/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/eca-rers2012/Problem02_label42.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 03:18:07,990 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 03:18:07,992 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 03:18:08,026 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 03:18:08,026 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 03:18:08,029 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 03:18:08,032 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 03:18:08,033 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 03:18:08,034 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 03:18:08,039 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 03:18:08,040 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 03:18:08,041 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 03:18:08,042 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 03:18:08,044 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 03:18:08,045 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 03:18:08,046 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 03:18:08,047 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 03:18:08,047 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 03:18:08,049 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 03:18:08,052 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 03:18:08,053 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 03:18:08,055 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 03:18:08,055 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 03:18:08,056 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 03:18:08,060 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 03:18:08,060 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 03:18:08,060 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 03:18:08,061 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 03:18:08,061 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 03:18:08,062 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 03:18:08,062 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 03:18:08,062 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 03:18:08,063 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 03:18:08,064 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 03:18:08,065 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 03:18:08,065 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 03:18:08,066 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 03:18:08,066 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 03:18:08,066 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 03:18:08,067 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 03:18:08,067 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 03:18:08,068 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 03:18:08,094 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 03:18:08,094 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 03:18:08,095 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 03:18:08,095 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 03:18:08,096 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 03:18:08,096 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 03:18:08,096 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 03:18:08,096 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 03:18:08,096 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 03:18:08,096 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 03:18:08,097 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 03:18:08,097 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 03:18:08,097 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 03:18:08,097 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 03:18:08,097 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 03:18:08,097 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 03:18:08,097 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 03:18:08,098 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 03:18:08,098 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 03:18:08,098 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 03:18:08,098 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 03:18:08,098 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 03:18:08,098 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 03:18:08,099 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 03:18:08,099 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 03:18:08,099 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 03:18:08,099 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 03:18:08,099 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 03:18:08,099 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 03:18:08,099 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 03:18:08,099 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 03:18:08,100 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 03:18:08,100 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:18:08,100 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 03:18:08,100 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 03:18:08,100 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 03:18:08,100 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 03:18:08,100 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 03:18:08,100 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 03:18:08,100 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 03:18:08,100 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 03:18:08,101 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 03:18:08,282 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 03:18:08,299 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 03:18:08,301 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 03:18:08,302 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 03:18:08,303 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 03:18:08,303 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem02_label42.c [2023-04-01 03:18:09,266 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 03:18:09,523 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 03:18:09,524 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem02_label42.c [2023-04-01 03:18:09,533 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7c350f7b/2e92f0518a084a9cb14babfc578c7e13/FLAGae5e938b2 [2023-04-01 03:18:09,906 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7c350f7b/2e92f0518a084a9cb14babfc578c7e13 [2023-04-01 03:18:09,908 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 03:18:09,909 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 03:18:09,909 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 03:18:09,909 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 03:18:09,913 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 03:18:09,914 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:18:09" (1/1) ... [2023-04-01 03:18:09,914 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c7e891e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:18:09, skipping insertion in model container [2023-04-01 03:18:09,914 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:18:09" (1/1) ... [2023-04-01 03:18:09,919 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 03:18:09,955 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 03:18:10,168 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/Problem02_label42.c[16787,16800] [2023-04-01 03:18:10,197 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:18:10,211 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 03:18:10,294 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/Problem02_label42.c[16787,16800] [2023-04-01 03:18:10,303 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:18:10,315 INFO L208 MainTranslator]: Completed translation [2023-04-01 03:18:10,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:18:10 WrapperNode [2023-04-01 03:18:10,316 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 03:18:10,316 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 03:18:10,316 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 03:18:10,317 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 03:18:10,324 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:18:10" (1/1) ... [2023-04-01 03:18:10,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:18:10" (1/1) ... [2023-04-01 03:18:10,336 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:18:10" (1/1) ... [2023-04-01 03:18:10,336 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:18:10" (1/1) ... [2023-04-01 03:18:10,361 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:18:10" (1/1) ... [2023-04-01 03:18:10,369 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:18:10" (1/1) ... [2023-04-01 03:18:10,374 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:18:10" (1/1) ... [2023-04-01 03:18:10,376 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:18:10" (1/1) ... [2023-04-01 03:18:10,381 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 03:18:10,382 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 03:18:10,382 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 03:18:10,382 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 03:18:10,383 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:18:10" (1/1) ... [2023-04-01 03:18:10,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:18:10,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:18:10,422 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 03:18:10,442 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 03:18:10,453 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 03:18:10,453 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 03:18:10,453 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 03:18:10,453 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 03:18:10,453 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 03:18:10,453 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 03:18:10,453 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 03:18:10,454 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 03:18:10,454 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 03:18:10,454 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 03:18:10,454 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 03:18:10,454 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 03:18:10,454 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 03:18:10,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 03:18:10,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 03:18:10,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 03:18:10,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 03:18:10,454 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 03:18:10,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 03:18:10,513 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 03:18:10,514 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 03:18:11,265 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 03:18:11,446 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 03:18:11,446 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 03:18:11,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:18:11 BoogieIcfgContainer [2023-04-01 03:18:11,449 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 03:18:11,451 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 03:18:11,451 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 03:18:11,453 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 03:18:11,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 03:18:09" (1/3) ... [2023-04-01 03:18:11,453 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d5de883 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:18:11, skipping insertion in model container [2023-04-01 03:18:11,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:18:10" (2/3) ... [2023-04-01 03:18:11,454 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d5de883 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:18:11, skipping insertion in model container [2023-04-01 03:18:11,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:18:11" (3/3) ... [2023-04-01 03:18:11,455 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem02_label42.c [2023-04-01 03:18:11,466 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 03:18:11,467 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 03:18:11,507 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 03:18:11,512 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;@6f9cdc35, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 03:18:11,512 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 03:18:11,515 INFO L276 IsEmpty]: Start isEmpty. Operand has 95 states, 87 states have (on average 1.9080459770114941) internal successors, (166), 88 states have internal predecessors, (166), 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 03:18:11,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-01 03:18:11,523 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:18:11,523 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:18:11,524 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:18:11,527 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:18:11,527 INFO L85 PathProgramCache]: Analyzing trace with hash -818169769, now seen corresponding path program 1 times [2023-04-01 03:18:11,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:18:11,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999982040] [2023-04-01 03:18:11,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:18:11,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:18:11,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:18:11,979 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 03:18:11,980 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:18:11,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999982040] [2023-04-01 03:18:11,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999982040] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:18:11,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:18:11,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 03:18:11,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420506490] [2023-04-01 03:18:11,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:18:11,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 03:18:11,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:18:12,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 03:18:12,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 03:18:12,013 INFO L87 Difference]: Start difference. First operand has 95 states, 87 states have (on average 1.9080459770114941) internal successors, (166), 88 states have internal predecessors, (166), 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 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 03:18:12,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:18:12,371 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2023-04-01 03:18:12,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 03:18:12,373 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 86 [2023-04-01 03:18:12,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:18:12,384 INFO L225 Difference]: With dead ends: 273 [2023-04-01 03:18:12,385 INFO L226 Difference]: Without dead ends: 175 [2023-04-01 03:18:12,388 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 03:18:12,391 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 27 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 03:18:12,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 39 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 03:18:12,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-04-01 03:18:12,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2023-04-01 03:18:12,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 167 states have (on average 1.844311377245509) internal successors, (308), 167 states have internal predecessors, (308), 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 03:18:12,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 317 transitions. [2023-04-01 03:18:12,438 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 317 transitions. Word has length 86 [2023-04-01 03:18:12,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:18:12,439 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 317 transitions. [2023-04-01 03:18:12,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 03:18:12,439 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 317 transitions. [2023-04-01 03:18:12,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-04-01 03:18:12,444 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:18:12,444 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:18:12,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 03:18:12,444 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:18:12,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:18:12,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1950720787, now seen corresponding path program 1 times [2023-04-01 03:18:12,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:18:12,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909129085] [2023-04-01 03:18:12,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:18:12,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:18:12,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:18:12,833 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:18:12,833 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:18:12,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909129085] [2023-04-01 03:18:12,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909129085] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:18:12,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:18:12,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 03:18:12,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8849788] [2023-04-01 03:18:12,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:18:12,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:18:12,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:18:12,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:18:12,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:18:12,838 INFO L87 Difference]: Start difference. First operand 175 states and 317 transitions. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 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 03:18:13,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:18:13,200 INFO L93 Difference]: Finished difference Result 539 states and 996 transitions. [2023-04-01 03:18:13,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 03:18:13,205 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 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 104 [2023-04-01 03:18:13,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:18:13,211 INFO L225 Difference]: With dead ends: 539 [2023-04-01 03:18:13,212 INFO L226 Difference]: Without dead ends: 369 [2023-04-01 03:18:13,218 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 03:18:13,220 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 271 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 03:18:13,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 46 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 03:18:13,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2023-04-01 03:18:13,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 271. [2023-04-01 03:18:13,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 255 states have (on average 1.768627450980392) internal successors, (451), 261 states have internal predecessors, (451), 5 states have call successors, (5), 5 states have call predecessors, (5), 10 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2023-04-01 03:18:13,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 475 transitions. [2023-04-01 03:18:13,262 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 475 transitions. Word has length 104 [2023-04-01 03:18:13,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:18:13,263 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 475 transitions. [2023-04-01 03:18:13,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 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 03:18:13,263 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 475 transitions. [2023-04-01 03:18:13,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-04-01 03:18:13,266 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:18:13,266 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:18:13,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 03:18:13,266 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:18:13,267 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:18:13,267 INFO L85 PathProgramCache]: Analyzing trace with hash 978676200, now seen corresponding path program 1 times [2023-04-01 03:18:13,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:18:13,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965375211] [2023-04-01 03:18:13,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:18:13,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:18:13,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:18:13,432 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 03:18:13,432 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:18:13,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965375211] [2023-04-01 03:18:13,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965375211] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:18:13,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:18:13,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 03:18:13,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346895504] [2023-04-01 03:18:13,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:18:13,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:18:13,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:18:13,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:18:13,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:18:13,434 INFO L87 Difference]: Start difference. First operand 271 states and 475 transitions. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 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 03:18:13,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:18:13,752 INFO L93 Difference]: Finished difference Result 833 states and 1544 transitions. [2023-04-01 03:18:13,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 03:18:13,753 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 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 105 [2023-04-01 03:18:13,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:18:13,756 INFO L225 Difference]: With dead ends: 833 [2023-04-01 03:18:13,756 INFO L226 Difference]: Without dead ends: 567 [2023-04-01 03:18:13,759 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 03:18:13,763 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 346 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 03:18:13,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 42 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 03:18:13,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2023-04-01 03:18:13,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 549. [2023-04-01 03:18:13,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 514 states have (on average 1.6264591439688716) internal successors, (836), 533 states have internal predecessors, (836), 8 states have call successors, (8), 8 states have call predecessors, (8), 26 states have return successors, (82), 7 states have call predecessors, (82), 7 states have call successors, (82) [2023-04-01 03:18:13,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 926 transitions. [2023-04-01 03:18:13,796 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 926 transitions. Word has length 105 [2023-04-01 03:18:13,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:18:13,796 INFO L495 AbstractCegarLoop]: Abstraction has 549 states and 926 transitions. [2023-04-01 03:18:13,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 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 03:18:13,802 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 926 transitions. [2023-04-01 03:18:13,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-04-01 03:18:13,807 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:18:13,808 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, 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] [2023-04-01 03:18:13,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 03:18:13,808 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:18:13,808 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:18:13,809 INFO L85 PathProgramCache]: Analyzing trace with hash 76748722, now seen corresponding path program 1 times [2023-04-01 03:18:13,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:18:13,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239240608] [2023-04-01 03:18:13,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:18:13,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:18:13,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:18:13,989 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:18:13,989 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:18:13,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239240608] [2023-04-01 03:18:13,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239240608] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:18:13,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:18:13,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 03:18:13,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014047610] [2023-04-01 03:18:13,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:18:13,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:18:13,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:18:13,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:18:13,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:18:13,992 INFO L87 Difference]: Start difference. First operand 549 states and 926 transitions. Second operand has 5 states, 5 states have (on average 23.4) internal successors, (117), 4 states have internal predecessors, (117), 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 03:18:14,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:18:14,182 INFO L93 Difference]: Finished difference Result 1119 states and 2049 transitions. [2023-04-01 03:18:14,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 03:18:14,183 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.4) internal successors, (117), 4 states have internal predecessors, (117), 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 123 [2023-04-01 03:18:14,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:18:14,187 INFO L225 Difference]: With dead ends: 1119 [2023-04-01 03:18:14,187 INFO L226 Difference]: Without dead ends: 575 [2023-04-01 03:18:14,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 03:18:14,194 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 246 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 03:18:14,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 24 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 03:18:14,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2023-04-01 03:18:14,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 543. [2023-04-01 03:18:14,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 511 states have (on average 1.4931506849315068) internal successors, (763), 527 states have internal predecessors, (763), 8 states have call successors, (8), 8 states have call predecessors, (8), 23 states have return successors, (70), 7 states have call predecessors, (70), 7 states have call successors, (70) [2023-04-01 03:18:14,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 841 transitions. [2023-04-01 03:18:14,226 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 841 transitions. Word has length 123 [2023-04-01 03:18:14,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:18:14,227 INFO L495 AbstractCegarLoop]: Abstraction has 543 states and 841 transitions. [2023-04-01 03:18:14,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.4) internal successors, (117), 4 states have internal predecessors, (117), 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 03:18:14,228 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 841 transitions. [2023-04-01 03:18:14,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-04-01 03:18:14,234 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:18:14,234 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:18:14,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 03:18:14,234 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:18:14,235 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:18:14,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1622252082, now seen corresponding path program 1 times [2023-04-01 03:18:14,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:18:14,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583619019] [2023-04-01 03:18:14,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:18:14,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:18:14,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:18:14,432 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 40 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 03:18:14,432 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:18:14,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583619019] [2023-04-01 03:18:14,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583619019] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:18:14,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296313979] [2023-04-01 03:18:14,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:18:14,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:18:14,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:18:14,436 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 03:18:14,461 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 03:18:14,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:18:14,560 INFO L262 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 03:18:14,568 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:18:14,673 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 03:18:14,674 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 03:18:14,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296313979] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:18:14,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 03:18:14,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 03:18:14,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514038295] [2023-04-01 03:18:14,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:18:14,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:18:14,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:18:14,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:18:14,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 03:18:14,676 INFO L87 Difference]: Start difference. First operand 543 states and 841 transitions. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 4 states have internal predecessors, (110), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 03:18:15,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:18:15,030 INFO L93 Difference]: Finished difference Result 1453 states and 2318 transitions. [2023-04-01 03:18:15,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 03:18:15,030 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 4 states have internal predecessors, (110), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 132 [2023-04-01 03:18:15,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:18:15,035 INFO L225 Difference]: With dead ends: 1453 [2023-04-01 03:18:15,035 INFO L226 Difference]: Without dead ends: 915 [2023-04-01 03:18:15,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-04-01 03:18:15,037 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 221 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 03:18:15,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 53 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 03:18:15,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2023-04-01 03:18:15,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 901. [2023-04-01 03:18:15,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 850 states have (on average 1.331764705882353) internal successors, (1132), 877 states have internal predecessors, (1132), 12 states have call successors, (12), 12 states have call predecessors, (12), 38 states have return successors, (138), 11 states have call predecessors, (138), 11 states have call successors, (138) [2023-04-01 03:18:15,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 1282 transitions. [2023-04-01 03:18:15,068 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 1282 transitions. Word has length 132 [2023-04-01 03:18:15,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:18:15,069 INFO L495 AbstractCegarLoop]: Abstraction has 901 states and 1282 transitions. [2023-04-01 03:18:15,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 4 states have internal predecessors, (110), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 03:18:15,069 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 1282 transitions. [2023-04-01 03:18:15,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-04-01 03:18:15,071 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:18:15,071 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 03:18:15,083 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 03:18:15,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:18:15,279 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:18:15,282 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:18:15,282 INFO L85 PathProgramCache]: Analyzing trace with hash 939479686, now seen corresponding path program 1 times [2023-04-01 03:18:15,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:18:15,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204002854] [2023-04-01 03:18:15,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:18:15,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:18:15,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:18:15,394 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 76 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 03:18:15,394 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:18:15,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204002854] [2023-04-01 03:18:15,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204002854] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:18:15,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441935203] [2023-04-01 03:18:15,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:18:15,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:18:15,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:18:15,396 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 03:18:15,398 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 03:18:15,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:18:15,515 INFO L262 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 03:18:15,523 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:18:15,591 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 76 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 03:18:15,591 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:18:15,688 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 76 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 03:18:15,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441935203] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:18:15,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2050466177] [2023-04-01 03:18:15,713 INFO L159 IcfgInterpreter]: Started Sifa with 90 locations of interest [2023-04-01 03:18:15,713 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:18:15,716 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:18:15,720 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:18:15,720 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:18:15,935 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 65 for LOIs