/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/Problem16_label51.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:20:08,618 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:20:08,620 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:20:08,659 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:20:08,659 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:20:08,660 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:20:08,661 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:20:08,662 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:20:08,663 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:20:08,664 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:20:08,664 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:20:08,666 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:20:08,667 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:20:08,671 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:20:08,672 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:20:08,674 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:20:08,674 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:20:08,675 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:20:08,677 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:20:08,682 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:20:08,682 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:20:08,684 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:20:08,685 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:20:08,686 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:20:08,693 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:20:08,693 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:20:08,694 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:20:08,695 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:20:08,695 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:20:08,696 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:20:08,696 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:20:08,696 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:20:08,697 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:20:08,698 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:20:08,698 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:20:08,698 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:20:08,699 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:20:08,699 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:20:08,699 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:20:08,699 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:20:08,700 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:20:08,701 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 04:20:08,728 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:20:08,728 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:20:08,729 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:20:08,729 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:20:08,730 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:20:08,730 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:20:08,730 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:20:08,730 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:20:08,730 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:20:08,730 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:20:08,731 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:20:08,731 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:20:08,731 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:20:08,731 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:20:08,731 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:20:08,731 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:20:08,732 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:20:08,732 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:20:08,732 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:20:08,732 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:20:08,732 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:20:08,733 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:20:08,733 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:20:08,733 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:20:08,733 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:20:08,733 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:20:08,733 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:20:08,733 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:20:08,733 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:20:08,734 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:20:08,734 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:20:08,734 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:20:08,734 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:20:08,734 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:20:08,734 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:20:08,735 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:20:08,735 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:20:08,735 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:20:08,735 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:20:08,735 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:20:08,735 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:20:08,735 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:20:08,963 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:20:08,979 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:20:08,981 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:20:08,983 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:20:08,983 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:20:08,984 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem16_label51.c [2023-04-01 04:20:10,138 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:20:10,459 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:20:10,460 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label51.c [2023-04-01 04:20:10,475 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b3c96d68/05e06639bc404c148ee59067efc5162e/FLAG4893364b0 [2023-04-01 04:20:10,488 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b3c96d68/05e06639bc404c148ee59067efc5162e [2023-04-01 04:20:10,491 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:20:10,492 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:20:10,494 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:20:10,494 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:20:10,497 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:20:10,498 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:20:10" (1/1) ... [2023-04-01 04:20:10,499 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1254fcb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:20:10, skipping insertion in model container [2023-04-01 04:20:10,499 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:20:10" (1/1) ... [2023-04-01 04:20:10,505 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:20:10,569 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:20:10,778 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/Problem16_label51.c[1726,1739] [2023-04-01 04:20:11,193 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:20:11,206 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:20:11,221 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/Problem16_label51.c[1726,1739] [2023-04-01 04:20:11,381 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:20:11,399 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:20:11,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:20:11 WrapperNode [2023-04-01 04:20:11,399 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:20:11,401 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:20:11,401 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:20:11,401 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:20:11,413 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:20:11" (1/1) ... [2023-04-01 04:20:11,413 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:20:11" (1/1) ... [2023-04-01 04:20:11,458 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:20:11" (1/1) ... [2023-04-01 04:20:11,459 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:20:11" (1/1) ... [2023-04-01 04:20:11,504 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:20:11" (1/1) ... [2023-04-01 04:20:11,517 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:20:11" (1/1) ... [2023-04-01 04:20:11,537 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:20:11" (1/1) ... [2023-04-01 04:20:11,546 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:20:11" (1/1) ... [2023-04-01 04:20:11,560 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:20:11,561 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:20:11,561 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:20:11,561 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:20:11,562 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:20:11" (1/1) ... [2023-04-01 04:20:11,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:20:11,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:20:11,590 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 04:20:11,613 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 04:20:11,630 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:20:11,630 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:20:11,630 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:20:11,631 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:20:11,632 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:20:11,632 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:20:11,632 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:20:11,632 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:20:11,632 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:20:11,632 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:20:11,632 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:20:11,633 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:20:11,633 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:20:11,633 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:20:11,633 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:20:11,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:20:11,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:20:11,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:20:11,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:20:11,633 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:20:11,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:20:11,718 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:20:11,721 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:20:13,583 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:20:14,633 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:20:14,633 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:20:14,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:20:14 BoogieIcfgContainer [2023-04-01 04:20:14,638 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:20:14,641 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:20:14,641 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:20:14,644 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:20:14,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:20:10" (1/3) ... [2023-04-01 04:20:14,644 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d8b0d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:20:14, skipping insertion in model container [2023-04-01 04:20:14,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:20:11" (2/3) ... [2023-04-01 04:20:14,645 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d8b0d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:20:14, skipping insertion in model container [2023-04-01 04:20:14,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:20:14" (3/3) ... [2023-04-01 04:20:14,646 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label51.c [2023-04-01 04:20:14,662 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:20:14,663 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:20:14,721 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:20:14,727 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;@54a068c1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:20:14,727 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:20:14,733 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 04:20:14,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:20:14,740 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:20:14,740 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:20:14,741 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:20:14,746 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:20:14,746 INFO L85 PathProgramCache]: Analyzing trace with hash -510227897, now seen corresponding path program 1 times [2023-04-01 04:20:14,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:20:14,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42911562] [2023-04-01 04:20:14,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:20:14,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:20:14,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:20:15,020 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 04:20:15,021 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:20:15,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42911562] [2023-04-01 04:20:15,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42911562] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:20:15,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:20:15,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:20:15,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38822115] [2023-04-01 04:20:15,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:20:15,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:20:15,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:20:15,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:20:15,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:20:15,065 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 04:20:16,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:20:16,439 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2023-04-01 04:20:16,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:20:16,443 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 04:20:16,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:20:16,462 INFO L225 Difference]: With dead ends: 718 [2023-04-01 04:20:16,462 INFO L226 Difference]: Without dead ends: 471 [2023-04-01 04:20:16,467 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 04:20:16,482 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 272 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 372 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-01 04:20:16,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 63 Invalid, 1031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [372 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-01 04:20:16,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-04-01 04:20:16,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 455. [2023-04-01 04:20:16,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 445 states have (on average 1.901123595505618) internal successors, (846), 445 states have internal predecessors, (846), 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 04:20:16,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 857 transitions. [2023-04-01 04:20:16,566 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 857 transitions. Word has length 11 [2023-04-01 04:20:16,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:20:16,567 INFO L495 AbstractCegarLoop]: Abstraction has 455 states and 857 transitions. [2023-04-01 04:20:16,567 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 04:20:16,567 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 857 transitions. [2023-04-01 04:20:16,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 04:20:16,569 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:20:16,569 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:20:16,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:20:16,569 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:20:16,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:20:16,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1454029848, now seen corresponding path program 1 times [2023-04-01 04:20:16,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:20:16,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431478836] [2023-04-01 04:20:16,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:20:16,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:20:16,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:20:16,848 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 04:20:16,848 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:20:16,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431478836] [2023-04-01 04:20:16,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431478836] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:20:16,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:20:16,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:20:16,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910557161] [2023-04-01 04:20:16,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:20:16,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:20:16,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:20:16,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:20:16,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:20:16,852 INFO L87 Difference]: Start difference. First operand 455 states and 857 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 04:20:18,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:20:18,351 INFO L93 Difference]: Finished difference Result 1369 states and 2614 transitions. [2023-04-01 04:20:18,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:20:18,353 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 21 [2023-04-01 04:20:18,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:20:18,359 INFO L225 Difference]: With dead ends: 1369 [2023-04-01 04:20:18,359 INFO L226 Difference]: Without dead ends: 919 [2023-04-01 04:20:18,361 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 04:20:18,362 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 876 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1303 mSolverCounterSat, 387 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 876 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 387 IncrementalHoareTripleChecker+Valid, 1303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-01 04:20:18,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [876 Valid, 43 Invalid, 1690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [387 Valid, 1303 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-01 04:20:18,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2023-04-01 04:20:18,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 879. [2023-04-01 04:20:18,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 862 states have (on average 1.78538283062645) internal successors, (1539), 865 states have internal predecessors, (1539), 7 states have call successors, (7), 7 states have call predecessors, (7), 9 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2023-04-01 04:20:18,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1570 transitions. [2023-04-01 04:20:18,415 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1570 transitions. Word has length 21 [2023-04-01 04:20:18,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:20:18,416 INFO L495 AbstractCegarLoop]: Abstraction has 879 states and 1570 transitions. [2023-04-01 04:20:18,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 04:20:18,416 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1570 transitions. [2023-04-01 04:20:18,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-04-01 04:20:18,417 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:20:18,417 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] [2023-04-01 04:20:18,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:20:18,418 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:20:18,418 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:20:18,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1795502601, now seen corresponding path program 1 times [2023-04-01 04:20:18,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:20:18,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302484491] [2023-04-01 04:20:18,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:20:18,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:20:18,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:20:18,607 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 04:20:18,607 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:20:18,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302484491] [2023-04-01 04:20:18,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302484491] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:20:18,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:20:18,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:20:18,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352802486] [2023-04-01 04:20:18,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:20:18,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:20:18,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:20:18,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:20:18,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:20:18,610 INFO L87 Difference]: Start difference. First operand 879 states and 1570 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), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:20:20,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:20:20,052 INFO L93 Difference]: Finished difference Result 2430 states and 4393 transitions. [2023-04-01 04:20:20,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:20:20,053 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), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 50 [2023-04-01 04:20:20,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:20:20,061 INFO L225 Difference]: With dead ends: 2430 [2023-04-01 04:20:20,061 INFO L226 Difference]: Without dead ends: 1556 [2023-04-01 04:20:20,063 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 04:20:20,064 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 940 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 940 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 439 IncrementalHoareTripleChecker+Valid, 1145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-01 04:20:20,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [940 Valid, 45 Invalid, 1584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [439 Valid, 1145 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-01 04:20:20,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1556 states. [2023-04-01 04:20:20,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1556 to 1540. [2023-04-01 04:20:20,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1540 states, 1510 states have (on average 1.4933774834437086) internal successors, (2255), 1518 states have internal predecessors, (2255), 11 states have call successors, (11), 11 states have call predecessors, (11), 18 states have return successors, (61), 10 states have call predecessors, (61), 10 states have call successors, (61) [2023-04-01 04:20:20,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1540 states to 1540 states and 2327 transitions. [2023-04-01 04:20:20,113 INFO L78 Accepts]: Start accepts. Automaton has 1540 states and 2327 transitions. Word has length 50 [2023-04-01 04:20:20,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:20:20,113 INFO L495 AbstractCegarLoop]: Abstraction has 1540 states and 2327 transitions. [2023-04-01 04:20:20,113 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), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:20:20,114 INFO L276 IsEmpty]: Start isEmpty. Operand 1540 states and 2327 transitions. [2023-04-01 04:20:20,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-04-01 04:20:20,116 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:20:20,116 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] [2023-04-01 04:20:20,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:20:20,116 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:20:20,117 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:20:20,117 INFO L85 PathProgramCache]: Analyzing trace with hash -651135215, now seen corresponding path program 1 times [2023-04-01 04:20:20,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:20:20,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936002179] [2023-04-01 04:20:20,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:20:20,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:20:20,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:20:20,338 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 04:20:20,339 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:20:20,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936002179] [2023-04-01 04:20:20,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936002179] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:20:20,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87466316] [2023-04-01 04:20:20,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:20:20,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:20:20,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:20:20,344 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 04:20:20,346 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 04:20:20,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:20:20,463 INFO L262 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:20:20,470 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:20:20,540 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 04:20:20,540 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 04:20:20,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87466316] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:20:20,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 04:20:20,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-04-01 04:20:20,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126341046] [2023-04-01 04:20:20,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:20:20,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:20:20,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:20:20,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:20:20,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:20:20,542 INFO L87 Difference]: Start difference. First operand 1540 states and 2327 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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 04:20:21,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:20:21,656 INFO L93 Difference]: Finished difference Result 3304 states and 4993 transitions. [2023-04-01 04:20:21,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:20:21,659 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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 91 [2023-04-01 04:20:21,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:20:21,670 INFO L225 Difference]: With dead ends: 3304 [2023-04-01 04:20:21,671 INFO L226 Difference]: Without dead ends: 1769 [2023-04-01 04:20:21,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:20:21,682 INFO L413 NwaCegarLoop]: 407 mSDtfsCounter, 237 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:20:21,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 423 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-01 04:20:21,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1769 states. [2023-04-01 04:20:21,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1769 to 1764. [2023-04-01 04:20:21,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1764 states, 1733 states have (on average 1.4529717253317946) internal successors, (2518), 1740 states have internal predecessors, (2518), 12 states have call successors, (12), 12 states have call predecessors, (12), 18 states have return successors, (67), 11 states have call predecessors, (67), 11 states have call successors, (67) [2023-04-01 04:20:21,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 2597 transitions. [2023-04-01 04:20:21,747 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 2597 transitions. Word has length 91 [2023-04-01 04:20:21,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:20:21,750 INFO L495 AbstractCegarLoop]: Abstraction has 1764 states and 2597 transitions. [2023-04-01 04:20:21,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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 04:20:21,750 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 2597 transitions. [2023-04-01 04:20:21,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2023-04-01 04:20:21,763 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:20:21,763 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, 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 04:20:21,776 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 04:20:21,971 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 04:20:21,971 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:20:21,972 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:20:21,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1923432596, now seen corresponding path program 1 times [2023-04-01 04:20:21,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:20:21,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27510859] [2023-04-01 04:20:21,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:20:21,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:20:22,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:20:22,421 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 04:20:22,421 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:20:22,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27510859] [2023-04-01 04:20:22,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27510859] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:20:22,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:20:22,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:20:22,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754587118] [2023-04-01 04:20:22,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:20:22,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:20:22,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:20:22,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:20:22,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:20:22,433 INFO L87 Difference]: Start difference. First operand 1764 states and 2597 transitions. Second operand has 5 states, 5 states have (on average 33.8) internal successors, (169), 4 states have internal predecessors, (169), 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 04:20:23,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:20:23,925 INFO L93 Difference]: Finished difference Result 4251 states and 6254 transitions. [2023-04-01 04:20:23,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:20:23,926 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.8) internal successors, (169), 4 states have internal predecessors, (169), 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 175 [2023-04-01 04:20:23,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:20:24,002 INFO L225 Difference]: With dead ends: 4251 [2023-04-01 04:20:24,003 INFO L226 Difference]: Without dead ends: 2492 [2023-04-01 04:20:24,007 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 04:20:24,009 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 488 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1294 mSolverCounterSat, 422 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 422 IncrementalHoareTripleChecker+Valid, 1294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-01 04:20:24,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [488 Valid, 49 Invalid, 1716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [422 Valid, 1294 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-01 04:20:24,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2492 states. [2023-04-01 04:20:24,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2492 to 2450. [2023-04-01 04:20:24,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2450 states, 2400 states have (on average 1.3895833333333334) internal successors, (3335), 2420 states have internal predecessors, (3335), 15 states have call successors, (15), 15 states have call predecessors, (15), 34 states have return successors, (139), 14 states have call predecessors, (139), 14 states have call successors, (139) [2023-04-01 04:20:24,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2450 states to 2450 states and 3489 transitions. [2023-04-01 04:20:24,078 INFO L78 Accepts]: Start accepts. Automaton has 2450 states and 3489 transitions. Word has length 175 [2023-04-01 04:20:24,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:20:24,078 INFO L495 AbstractCegarLoop]: Abstraction has 2450 states and 3489 transitions. [2023-04-01 04:20:24,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.8) internal successors, (169), 4 states have internal predecessors, (169), 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 04:20:24,079 INFO L276 IsEmpty]: Start isEmpty. Operand 2450 states and 3489 transitions. [2023-04-01 04:20:24,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2023-04-01 04:20:24,081 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:20:24,082 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:20:24,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 04:20:24,082 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:20:24,082 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:20:24,083 INFO L85 PathProgramCache]: Analyzing trace with hash -617713307, now seen corresponding path program 1 times [2023-04-01 04:20:24,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:20:24,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937230508] [2023-04-01 04:20:24,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:20:24,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:20:24,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:20:24,351 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 73 proven. 56 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-04-01 04:20:24,351 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:20:24,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937230508] [2023-04-01 04:20:24,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937230508] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:20:24,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614581743] [2023-04-01 04:20:24,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:20:24,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:20:24,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:20:24,353 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 04:20:24,357 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 04:20:24,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:20:24,499 INFO L262 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:20:24,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:20:24,612 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 176 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 04:20:24,613 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:20:24,852 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 73 proven. 56 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-04-01 04:20:24,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614581743] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:20:24,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1703713663] [2023-04-01 04:20:24,872 INFO L159 IcfgInterpreter]: Started Sifa with 77 locations of interest [2023-04-01 04:20:24,872 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:20:24,876 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:20:24,880 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:20:24,880 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:20:25,027 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 46 for LOIs [2023-04-01 04:20:25,170 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2023-04-01 04:20:31,019 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 53