/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/eca-rers2012/Problem15_label33.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:14:45,344 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:14:45,346 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:14:45,371 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:14:45,371 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:14:45,373 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:14:45,376 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:14:45,380 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:14:45,381 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:14:45,385 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:14:45,385 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:14:45,386 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:14:45,386 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:14:45,387 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:14:45,387 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:14:45,388 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:14:45,388 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:14:45,389 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:14:45,390 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:14:45,391 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:14:45,391 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:14:45,395 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:14:45,397 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:14:45,398 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:14:45,413 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:14:45,413 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:14:45,413 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:14:45,414 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:14:45,414 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:14:45,415 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:14:45,415 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:14:45,416 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:14:45,416 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:14:45,417 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:14:45,417 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:14:45,417 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:14:45,418 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:14:45,418 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:14:45,418 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:14:45,419 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:14:45,419 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:14:45,420 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 04:14:45,449 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:14:45,450 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:14:45,450 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:14:45,450 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:14:45,451 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:14:45,451 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:14:45,451 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:14:45,451 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:14:45,451 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:14:45,452 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:14:45,452 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:14:45,452 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:14:45,453 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:14:45,453 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:14:45,453 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:14:45,453 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:14:45,453 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:14:45,453 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:14:45,454 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:14:45,454 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:14:45,454 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:14:45,454 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:14:45,454 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:14:45,454 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:14:45,454 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:14:45,455 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:14:45,455 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:14:45,455 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:14:45,455 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:14:45,455 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:14:45,455 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:14:45,456 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:14:45,456 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:14:45,456 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:14:45,456 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:14:45,456 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:14:45,456 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:14:45,456 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:14:45,456 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:14:45,457 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:14:45,457 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:14:45,457 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:14:45,675 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:14:45,699 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:14:45,701 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:14:45,702 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:14:45,703 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:14:45,704 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label33.c [2023-04-01 04:14:46,730 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:14:47,019 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:14:47,019 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label33.c [2023-04-01 04:14:47,032 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45bfd9f90/53d1196fe93145b8a9241c87065a55e0/FLAG6d5f83981 [2023-04-01 04:14:47,042 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45bfd9f90/53d1196fe93145b8a9241c87065a55e0 [2023-04-01 04:14:47,044 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:14:47,045 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:14:47,046 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:14:47,046 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:14:47,048 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:14:47,049 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:14:47" (1/1) ... [2023-04-01 04:14:47,049 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76b14a0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:14:47, skipping insertion in model container [2023-04-01 04:14:47,049 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:14:47" (1/1) ... [2023-04-01 04:14:47,054 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:14:47,099 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:14:47,247 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label33.c[2841,2854] [2023-04-01 04:14:47,670 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:14:47,681 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:14:47,705 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label33.c[2841,2854] [2023-04-01 04:14:47,830 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:14:47,844 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:14:47,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:14:47 WrapperNode [2023-04-01 04:14:47,844 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:14:47,845 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:14:47,845 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:14:47,846 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:14:47,854 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:14:47" (1/1) ... [2023-04-01 04:14:47,855 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:14:47" (1/1) ... [2023-04-01 04:14:47,888 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:14:47" (1/1) ... [2023-04-01 04:14:47,889 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:14:47" (1/1) ... [2023-04-01 04:14:47,933 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:14:47" (1/1) ... [2023-04-01 04:14:47,941 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:14:47" (1/1) ... [2023-04-01 04:14:47,960 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:14:47" (1/1) ... [2023-04-01 04:14:47,968 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:14:47" (1/1) ... [2023-04-01 04:14:47,986 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:14:47,987 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:14:47,987 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:14:47,988 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:14:47,989 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:14:47" (1/1) ... [2023-04-01 04:14:47,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:14:48,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:14:48,029 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 04:14:48,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 04:14:48,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:14:48,061 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:14:48,061 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:14:48,061 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:14:48,061 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:14:48,061 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:14:48,061 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:14:48,061 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:14:48,061 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:14:48,061 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:14:48,062 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:14:48,062 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:14:48,062 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:14:48,062 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:14:48,062 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:14:48,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:14:48,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:14:48,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:14:48,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:14:48,062 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:14:48,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:14:48,140 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:14:48,141 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:14:50,370 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:14:50,849 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:14:50,849 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:14:50,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:14:50 BoogieIcfgContainer [2023-04-01 04:14:50,852 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:14:50,853 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:14:50,853 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:14:50,856 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:14:50,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:14:47" (1/3) ... [2023-04-01 04:14:50,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@313c22a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:14:50, skipping insertion in model container [2023-04-01 04:14:50,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:14:47" (2/3) ... [2023-04-01 04:14:50,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@313c22a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:14:50, skipping insertion in model container [2023-04-01 04:14:50,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:14:50" (3/3) ... [2023-04-01 04:14:50,858 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label33.c [2023-04-01 04:14:50,873 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:14:50,874 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:14:50,929 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:14:50,934 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;@6429b938, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:14:50,935 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:14:50,954 INFO L276 IsEmpty]: Start isEmpty. Operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 04:14:50,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:14:50,959 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:14:50,960 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:14:50,960 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:14:50,964 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:14:50,964 INFO L85 PathProgramCache]: Analyzing trace with hash 271513795, now seen corresponding path program 1 times [2023-04-01 04:14:50,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:14:50,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290463033] [2023-04-01 04:14:50,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:14:50,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:14:51,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:14:51,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:14:51,264 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:14:51,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290463033] [2023-04-01 04:14:51,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290463033] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:14:51,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:14:51,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:14:51,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800913651] [2023-04-01 04:14:51,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:14:51,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:14:51,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:14:51,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:14:51,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:14:51,291 INFO L87 Difference]: Start difference. First operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:14:53,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:14:53,033 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2023-04-01 04:14:53,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:14:53,035 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 04:14:53,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:14:53,045 INFO L225 Difference]: With dead ends: 718 [2023-04-01 04:14:53,046 INFO L226 Difference]: Without dead ends: 471 [2023-04-01 04:14:53,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:14:53,053 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 235 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-04-01 04:14:53,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 110 Invalid, 957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-04-01 04:14:53,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-04-01 04:14:53,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 469. [2023-04-01 04:14:53,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 459 states have (on average 1.7712418300653594) internal successors, (813), 459 states have internal predecessors, (813), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-01 04:14:53,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 824 transitions. [2023-04-01 04:14:53,115 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 824 transitions. Word has length 11 [2023-04-01 04:14:53,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:14:53,116 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 824 transitions. [2023-04-01 04:14:53,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:14:53,116 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 824 transitions. [2023-04-01 04:14:53,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 04:14:53,117 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:14:53,117 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:14:53,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:14:53,118 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:14:53,118 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:14:53,118 INFO L85 PathProgramCache]: Analyzing trace with hash -969739392, now seen corresponding path program 1 times [2023-04-01 04:14:53,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:14:53,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887530727] [2023-04-01 04:14:53,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:14:53,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:14:53,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:14:53,279 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:14:53,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:14:53,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887530727] [2023-04-01 04:14:53,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887530727] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:14:53,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:14:53,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:14:53,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54441766] [2023-04-01 04:14:53,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:14:53,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:14:53,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:14:53,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:14:53,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:14:53,281 INFO L87 Difference]: Start difference. First operand 469 states and 824 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:14:55,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:14:55,347 INFO L93 Difference]: Finished difference Result 1421 states and 2520 transitions. [2023-04-01 04:14:55,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:14:55,347 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2023-04-01 04:14:55,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:14:55,356 INFO L225 Difference]: With dead ends: 1421 [2023-04-01 04:14:55,356 INFO L226 Difference]: Without dead ends: 957 [2023-04-01 04:14:55,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:14:55,362 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 746 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1416 mSolverCounterSat, 326 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 326 IncrementalHoareTripleChecker+Valid, 1416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:14:55,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [746 Valid, 48 Invalid, 1742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [326 Valid, 1416 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-04-01 04:14:55,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2023-04-01 04:14:55,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 932. [2023-04-01 04:14:55,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 912 states have (on average 1.4923245614035088) internal successors, (1361), 916 states have internal predecessors, (1361), 8 states have call successors, (8), 8 states have call predecessors, (8), 11 states have return successors, (27), 7 states have call predecessors, (27), 7 states have call successors, (27) [2023-04-01 04:14:55,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1396 transitions. [2023-04-01 04:14:55,411 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1396 transitions. Word has length 23 [2023-04-01 04:14:55,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:14:55,411 INFO L495 AbstractCegarLoop]: Abstraction has 932 states and 1396 transitions. [2023-04-01 04:14:55,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:14:55,412 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1396 transitions. [2023-04-01 04:14:55,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-01 04:14:55,412 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:14:55,413 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:14:55,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:14:55,413 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:14:55,413 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:14:55,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1884883938, now seen corresponding path program 1 times [2023-04-01 04:14:55,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:14:55,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443607289] [2023-04-01 04:14:55,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:14:55,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:14:55,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:14:55,641 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:14:55,641 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:14:55,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443607289] [2023-04-01 04:14:55,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443607289] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:14:55,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:14:55,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:14:55,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238674155] [2023-04-01 04:14:55,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:14:55,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:14:55,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:14:55,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:14:55,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:14:55,647 INFO L87 Difference]: Start difference. First operand 932 states and 1396 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:14:57,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:14:57,537 INFO L93 Difference]: Finished difference Result 2838 states and 4328 transitions. [2023-04-01 04:14:57,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:14:57,538 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 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 35 [2023-04-01 04:14:57,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:14:57,545 INFO L225 Difference]: With dead ends: 2838 [2023-04-01 04:14:57,545 INFO L226 Difference]: Without dead ends: 1911 [2023-04-01 04:14:57,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:14:57,552 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 820 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1205 mSolverCounterSat, 469 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 820 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 469 IncrementalHoareTripleChecker+Valid, 1205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-04-01 04:14:57,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [820 Valid, 47 Invalid, 1674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [469 Valid, 1205 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-04-01 04:14:57,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1911 states. [2023-04-01 04:14:57,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1911 to 1660. [2023-04-01 04:14:57,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1660 states, 1613 states have (on average 1.3415995040297581) internal successors, (2164), 1634 states have internal predecessors, (2164), 13 states have call successors, (13), 13 states have call predecessors, (13), 33 states have return successors, (74), 12 states have call predecessors, (74), 12 states have call successors, (74) [2023-04-01 04:14:57,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1660 states to 1660 states and 2251 transitions. [2023-04-01 04:14:57,614 INFO L78 Accepts]: Start accepts. Automaton has 1660 states and 2251 transitions. Word has length 35 [2023-04-01 04:14:57,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:14:57,614 INFO L495 AbstractCegarLoop]: Abstraction has 1660 states and 2251 transitions. [2023-04-01 04:14:57,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:14:57,614 INFO L276 IsEmpty]: Start isEmpty. Operand 1660 states and 2251 transitions. [2023-04-01 04:14:57,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-04-01 04:14:57,622 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:14:57,622 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:14:57,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:14:57,622 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:14:57,623 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:14:57,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1944026259, now seen corresponding path program 1 times [2023-04-01 04:14:57,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:14:57,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944591037] [2023-04-01 04:14:57,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:14:57,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:14:57,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:14:58,071 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 04:14:58,071 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:14:58,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944591037] [2023-04-01 04:14:58,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944591037] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:14:58,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684332597] [2023-04-01 04:14:58,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:14:58,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:14:58,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:14:58,074 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:14:58,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 04:14:58,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:14:58,181 INFO L262 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:14:58,188 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:14:58,283 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:14:58,284 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 04:14:58,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684332597] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:14:58,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 04:14:58,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-04-01 04:14:58,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130360442] [2023-04-01 04:14:58,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:14:58,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:14:58,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:14:58,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:14:58,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:14:58,286 INFO L87 Difference]: Start difference. First operand 1660 states and 2251 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 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 04:14:59,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:14:59,499 INFO L93 Difference]: Finished difference Result 4248 states and 5985 transitions. [2023-04-01 04:14:59,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:14:59,503 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 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 152 [2023-04-01 04:14:59,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:14:59,515 INFO L225 Difference]: With dead ends: 4248 [2023-04-01 04:14:59,515 INFO L226 Difference]: Without dead ends: 2593 [2023-04-01 04:14:59,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:14:59,523 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 250 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 319 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 319 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:14:59,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 99 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [319 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-01 04:14:59,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2593 states. [2023-04-01 04:14:59,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2593 to 2547. [2023-04-01 04:14:59,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2547 states, 2483 states have (on average 1.3322593636729763) internal successors, (3308), 2509 states have internal predecessors, (3308), 19 states have call successors, (19), 19 states have call predecessors, (19), 44 states have return successors, (163), 18 states have call predecessors, (163), 18 states have call successors, (163) [2023-04-01 04:14:59,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2547 states to 2547 states and 3490 transitions. [2023-04-01 04:14:59,624 INFO L78 Accepts]: Start accepts. Automaton has 2547 states and 3490 transitions. Word has length 152 [2023-04-01 04:14:59,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:14:59,628 INFO L495 AbstractCegarLoop]: Abstraction has 2547 states and 3490 transitions. [2023-04-01 04:14:59,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 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 04:14:59,628 INFO L276 IsEmpty]: Start isEmpty. Operand 2547 states and 3490 transitions. [2023-04-01 04:14:59,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2023-04-01 04:14:59,635 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:14:59,636 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:14:59,651 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 04:14:59,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:14:59,852 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:14:59,852 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:14:59,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1991710381, now seen corresponding path program 1 times [2023-04-01 04:14:59,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:14:59,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154898122] [2023-04-01 04:14:59,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:14:59,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:14:59,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:15:00,178 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 56 proven. 2 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-04-01 04:15:00,178 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:15:00,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154898122] [2023-04-01 04:15:00,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154898122] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:15:00,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267715750] [2023-04-01 04:15:00,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:15:00,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:15:00,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:15:00,184 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:15:00,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 04:15:00,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:15:00,327 INFO L262 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:15:00,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:15:00,404 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 56 proven. 2 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-04-01 04:15:00,404 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:15:00,524 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 56 proven. 2 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-04-01 04:15:00,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267715750] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:15:00,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [152503438] [2023-04-01 04:15:00,552 INFO L159 IcfgInterpreter]: Started Sifa with 148 locations of interest [2023-04-01 04:15:00,552 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:15:00,555 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:15:00,560 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:15:00,561 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:15:00,727 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 51 for LOIs [2023-04-01 04:15:00,988 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 16 [2023-04-01 04:15:01,128 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 14949 conjuctions. This might take some time... [2023-04-01 04:15:02,452 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 577 conjuctions. [2023-04-01 04:15:11,910 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 45