2023-04-01 04:14:08,421 INFO L226 Difference]: Without dead ends: 1900 [2023-04-01 04:14:08,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-01 04:14:08,429 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 735 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1605 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 735 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 1605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:14:08,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [735 Valid, 63 Invalid, 1853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 1605 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-04-01 04:14:08,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1900 states. [2023-04-01 04:14:08,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1900 to 1644. [2023-04-01 04:14:08,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1644 states, 1603 states have (on average 1.3437305053025577) internal successors, (2154), 1622 states have internal predecessors, (2154), 11 states have call successors, (11), 11 states have call predecessors, (11), 29 states have return successors, (80), 10 states have call predecessors, (80), 10 states have call successors, (80) [2023-04-01 04:14:08,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1644 states to 1644 states and 2245 transitions. [2023-04-01 04:14:08,521 INFO L78 Accepts]: Start accepts. Automaton has 1644 states and 2245 transitions. Word has length 24 [2023-04-01 04:14:08,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:14:08,521 INFO L495 AbstractCegarLoop]: Abstraction has 1644 states and 2245 transitions. [2023-04-01 04:14:08,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 04:14:08,522 INFO L276 IsEmpty]: Start isEmpty. Operand 1644 states and 2245 transitions. [2023-04-01 04:14:08,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-01 04:14:08,523 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:14:08,523 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2023-04-01 04:14:08,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:14:08,523 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:14:08,523 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:14:08,524 INFO L85 PathProgramCache]: Analyzing trace with hash 153977330, now seen corresponding path program 1 times [2023-04-01 04:14:08,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:14:08,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669172542] [2023-04-01 04:14:08,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:14:08,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:14:08,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:14:08,690 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 04:14:08,691 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:14:08,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669172542] [2023-04-01 04:14:08,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669172542] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:14:08,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454920717] [2023-04-01 04:14:08,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:14:08,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:14:08,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:14:08,713 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 04:14:08,717 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 04:14:08,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:14:08,802 INFO L262 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 04:14:08,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:14:08,901 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 04:14:08,901 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:14:09,131 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 04:14:09,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454920717] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 04:14:09,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 04:14:09,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2023-04-01 04:14:09,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640740204] [2023-04-01 04:14:09,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:14:09,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:14:09,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:14:09,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:14:09,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:14:09,133 INFO L87 Difference]: Start difference. First operand 1644 states and 2245 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 04:14:10,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:14:10,829 INFO L93 Difference]: Finished difference Result 4242 states and 6011 transitions. [2023-04-01 04:14:10,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 04:14:10,832 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 60 [2023-04-01 04:14:10,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:14:10,842 INFO L225 Difference]: With dead ends: 4242 [2023-04-01 04:14:10,842 INFO L226 Difference]: Without dead ends: 2603 [2023-04-01 04:14:10,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 119 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-04-01 04:14:10,851 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 742 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 1016 mSolverCounterSat, 508 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 508 IncrementalHoareTripleChecker+Valid, 1016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-04-01 04:14:10,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [742 Valid, 37 Invalid, 1524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [508 Valid, 1016 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-04-01 04:14:10,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2603 states. [2023-04-01 04:14:10,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2603 to 2367. [2023-04-01 04:14:10,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2367 states, 2303 states have (on average 1.2835432045158488) internal successors, (2956), 2333 states have internal predecessors, (2956), 17 states have call successors, (17), 17 states have call predecessors, (17), 46 states have return successors, (139), 16 states have call predecessors, (139), 16 states have call successors, (139) [2023-04-01 04:14:10,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2367 states to 2367 states and 3112 transitions. [2023-04-01 04:14:10,907 INFO L78 Accepts]: Start accepts. Automaton has 2367 states and 3112 transitions. Word has length 60 [2023-04-01 04:14:10,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:14:10,908 INFO L495 AbstractCegarLoop]: Abstraction has 2367 states and 3112 transitions. [2023-04-01 04:14:10,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 04:14:10,908 INFO L276 IsEmpty]: Start isEmpty. Operand 2367 states and 3112 transitions. [2023-04-01 04:14:10,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-04-01 04:14:10,915 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:14:10,916 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:14:10,923 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 04:14:11,122 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 04:14:11,123 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:14:11,123 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:14:11,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1954208853, now seen corresponding path program 1 times [2023-04-01 04:14:11,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:14:11,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223241294] [2023-04-01 04:14:11,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:14:11,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:14:11,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:14:11,823 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:14:11,824 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:14:11,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223241294] [2023-04-01 04:14:11,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223241294] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:14:11,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85876934] [2023-04-01 04:14:11,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:14:11,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:14:11,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:14:11,833 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 04:14:11,892 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 04:14:11,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:14:11,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 04:14:11,977 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:14:12,396 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 04:14:12,396 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 04:14:12,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85876934] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:14:12,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 04:14:12,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2023-04-01 04:14:12,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78970123] [2023-04-01 04:14:12,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:14:12,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:14:12,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:14:12,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:14:12,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-01 04:14:12,398 INFO L87 Difference]: Start difference. First operand 2367 states and 3112 transitions. Second operand has 5 states, 5 states have (on average 30.0) internal successors, (150), 4 states have internal predecessors, (150), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 04:14:14,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:14:14,462 INFO L93 Difference]: Finished difference Result 5727 states and 7450 transitions. [2023-04-01 04:14:14,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 04:14:14,477 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.0) internal successors, (150), 4 states have internal predecessors, (150), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 162 [2023-04-01 04:14:14,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:14:14,488 INFO L225 Difference]: With dead ends: 5727 [2023-04-01 04:14:14,490 INFO L226 Difference]: Without dead ends: 3365 [2023-04-01 04:14:14,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-04-01 04:14:14,497 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 422 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 1343 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 1343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-04-01 04:14:14,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 49 Invalid, 1692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [349 Valid, 1343 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-04-01 04:14:14,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3365 states. [2023-04-01 04:14:14,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3365 to 3091. [2023-04-01 04:14:14,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3091 states, 3001 states have (on average 1.2295901366211264) internal successors, (3690), 3048 states have internal predecessors, (3690), 22 states have call successors, (22), 22 states have call predecessors, (22), 67 states have return successors, (202), 20 states have call predecessors, (202), 21 states have call successors, (202) [2023-04-01 04:14:14,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3091 states to 3091 states and 3914 transitions. [2023-04-01 04:14:14,573 INFO L78 Accepts]: Start accepts. Automaton has 3091 states and 3914 transitions. Word has length 162 [2023-04-01 04:14:14,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:14:14,575 INFO L495 AbstractCegarLoop]: Abstraction has 3091 states and 3914 transitions. [2023-04-01 04:14:14,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.0) internal successors, (150), 4 states have internal predecessors, (150), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 04:14:14,575 INFO L276 IsEmpty]: Start isEmpty. Operand 3091 states and 3914 transitions. [2023-04-01 04:14:14,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2023-04-01 04:14:14,581 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:14:14,581 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:14:14,589 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 04:14:14,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:14:14,787 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:14:14,788 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:14:14,788 INFO L85 PathProgramCache]: Analyzing trace with hash -404134917, now seen corresponding path program 1 times [2023-04-01 04:14:14,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:14:14,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380958810] [2023-04-01 04:14:14,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:14:14,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:14:14,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:14:15,111 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 04:14:15,112 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:14:15,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380958810] [2023-04-01 04:14:15,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380958810] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:14:15,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:14:15,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:14:15,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449275740] [2023-04-01 04:14:15,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:14:15,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:14:15,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:14:15,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:14:15,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:14:15,114 INFO L87 Difference]: Start difference. First operand 3091 states and 3914 transitions. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 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 04:14:16,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:14:16,303 INFO L93 Difference]: Finished difference Result 7338 states and 9691 transitions. [2023-04-01 04:14:16,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:14:16,303 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 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 247 [2023-04-01 04:14:16,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:14:16,314 INFO L225 Difference]: With dead ends: 7338 [2023-04-01 04:14:16,315 INFO L226 Difference]: Without dead ends: 4476 [2023-04-01 04:14:16,336 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 04:14:16,336 INFO L413 NwaCegarLoop]: 413 mSDtfsCounter, 228 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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, 1.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:14:16,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 429 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-01 04:14:16,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4476 states. [2023-04-01 04:14:16,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4476 to 3823. [2023-04-01 04:14:16,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3823 states, 3718 states have (on average 1.2079074771382463) internal successors, (4491), 3772 states have internal predecessors, (4491), 26 states have call successors, (26), 26 states have call predecessors, (26), 78 states have return successors, (274), 24 states have call predecessors, (274), 25 states have call successors, (274) [2023-04-01 04:14:16,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3823 states to 3823 states and 4791 transitions. [2023-04-01 04:14:16,492 INFO L78 Accepts]: Start accepts. Automaton has 3823 states and 4791 transitions. Word has length 247 [2023-04-01 04:14:16,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:14:16,493 INFO L495 AbstractCegarLoop]: Abstraction has 3823 states and 4791 transitions. [2023-04-01 04:14:16,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 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 04:14:16,494 INFO L276 IsEmpty]: Start isEmpty. Operand 3823 states and 4791 transitions. [2023-04-01 04:14:16,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2023-04-01 04:14:16,496 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:14:16,496 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:14:16,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 04:14:16,497 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:14:16,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:14:16,497 INFO L85 PathProgramCache]: Analyzing trace with hash 575418196, now seen corresponding path program 1 times [2023-04-01 04:14:16,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:14:16,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329093198] [2023-04-01 04:14:16,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:14:16,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:14:16,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:14:17,557 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 04:14:17,557 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:14:17,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329093198] [2023-04-01 04:14:17,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329093198] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:14:17,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969843275] [2023-04-01 04:14:17,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:14:17,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:14:17,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:14:17,564 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:14:17,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 04:14:17,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:14:17,725 INFO L262 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 04:14:17,731 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:14:20,310 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 04:14:20,310 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:14:20,729 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 04:14:20,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969843275] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 04:14:20,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 04:14:20,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 6] total 13 [2023-04-01 04:14:20,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005030077] [2023-04-01 04:14:20,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:14:20,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:14:20,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:14:20,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:14:20,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-04-01 04:14:20,731 INFO L87 Difference]: Start difference. First operand 3823 states and 4791 transitions. Second operand has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 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 04:14:21,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:14:21,992 INFO L93 Difference]: Finished difference Result 9559 states and 12373 transitions. [2023-04-01 04:14:22,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:14:22,005 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 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 248 [2023-04-01 04:14:22,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:14:22,027 INFO L225 Difference]: With dead ends: 9559 [2023-04-01 04:14:22,028 INFO L226 Difference]: Without dead ends: 5965 [2023-04-01 04:14:22,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 492 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-04-01 04:14:22,037 INFO L413 NwaCegarLoop]: 392 mSDtfsCounter, 247 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 278 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 278 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-01 04:14:22,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 408 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [278 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-01 04:14:22,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5965 states. [2023-04-01 04:14:22,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5965 to 5393. [2023-04-01 04:14:22,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5393 states, 5258 states have (on average 1.1631799163179917) internal successors, (6116), 5330 states have internal predecessors, (6116), 32 states have call successors, (32), 32 states have call predecessors, (32), 102 states have return successors, (421), 30 states have call predecessors, (421), 31 states have call successors, (421) [2023-04-01 04:14:22,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5393 states to 5393 states and 6569 transitions. [2023-04-01 04:14:22,138 INFO L78 Accepts]: Start accepts. Automaton has 5393 states and 6569 transitions. Word has length 248 [2023-04-01 04:14:22,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:14:22,139 INFO L495 AbstractCegarLoop]: Abstraction has 5393 states and 6569 transitions. [2023-04-01 04:14:22,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 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 04:14:22,139 INFO L276 IsEmpty]: Start isEmpty. Operand 5393 states and 6569 transitions. [2023-04-01 04:14:22,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2023-04-01 04:14:22,141 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:14:22,142 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:14:22,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 04:14:22,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:14:22,349 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:14:22,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:14:22,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1922849534, now seen corresponding path program 1 times [2023-04-01 04:14:22,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:14:22,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206348405] [2023-04-01 04:14:22,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:14:22,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:14:22,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:14:22,675 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 42 proven. 13 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-01 04:14:22,676 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:14:22,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206348405] [2023-04-01 04:14:22,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206348405] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:14:22,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504576752] [2023-04-01 04:14:22,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:14:22,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:14:22,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:14:22,677 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:14:22,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 04:14:22,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:14:22,815 INFO L262 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:14:22,818 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:14:22,867 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 58 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 04:14:22,868 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:14:22,971 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 42 proven. 13 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-01 04:14:22,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504576752] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:14:22,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1144985646] [2023-04-01 04:14:22,999 INFO L159 IcfgInterpreter]: Started Sifa with 222 locations of interest [2023-04-01 04:14:22,999 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:14:23,005 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:14:23,011 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:14:23,011 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:14:23,103 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 51 for LOIs [2023-04-01 04:14:23,715 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2023-04-01 04:14:30,951 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 49