/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/eca-rers2012/Problem01_label34.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 09:15:42,649 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 09:15:42,650 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 09:15:42,681 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 09:15:42,681 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 09:15:42,681 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 09:15:42,682 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 09:15:42,683 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 09:15:42,684 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 09:15:42,684 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 09:15:42,686 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 09:15:42,687 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 09:15:42,688 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 09:15:42,691 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 09:15:42,692 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 09:15:42,693 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 09:15:42,693 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 09:15:42,694 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 09:15:42,696 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 09:15:42,699 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 09:15:42,700 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 09:15:42,701 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 09:15:42,702 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 09:15:42,702 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 09:15:42,708 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 09:15:42,708 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 09:15:42,708 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 09:15:42,709 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 09:15:42,710 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 09:15:42,710 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 09:15:42,710 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 09:15:42,711 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 09:15:42,712 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 09:15:42,712 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 09:15:42,712 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 09:15:42,712 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 09:15:42,713 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 09:15:42,713 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 09:15:42,713 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 09:15:42,713 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 09:15:42,714 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 09:15:42,715 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 09:15:42,736 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 09:15:42,737 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 09:15:42,737 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 09:15:42,737 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 09:15:42,738 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 09:15:42,738 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 09:15:42,738 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 09:15:42,738 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 09:15:42,738 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 09:15:42,738 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 09:15:42,739 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 09:15:42,739 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 09:15:42,739 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 09:15:42,739 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 09:15:42,739 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 09:15:42,739 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 09:15:42,739 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 09:15:42,739 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 09:15:42,740 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 09:15:42,740 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 09:15:42,740 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 09:15:42,740 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 09:15:42,740 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 09:15:42,740 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 09:15:42,740 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 09:15:42,740 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 09:15:42,740 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 09:15:42,741 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 09:15:42,741 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 09:15:42,741 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 09:15:42,741 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 09:15:42,741 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 09:15:42,741 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:15:42,741 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 09:15:42,741 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 09:15:42,741 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 09:15:42,741 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 09:15:42,742 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 09:15:42,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 09:15:42,742 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 09:15:42,742 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 09:15:42,742 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 09:15:42,910 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 09:15:42,924 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 09:15:42,926 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 09:15:42,926 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 09:15:42,927 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 09:15:42,927 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem01_label34.c [2023-04-01 09:15:43,849 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 09:15:44,103 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 09:15:44,103 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem01_label34.c [2023-04-01 09:15:44,110 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33f5c7158/f3263f3e98f84a659eb0564e970c9ee1/FLAG17894b8d1 [2023-04-01 09:15:44,120 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33f5c7158/f3263f3e98f84a659eb0564e970c9ee1 [2023-04-01 09:15:44,121 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 09:15:44,122 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 09:15:44,123 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 09:15:44,123 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 09:15:44,126 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 09:15:44,126 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:15:44" (1/1) ... [2023-04-01 09:15:44,127 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67c3e9a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:15:44, skipping insertion in model container [2023-04-01 09:15:44,127 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:15:44" (1/1) ... [2023-04-01 09:15:44,131 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 09:15:44,174 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 09:15:44,342 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/Problem01_label34.c[18605,18618] [2023-04-01 09:15:44,365 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:15:44,373 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 09:15:44,457 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/Problem01_label34.c[18605,18618] [2023-04-01 09:15:44,476 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:15:44,489 INFO L208 MainTranslator]: Completed translation [2023-04-01 09:15:44,489 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:15:44 WrapperNode [2023-04-01 09:15:44,489 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 09:15:44,491 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 09:15:44,491 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 09:15:44,491 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 09:15:44,499 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:15:44" (1/1) ... [2023-04-01 09:15:44,499 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:15:44" (1/1) ... [2023-04-01 09:15:44,520 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:15:44" (1/1) ... [2023-04-01 09:15:44,521 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:15:44" (1/1) ... [2023-04-01 09:15:44,542 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:15:44" (1/1) ... [2023-04-01 09:15:44,559 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:15:44" (1/1) ... [2023-04-01 09:15:44,563 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:15:44" (1/1) ... [2023-04-01 09:15:44,566 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:15:44" (1/1) ... [2023-04-01 09:15:44,571 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 09:15:44,572 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 09:15:44,572 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 09:15:44,572 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 09:15:44,573 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:15:44" (1/1) ... [2023-04-01 09:15:44,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:15:44,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:15:44,602 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 09:15:44,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 09:15:44,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 09:15:44,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 09:15:44,629 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 09:15:44,629 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 09:15:44,629 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 09:15:44,629 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 09:15:44,629 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 09:15:44,629 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 09:15:44,629 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 09:15:44,629 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 09:15:44,630 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 09:15:44,630 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 09:15:44,630 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 09:15:44,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 09:15:44,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 09:15:44,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 09:15:44,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 09:15:44,630 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 09:15:44,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 09:15:44,683 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 09:15:44,685 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 09:15:45,444 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 09:15:45,631 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 09:15:45,631 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 09:15:45,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:15:45 BoogieIcfgContainer [2023-04-01 09:15:45,633 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 09:15:45,636 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 09:15:45,636 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 09:15:45,638 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 09:15:45,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 09:15:44" (1/3) ... [2023-04-01 09:15:45,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69d2f59c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:15:45, skipping insertion in model container [2023-04-01 09:15:45,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:15:44" (2/3) ... [2023-04-01 09:15:45,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69d2f59c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:15:45, skipping insertion in model container [2023-04-01 09:15:45,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:15:45" (3/3) ... [2023-04-01 09:15:45,642 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem01_label34.c [2023-04-01 09:15:45,657 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 09:15:45,657 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 09:15:45,692 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 09:15:45,696 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;@43f2bad9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 09:15:45,697 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 09:15:45,703 INFO L276 IsEmpty]: Start isEmpty. Operand has 86 states, 78 states have (on average 1.8974358974358974) internal successors, (148), 79 states have internal predecessors, (148), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 09:15:45,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-04-01 09:15:45,711 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:15:45,711 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:15:45,712 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:15:45,716 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:15:45,717 INFO L85 PathProgramCache]: Analyzing trace with hash -2062136350, now seen corresponding path program 1 times [2023-04-01 09:15:45,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:15:45,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318302486] [2023-04-01 09:15:45,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:15:45,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:15:45,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:15:46,197 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 09:15:46,198 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:15:46,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318302486] [2023-04-01 09:15:46,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318302486] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:15:46,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:15:46,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 09:15:46,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101702345] [2023-04-01 09:15:46,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:15:46,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 09:15:46,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:15:46,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 09:15:46,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 09:15:46,238 INFO L87 Difference]: Start difference. First operand has 86 states, 78 states have (on average 1.8974358974358974) internal successors, (148), 79 states have internal predecessors, (148), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 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 09:15:46,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:15:46,537 INFO L93 Difference]: Finished difference Result 246 states and 454 transitions. [2023-04-01 09:15:46,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 09:15:46,539 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 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 77 [2023-04-01 09:15:46,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:15:46,546 INFO L225 Difference]: With dead ends: 246 [2023-04-01 09:15:46,546 INFO L226 Difference]: Without dead ends: 157 [2023-04-01 09:15:46,548 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 09:15:46,550 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 26 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 09:15:46,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 36 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 09:15:46,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-04-01 09:15:46,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2023-04-01 09:15:46,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 149 states have (on average 1.8523489932885906) internal successors, (276), 149 states have internal predecessors, (276), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 09:15:46,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 285 transitions. [2023-04-01 09:15:46,586 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 285 transitions. Word has length 77 [2023-04-01 09:15:46,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:15:46,587 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 285 transitions. [2023-04-01 09:15:46,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 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 09:15:46,587 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 285 transitions. [2023-04-01 09:15:46,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-01 09:15:46,589 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:15:46,590 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 09:15:46,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 09:15:46,590 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:15:46,590 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:15:46,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1425749142, now seen corresponding path program 1 times [2023-04-01 09:15:46,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:15:46,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287154845] [2023-04-01 09:15:46,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:15:46,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:15:46,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:15:46,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:15:46,835 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:15:46,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287154845] [2023-04-01 09:15:46,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287154845] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:15:46,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:15:46,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:15:46,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114858750] [2023-04-01 09:15:46,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:15:46,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:15:46,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:15:46,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:15:46,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:15:46,839 INFO L87 Difference]: Start difference. First operand 157 states and 285 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 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 09:15:47,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:15:47,162 INFO L93 Difference]: Finished difference Result 479 states and 888 transitions. [2023-04-01 09:15:47,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 09:15:47,163 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 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 86 [2023-04-01 09:15:47,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:15:47,170 INFO L225 Difference]: With dead ends: 479 [2023-04-01 09:15:47,170 INFO L226 Difference]: Without dead ends: 327 [2023-04-01 09:15:47,176 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 09:15:47,178 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 354 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 09:15:47,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 42 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 09:15:47,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2023-04-01 09:15:47,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 317. [2023-04-01 09:15:47,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 300 states have (on average 1.7266666666666666) internal successors, (518), 305 states have internal predecessors, (518), 6 states have call successors, (6), 6 states have call predecessors, (6), 10 states have return successors, (23), 5 states have call predecessors, (23), 5 states have call successors, (23) [2023-04-01 09:15:47,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 547 transitions. [2023-04-01 09:15:47,208 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 547 transitions. Word has length 86 [2023-04-01 09:15:47,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:15:47,209 INFO L495 AbstractCegarLoop]: Abstraction has 317 states and 547 transitions. [2023-04-01 09:15:47,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 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 09:15:47,209 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 547 transitions. [2023-04-01 09:15:47,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-04-01 09:15:47,212 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:15:47,212 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 09:15:47,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 09:15:47,212 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:15:47,213 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:15:47,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1087965122, now seen corresponding path program 1 times [2023-04-01 09:15:47,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:15:47,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780292395] [2023-04-01 09:15:47,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:15:47,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:15:47,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:15:47,574 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:15:47,574 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:15:47,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780292395] [2023-04-01 09:15:47,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780292395] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:15:47,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:15:47,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:15:47,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121702387] [2023-04-01 09:15:47,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:15:47,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:15:47,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:15:47,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:15:47,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:15:47,576 INFO L87 Difference]: Start difference. First operand 317 states and 547 transitions. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 4 states have internal predecessors, (90), 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 09:15:47,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:15:47,967 INFO L93 Difference]: Finished difference Result 884 states and 1556 transitions. [2023-04-01 09:15:47,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 09:15:47,968 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 4 states have internal predecessors, (90), 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 96 [2023-04-01 09:15:47,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:15:47,971 INFO L225 Difference]: With dead ends: 884 [2023-04-01 09:15:47,971 INFO L226 Difference]: Without dead ends: 572 [2023-04-01 09:15:47,972 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 09:15:47,973 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 208 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 09:15:47,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 51 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 09:15:47,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2023-04-01 09:15:47,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 564. [2023-04-01 09:15:47,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 530 states have (on average 1.5132075471698114) internal successors, (802), 546 states have internal predecessors, (802), 9 states have call successors, (9), 9 states have call predecessors, (9), 24 states have return successors, (69), 8 states have call predecessors, (69), 8 states have call successors, (69) [2023-04-01 09:15:48,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 880 transitions. [2023-04-01 09:15:48,002 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 880 transitions. Word has length 96 [2023-04-01 09:15:48,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:15:48,002 INFO L495 AbstractCegarLoop]: Abstraction has 564 states and 880 transitions. [2023-04-01 09:15:48,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 4 states have internal predecessors, (90), 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 09:15:48,002 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 880 transitions. [2023-04-01 09:15:48,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-04-01 09:15:48,006 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:15:48,006 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 09:15:48,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 09:15:48,006 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:15:48,007 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:15:48,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1574031662, now seen corresponding path program 1 times [2023-04-01 09:15:48,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:15:48,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896755610] [2023-04-01 09:15:48,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:15:48,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:15:48,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:15:48,123 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:15:48,123 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:15:48,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896755610] [2023-04-01 09:15:48,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896755610] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:15:48,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921192060] [2023-04-01 09:15:48,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:15:48,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:15:48,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:15:48,127 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:15:48,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 09:15:48,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:15:48,247 INFO L262 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 09:15:48,254 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:15:48,370 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:15:48,370 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:15:48,507 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:15:48,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921192060] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:15:48,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [520838348] [2023-04-01 09:15:48,554 INFO L159 IcfgInterpreter]: Started Sifa with 81 locations of interest [2023-04-01 09:15:48,554 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:15:48,556 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:15:48,560 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:15:48,560 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:15:48,975 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 104 for LOIs [2023-04-01 09:16:15,223 WARN L223 SmtUtils]: Spent 20.09s on a formula simplification. DAG size of input: 1232 DAG size of output: 1230 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)