/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_label53.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 09:17:06,483 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 09:17:06,485 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 09:17:06,520 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 09:17:06,521 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 09:17:06,522 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 09:17:06,523 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 09:17:06,524 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 09:17:06,526 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 09:17:06,530 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 09:17:06,530 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 09:17:06,531 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 09:17:06,531 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 09:17:06,532 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 09:17:06,533 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 09:17:06,534 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 09:17:06,534 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 09:17:06,535 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 09:17:06,536 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 09:17:06,537 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 09:17:06,538 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 09:17:06,542 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 09:17:06,544 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 09:17:06,546 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 09:17:06,558 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 09:17:06,558 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 09:17:06,558 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 09:17:06,559 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 09:17:06,560 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 09:17:06,560 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 09:17:06,561 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 09:17:06,561 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 09:17:06,562 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 09:17:06,562 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 09:17:06,563 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 09:17:06,563 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 09:17:06,564 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 09:17:06,564 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 09:17:06,564 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 09:17:06,565 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 09:17:06,565 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 09:17:06,570 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 09:17:06,596 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 09:17:06,597 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 09:17:06,597 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 09:17:06,598 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 09:17:06,598 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 09:17:06,598 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 09:17:06,599 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 09:17:06,599 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 09:17:06,599 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 09:17:06,599 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 09:17:06,600 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 09:17:06,600 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 09:17:06,600 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 09:17:06,600 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 09:17:06,600 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 09:17:06,600 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 09:17:06,600 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 09:17:06,600 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 09:17:06,601 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 09:17:06,601 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 09:17:06,601 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 09:17:06,601 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 09:17:06,601 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 09:17:06,601 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 09:17:06,602 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 09:17:06,602 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 09:17:06,602 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 09:17:06,602 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 09:17:06,602 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 09:17:06,602 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 09:17:06,602 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 09:17:06,602 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 09:17:06,603 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:17:06,603 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 09:17:06,603 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 09:17:06,603 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 09:17:06,603 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 09:17:06,603 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 09:17:06,603 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 09:17:06,604 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 09:17:06,604 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 09:17:06,604 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 09:17:06,822 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 09:17:06,845 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 09:17:06,847 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 09:17:06,848 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 09:17:06,849 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 09:17:06,850 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem01_label53.c [2023-04-01 09:17:08,041 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 09:17:08,314 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 09:17:08,315 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem01_label53.c [2023-04-01 09:17:08,326 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5af749a62/1e52f4b0625746698d080886ecd22086/FLAG4d9a3a274 [2023-04-01 09:17:08,345 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5af749a62/1e52f4b0625746698d080886ecd22086 [2023-04-01 09:17:08,347 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 09:17:08,349 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 09:17:08,352 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 09:17:08,352 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 09:17:08,355 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 09:17:08,356 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:17:08" (1/1) ... [2023-04-01 09:17:08,357 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a3e75cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:17:08, skipping insertion in model container [2023-04-01 09:17:08,358 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:17:08" (1/1) ... [2023-04-01 09:17:08,364 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 09:17:08,407 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 09:17:08,645 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_label53.c[19724,19737] [2023-04-01 09:17:08,679 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:17:08,706 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 09:17:08,811 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_label53.c[19724,19737] [2023-04-01 09:17:08,819 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:17:08,833 INFO L208 MainTranslator]: Completed translation [2023-04-01 09:17:08,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:17:08 WrapperNode [2023-04-01 09:17:08,834 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 09:17:08,836 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 09:17:08,836 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 09:17:08,836 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 09:17:08,847 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:17:08" (1/1) ... [2023-04-01 09:17:08,847 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:17:08" (1/1) ... [2023-04-01 09:17:08,864 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:17:08" (1/1) ... [2023-04-01 09:17:08,864 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:17:08" (1/1) ... [2023-04-01 09:17:08,901 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:17:08" (1/1) ... [2023-04-01 09:17:08,927 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:17:08" (1/1) ... [2023-04-01 09:17:08,930 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:17:08" (1/1) ... [2023-04-01 09:17:08,934 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:17:08" (1/1) ... [2023-04-01 09:17:08,947 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 09:17:08,948 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 09:17:08,948 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 09:17:08,949 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 09:17:08,949 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:17:08" (1/1) ... [2023-04-01 09:17:08,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:17:08,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:17:08,985 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 09:17:09,009 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 09:17:09,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 09:17:09,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 09:17:09,026 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 09:17:09,027 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 09:17:09,027 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 09:17:09,027 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 09:17:09,027 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 09:17:09,027 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 09:17:09,027 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 09:17:09,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 09:17:09,027 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 09:17:09,028 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 09:17:09,028 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 09:17:09,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 09:17:09,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 09:17:09,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 09:17:09,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 09:17:09,028 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 09:17:09,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 09:17:09,123 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 09:17:09,125 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 09:17:09,949 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 09:17:10,125 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 09:17:10,125 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 09:17:10,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:17:10 BoogieIcfgContainer [2023-04-01 09:17:10,129 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 09:17:10,131 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 09:17:10,131 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 09:17:10,134 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 09:17:10,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 09:17:08" (1/3) ... [2023-04-01 09:17:10,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12909d6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:17:10, skipping insertion in model container [2023-04-01 09:17:10,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:17:08" (2/3) ... [2023-04-01 09:17:10,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12909d6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:17:10, skipping insertion in model container [2023-04-01 09:17:10,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:17:10" (3/3) ... [2023-04-01 09:17:10,136 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem01_label53.c [2023-04-01 09:17:10,152 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 09:17:10,153 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 09:17:10,211 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 09:17:10,239 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;@1f74dbad, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 09:17:10,239 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 09:17:10,243 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 09:17:10,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-04-01 09:17:10,254 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:17:10,254 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 09:17:10,255 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:17:10,260 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:17:10,261 INFO L85 PathProgramCache]: Analyzing trace with hash -2062134046, now seen corresponding path program 1 times [2023-04-01 09:17:10,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:17:10,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651031324] [2023-04-01 09:17:10,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:17:10,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:17:10,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:17:10,932 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 09:17:10,932 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:17:10,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651031324] [2023-04-01 09:17:10,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651031324] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:17:10,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:17:10,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 09:17:10,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954909397] [2023-04-01 09:17:10,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:17:10,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 09:17:10,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:17:10,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 09:17:10,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 09:17:10,989 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 09:17:11,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:17:11,396 INFO L93 Difference]: Finished difference Result 246 states and 454 transitions. [2023-04-01 09:17:11,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 09:17:11,398 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 09:17:11,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:17:11,407 INFO L225 Difference]: With dead ends: 246 [2023-04-01 09:17:11,408 INFO L226 Difference]: Without dead ends: 157 [2023-04-01 09:17:11,410 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 09:17:11,413 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 20 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 09:17:11,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 42 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 09:17:11,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-04-01 09:17:11,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2023-04-01 09:17:11,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 149 states have (on average 1.8120805369127517) internal successors, (270), 149 states have internal predecessors, (270), 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 09:17:11,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 279 transitions. [2023-04-01 09:17:11,457 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 279 transitions. Word has length 77 [2023-04-01 09:17:11,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:17:11,457 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 279 transitions. [2023-04-01 09:17:11,458 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 09:17:11,458 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 279 transitions. [2023-04-01 09:17:11,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-04-01 09:17:11,461 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:17:11,461 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:17:11,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 09:17:11,462 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:17:11,462 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:17:11,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1470129468, now seen corresponding path program 1 times [2023-04-01 09:17:11,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:17:11,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595528830] [2023-04-01 09:17:11,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:17:11,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:17:11,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:17:11,709 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:17:11,709 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:17:11,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595528830] [2023-04-01 09:17:11,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595528830] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:17:11,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:17:11,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:17:11,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936814918] [2023-04-01 09:17:11,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:17:11,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:17:11,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:17:11,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:17:11,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:17:11,713 INFO L87 Difference]: Start difference. First operand 157 states and 279 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 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 09:17:12,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:17:12,151 INFO L93 Difference]: Finished difference Result 402 states and 725 transitions. [2023-04-01 09:17:12,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 09:17:12,152 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 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 87 [2023-04-01 09:17:12,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:17:12,159 INFO L225 Difference]: With dead ends: 402 [2023-04-01 09:17:12,159 INFO L226 Difference]: Without dead ends: 250 [2023-04-01 09:17:12,162 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 09:17:12,163 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 261 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 09:17:12,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 43 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 09:17:12,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2023-04-01 09:17:12,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 238. [2023-04-01 09:17:12,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 225 states have (on average 1.7244444444444444) internal successors, (388), 228 states have internal predecessors, (388), 5 states have call successors, (5), 5 states have call predecessors, (5), 7 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2023-04-01 09:17:12,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 407 transitions. [2023-04-01 09:17:12,201 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 407 transitions. Word has length 87 [2023-04-01 09:17:12,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:17:12,204 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 407 transitions. [2023-04-01 09:17:12,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 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 09:17:12,204 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 407 transitions. [2023-04-01 09:17:12,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-04-01 09:17:12,209 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:17:12,209 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:17:12,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 09:17:12,210 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:17:12,210 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:17:12,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1308825646, now seen corresponding path program 1 times [2023-04-01 09:17:12,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:17:12,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195808997] [2023-04-01 09:17:12,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:17:12,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:17:12,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:17:13,036 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:17:13,036 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:17:13,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195808997] [2023-04-01 09:17:13,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195808997] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:17:13,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772093081] [2023-04-01 09:17:13,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:17:13,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:17:13,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:17:13,041 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 09:17:13,060 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 09:17:13,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:17:13,158 INFO L262 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 09:17:13,165 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:17:13,318 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:17:13,318 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 09:17:13,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772093081] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:17:13,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 09:17:13,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-01 09:17:13,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691708362] [2023-04-01 09:17:13,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:17:13,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 09:17:13,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:17:13,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 09:17:13,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-01 09:17:13,324 INFO L87 Difference]: Start difference. First operand 238 states and 407 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:17:13,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:17:13,597 INFO L93 Difference]: Finished difference Result 700 states and 1242 transitions. [2023-04-01 09:17:13,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 09:17:13,598 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 88 [2023-04-01 09:17:13,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:17:13,601 INFO L225 Difference]: With dead ends: 700 [2023-04-01 09:17:13,601 INFO L226 Difference]: Without dead ends: 467 [2023-04-01 09:17:13,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-01 09:17:13,603 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 2 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 09:17:13,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 166 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 09:17:13,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2023-04-01 09:17:13,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 467. [2023-04-01 09:17:13,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 446 states have (on average 1.5269058295964126) internal successors, (681), 451 states have internal predecessors, (681), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (48), 7 states have call predecessors, (48), 7 states have call successors, (48) [2023-04-01 09:17:13,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 737 transitions. [2023-04-01 09:17:13,646 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 737 transitions. Word has length 88 [2023-04-01 09:17:13,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:17:13,646 INFO L495 AbstractCegarLoop]: Abstraction has 467 states and 737 transitions. [2023-04-01 09:17:13,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:17:13,647 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 737 transitions. [2023-04-01 09:17:13,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-04-01 09:17:13,650 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:17:13,650 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:17:13,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 09:17:13,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:17:13,858 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:17:13,858 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:17:13,859 INFO L85 PathProgramCache]: Analyzing trace with hash -2050464122, now seen corresponding path program 1 times [2023-04-01 09:17:13,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:17:13,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151294223] [2023-04-01 09:17:13,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:17:13,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:17:13,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:17:14,175 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:17:14,176 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:17:14,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151294223] [2023-04-01 09:17:14,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151294223] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:17:14,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:17:14,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:17:14,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52776685] [2023-04-01 09:17:14,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:17:14,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:17:14,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:17:14,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:17:14,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:17:14,182 INFO L87 Difference]: Start difference. First operand 467 states and 737 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 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 09:17:14,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:17:14,603 INFO L93 Difference]: Finished difference Result 1358 states and 2246 transitions. [2023-04-01 09:17:14,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 09:17:14,605 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 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 94 [2023-04-01 09:17:14,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:17:14,610 INFO L225 Difference]: With dead ends: 1358 [2023-04-01 09:17:14,610 INFO L226 Difference]: Without dead ends: 730 [2023-04-01 09:17:14,612 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 09:17:14,617 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 241 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 09:17:14,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 49 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 09:17:14,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2023-04-01 09:17:14,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 643. [2023-04-01 09:17:14,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 605 states have (on average 1.3305785123966942) internal successors, (805), 623 states have internal predecessors, (805), 10 states have call successors, (10), 10 states have call predecessors, (10), 27 states have return successors, (88), 9 states have call predecessors, (88), 9 states have call successors, (88) [2023-04-01 09:17:14,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 903 transitions. [2023-04-01 09:17:14,657 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 903 transitions. Word has length 94 [2023-04-01 09:17:14,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:17:14,657 INFO L495 AbstractCegarLoop]: Abstraction has 643 states and 903 transitions. [2023-04-01 09:17:14,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 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 09:17:14,658 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 903 transitions. [2023-04-01 09:17:14,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-04-01 09:17:14,668 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:17:14,668 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:17:14,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 09:17:14,669 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:17:14,669 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:17:14,669 INFO L85 PathProgramCache]: Analyzing trace with hash 144095334, now seen corresponding path program 1 times [2023-04-01 09:17:14,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:17:14,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629554164] [2023-04-01 09:17:14,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:17:14,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:17:14,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:17:15,057 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:17:15,057 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:17:15,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629554164] [2023-04-01 09:17:15,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629554164] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:17:15,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:17:15,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:17:15,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767776741] [2023-04-01 09:17:15,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:17:15,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:17:15,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:17:15,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:17:15,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:17:15,066 INFO L87 Difference]: Start difference. First operand 643 states and 903 transitions. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 4 states have internal predecessors, (104), 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 09:17:15,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:17:15,423 INFO L93 Difference]: Finished difference Result 1384 states and 1984 transitions. [2023-04-01 09:17:15,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 09:17:15,425 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 4 states have internal predecessors, (104), 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 110 [2023-04-01 09:17:15,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:17:15,430 INFO L225 Difference]: With dead ends: 1384 [2023-04-01 09:17:15,430 INFO L226 Difference]: Without dead ends: 746 [2023-04-01 09:17:15,431 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 09:17:15,432 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 180 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 09:17:15,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 46 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 09:17:15,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2023-04-01 09:17:15,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 736. [2023-04-01 09:17:15,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 687 states have (on average 1.2954876273653566) internal successors, (890), 714 states have internal predecessors, (890), 11 states have call successors, (11), 11 states have call predecessors, (11), 37 states have return successors, (126), 10 states have call predecessors, (126), 10 states have call successors, (126) [2023-04-01 09:17:15,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 1027 transitions. [2023-04-01 09:17:15,462 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 1027 transitions. Word has length 110 [2023-04-01 09:17:15,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:17:15,463 INFO L495 AbstractCegarLoop]: Abstraction has 736 states and 1027 transitions. [2023-04-01 09:17:15,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 4 states have internal predecessors, (104), 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 09:17:15,463 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 1027 transitions. [2023-04-01 09:17:15,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-04-01 09:17:15,465 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:17:15,465 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:17:15,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 09:17:15,466 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:17:15,467 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:17:15,467 INFO L85 PathProgramCache]: Analyzing trace with hash 338350226, now seen corresponding path program 1 times [2023-04-01 09:17:15,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:17:15,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114868661] [2023-04-01 09:17:15,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:17:15,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:17:15,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:17:15,747 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 67 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:17:15,747 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:17:15,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114868661] [2023-04-01 09:17:15,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114868661] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:17:15,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000824059] [2023-04-01 09:17:15,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:17:15,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:17:15,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:17:15,749 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:17:15,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 09:17:15,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:17:15,874 INFO L262 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 09:17:15,881 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:17:15,978 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 09:17:15,978 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 09:17:15,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000824059] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:17:15,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 09:17:15,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 09:17:15,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476593127] [2023-04-01 09:17:15,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:17:15,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 09:17:15,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:17:15,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 09:17:15,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 09:17:15,980 INFO L87 Difference]: Start difference. First operand 736 states and 1027 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 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 09:17:16,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:17:16,206 INFO L93 Difference]: Finished difference Result 1548 states and 2174 transitions. [2023-04-01 09:17:16,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 09:17:16,207 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 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 135 [2023-04-01 09:17:16,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:17:16,212 INFO L225 Difference]: With dead ends: 1548 [2023-04-01 09:17:16,212 INFO L226 Difference]: Without dead ends: 817 [2023-04-01 09:17:16,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 09:17:16,214 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 6 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 09:17:16,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 113 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 09:17:16,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2023-04-01 09:17:16,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 817. [2023-04-01 09:17:16,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 763 states have (on average 1.2319790301441678) internal successors, (940), 793 states have internal predecessors, (940), 12 states have call successors, (12), 12 states have call predecessors, (12), 41 states have return successors, (124), 11 states have call predecessors, (124), 11 states have call successors, (124) [2023-04-01 09:17:16,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 1076 transitions. [2023-04-01 09:17:16,242 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 1076 transitions. Word has length 135 [2023-04-01 09:17:16,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:17:16,244 INFO L495 AbstractCegarLoop]: Abstraction has 817 states and 1076 transitions. [2023-04-01 09:17:16,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 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 09:17:16,244 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 1076 transitions. [2023-04-01 09:17:16,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-04-01 09:17:16,247 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:17:16,247 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:17:16,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 09:17:16,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-04-01 09:17:16,460 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:17:16,460 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:17:16,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1190802800, now seen corresponding path program 1 times [2023-04-01 09:17:16,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:17:16,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531815699] [2023-04-01 09:17:16,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:17:16,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:17:16,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:17:16,615 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 85 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:17:16,615 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:17:16,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531815699] [2023-04-01 09:17:16,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531815699] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:17:16,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286522321] [2023-04-01 09:17:16,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:17:16,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:17:16,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:17:16,617 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:17:16,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 09:17:16,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:17:16,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 09:17:16,756 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:17:16,846 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 85 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:17:16,846 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:17:16,963 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 85 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:17:16,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286522321] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:17:16,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [663826093] [2023-04-01 09:17:17,010 INFO L159 IcfgInterpreter]: Started Sifa with 81 locations of interest [2023-04-01 09:17:17,010 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:17:17,013 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:17:17,017 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:17:17,017 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:17:17,460 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 104 for LOIs [2023-04-01 09:17:42,888 WARN L223 SmtUtils]: Spent 19.61s 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)