/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/eca-rers2012/Problem15_label35.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 10:17:37,454 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 10:17:37,456 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 10:17:37,486 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 10:17:37,487 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 10:17:37,489 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 10:17:37,493 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 10:17:37,495 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 10:17:37,496 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 10:17:37,499 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 10:17:37,500 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 10:17:37,502 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 10:17:37,502 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 10:17:37,504 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 10:17:37,505 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 10:17:37,506 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 10:17:37,506 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 10:17:37,507 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 10:17:37,508 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 10:17:37,512 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 10:17:37,512 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 10:17:37,513 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 10:17:37,514 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 10:17:37,515 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 10:17:37,521 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 10:17:37,521 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 10:17:37,521 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 10:17:37,523 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 10:17:37,523 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 10:17:37,524 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 10:17:37,524 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 10:17:37,524 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 10:17:37,526 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 10:17:37,526 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 10:17:37,527 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 10:17:37,527 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 10:17:37,527 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 10:17:37,528 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 10:17:37,528 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 10:17:37,529 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 10:17:37,529 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 10:17:37,530 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 10:17:37,553 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 10:17:37,553 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 10:17:37,553 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 10:17:37,553 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 10:17:37,554 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 10:17:37,554 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 10:17:37,554 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 10:17:37,554 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 10:17:37,555 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 10:17:37,555 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 10:17:37,555 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 10:17:37,555 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 10:17:37,555 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 10:17:37,556 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 10:17:37,556 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 10:17:37,556 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 10:17:37,556 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 10:17:37,556 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 10:17:37,556 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 10:17:37,556 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 10:17:37,557 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 10:17:37,557 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 10:17:37,557 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 10:17:37,557 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 10:17:37,557 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 10:17:37,557 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 10:17:37,557 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 10:17:37,557 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 10:17:37,557 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 10:17:37,557 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 10:17:37,558 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 10:17:37,558 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 10:17:37,558 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:17:37,558 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 10:17:37,558 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 10:17:37,558 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 10:17:37,558 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 10:17:37,558 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 10:17:37,559 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 10:17:37,559 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 10:17:37,559 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 10:17:37,559 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 10:17:37,754 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 10:17:37,766 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 10:17:37,768 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 10:17:37,768 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 10:17:37,769 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 10:17:37,770 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label35.c [2023-04-01 10:17:38,765 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 10:17:39,056 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 10:17:39,056 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label35.c [2023-04-01 10:17:39,066 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e72706e4/2732221fdbba454683cb94d8c56ba7db/FLAG3981d1b2b [2023-04-01 10:17:39,075 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e72706e4/2732221fdbba454683cb94d8c56ba7db [2023-04-01 10:17:39,077 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 10:17:39,078 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 10:17:39,078 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 10:17:39,079 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 10:17:39,081 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 10:17:39,081 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:17:39" (1/1) ... [2023-04-01 10:17:39,082 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b96f486 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:17:39, skipping insertion in model container [2023-04-01 10:17:39,082 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:17:39" (1/1) ... [2023-04-01 10:17:39,086 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 10:17:39,134 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 10:17:39,261 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_label35.c[4490,4503] [2023-04-01 10:17:39,616 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:17:39,626 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 10:17:39,651 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_label35.c[4490,4503] [2023-04-01 10:17:39,777 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:17:39,791 INFO L208 MainTranslator]: Completed translation [2023-04-01 10:17:39,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:17:39 WrapperNode [2023-04-01 10:17:39,792 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 10:17:39,792 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 10:17:39,793 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 10:17:39,793 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 10:17:39,801 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:17:39" (1/1) ... [2023-04-01 10:17:39,801 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:17:39" (1/1) ... [2023-04-01 10:17:39,830 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:17:39" (1/1) ... [2023-04-01 10:17:39,831 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:17:39" (1/1) ... [2023-04-01 10:17:39,887 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:17:39" (1/1) ... [2023-04-01 10:17:39,904 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:17:39" (1/1) ... [2023-04-01 10:17:39,912 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:17:39" (1/1) ... [2023-04-01 10:17:39,920 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:17:39" (1/1) ... [2023-04-01 10:17:39,930 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 10:17:39,931 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 10:17:39,931 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 10:17:39,931 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 10:17:39,932 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:17:39" (1/1) ... [2023-04-01 10:17:39,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:17:39,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:17:39,986 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 10:17:40,001 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 10:17:40,036 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 10:17:40,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 10:17:40,037 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 10:17:40,037 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 10:17:40,037 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 10:17:40,037 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 10:17:40,037 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 10:17:40,037 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 10:17:40,037 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 10:17:40,038 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 10:17:40,038 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 10:17:40,038 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 10:17:40,038 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 10:17:40,038 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 10:17:40,038 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 10:17:40,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 10:17:40,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 10:17:40,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 10:17:40,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 10:17:40,039 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 10:17:40,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 10:17:40,135 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 10:17:40,149 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 10:17:41,919 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 10:17:42,434 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 10:17:42,434 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 10:17:42,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:17:42 BoogieIcfgContainer [2023-04-01 10:17:42,437 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 10:17:42,439 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 10:17:42,439 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 10:17:42,441 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 10:17:42,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:17:39" (1/3) ... [2023-04-01 10:17:42,442 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21c6a135 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:17:42, skipping insertion in model container [2023-04-01 10:17:42,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:17:39" (2/3) ... [2023-04-01 10:17:42,442 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21c6a135 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:17:42, skipping insertion in model container [2023-04-01 10:17:42,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:17:42" (3/3) ... [2023-04-01 10:17:42,443 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label35.c [2023-04-01 10:17:42,456 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 10:17:42,456 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 10:17:42,502 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 10:17:42,507 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;@156fd2be, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 10:17:42,507 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 10:17:42,512 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 10:17:42,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 10:17:42,517 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:17:42,518 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:17:42,519 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:17:42,522 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:17:42,523 INFO L85 PathProgramCache]: Analyzing trace with hash 271517379, now seen corresponding path program 1 times [2023-04-01 10:17:42,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:17:42,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724242630] [2023-04-01 10:17:42,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:17:42,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:17:42,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:17:42,848 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 10:17:42,848 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:17:42,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724242630] [2023-04-01 10:17:42,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724242630] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:17:42,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:17:42,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:17:42,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596653252] [2023-04-01 10:17:42,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:17:42,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:17:42,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:17:42,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:17:42,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:17:42,890 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 10:17:44,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:17:44,389 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2023-04-01 10:17:44,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:17:44,390 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 10:17:44,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:17:44,401 INFO L225 Difference]: With dead ends: 718 [2023-04-01 10:17:44,401 INFO L226 Difference]: Without dead ends: 471 [2023-04-01 10:17:44,430 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 10:17:44,432 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 240 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-01 10:17:44,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 48 Invalid, 995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-01 10:17:44,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-04-01 10:17:44,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 442. [2023-04-01 10:17:44,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 432 states have (on average 1.9305555555555556) internal successors, (834), 432 states have internal predecessors, (834), 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 10:17:44,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 845 transitions. [2023-04-01 10:17:44,498 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 845 transitions. Word has length 11 [2023-04-01 10:17:44,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:17:44,498 INFO L495 AbstractCegarLoop]: Abstraction has 442 states and 845 transitions. [2023-04-01 10:17:44,498 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 10:17:44,499 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 845 transitions. [2023-04-01 10:17:44,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 10:17:44,499 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:17:44,500 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:17:44,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 10:17:44,500 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:17:44,500 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:17:44,500 INFO L85 PathProgramCache]: Analyzing trace with hash 55940117, now seen corresponding path program 1 times [2023-04-01 10:17:44,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:17:44,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289084085] [2023-04-01 10:17:44,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:17:44,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:17:44,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:17:44,571 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 10:17:44,572 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:17:44,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289084085] [2023-04-01 10:17:44,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289084085] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:17:44,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:17:44,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:17:44,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820239441] [2023-04-01 10:17:44,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:17:44,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:17:44,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:17:44,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:17:44,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:17:44,574 INFO L87 Difference]: Start difference. First operand 442 states and 845 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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 10:17:45,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:17:45,907 INFO L93 Difference]: Finished difference Result 1314 states and 2536 transitions. [2023-04-01 10:17:45,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:17:45,908 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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 21 [2023-04-01 10:17:45,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:17:45,912 INFO L225 Difference]: With dead ends: 1314 [2023-04-01 10:17:45,912 INFO L226 Difference]: Without dead ends: 877 [2023-04-01 10:17:45,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 10:17:45,914 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 243 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-01 10:17:45,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 169 Invalid, 927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-01 10:17:45,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2023-04-01 10:17:45,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 842. [2023-04-01 10:17:45,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 826 states have (on average 1.6004842615012107) internal successors, (1322), 826 states have internal predecessors, (1322), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2023-04-01 10:17:45,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1349 transitions. [2023-04-01 10:17:45,960 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1349 transitions. Word has length 21 [2023-04-01 10:17:45,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:17:45,960 INFO L495 AbstractCegarLoop]: Abstraction has 842 states and 1349 transitions. [2023-04-01 10:17:45,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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 10:17:45,960 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1349 transitions. [2023-04-01 10:17:45,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-01 10:17:45,966 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:17:45,966 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] [2023-04-01 10:17:45,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 10:17:45,967 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:17:45,967 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:17:45,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1545894529, now seen corresponding path program 1 times [2023-04-01 10:17:45,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:17:45,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673416160] [2023-04-01 10:17:45,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:17:45,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:17:46,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:17:46,172 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 10:17:46,172 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:17:46,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673416160] [2023-04-01 10:17:46,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673416160] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:17:46,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:17:46,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:17:46,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707526619] [2023-04-01 10:17:46,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:17:46,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:17:46,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:17:46,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:17:46,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:17:46,177 INFO L87 Difference]: Start difference. First operand 842 states and 1349 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 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 10:17:47,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:17:47,929 INFO L93 Difference]: Finished difference Result 2560 states and 4171 transitions. [2023-04-01 10:17:47,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 10:17:47,929 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 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 38 [2023-04-01 10:17:47,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:17:47,936 INFO L225 Difference]: With dead ends: 2560 [2023-04-01 10:17:47,936 INFO L226 Difference]: Without dead ends: 1723 [2023-04-01 10:17:47,937 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 10:17:47,938 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 814 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1205 mSolverCounterSat, 469 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 814 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, 1.7s IncrementalHoareTripleChecker+Time [2023-04-01 10:17:47,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [814 Valid, 47 Invalid, 1674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [469 Valid, 1205 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-04-01 10:17:47,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1723 states. [2023-04-01 10:17:47,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1723 to 1380. [2023-04-01 10:17:47,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1344 states have (on average 1.4308035714285714) internal successors, (1923), 1354 states have internal predecessors, (1923), 13 states have call successors, (13), 13 states have call predecessors, (13), 22 states have return successors, (65), 12 states have call predecessors, (65), 12 states have call successors, (65) [2023-04-01 10:17:47,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 2001 transitions. [2023-04-01 10:17:47,982 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 2001 transitions. Word has length 38 [2023-04-01 10:17:47,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:17:47,982 INFO L495 AbstractCegarLoop]: Abstraction has 1380 states and 2001 transitions. [2023-04-01 10:17:47,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 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 10:17:47,982 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 2001 transitions. [2023-04-01 10:17:47,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2023-04-01 10:17:47,992 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:17:47,993 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:17:47,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 10:17:47,993 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:17:47,994 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:17:47,994 INFO L85 PathProgramCache]: Analyzing trace with hash -2071206889, now seen corresponding path program 1 times [2023-04-01 10:17:47,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:17:47,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867643015] [2023-04-01 10:17:47,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:17:47,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:17:48,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:17:48,323 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:17:48,324 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:17:48,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867643015] [2023-04-01 10:17:48,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867643015] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:17:48,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106166533] [2023-04-01 10:17:48,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:17:48,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:17:48,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:17:48,331 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 10:17:48,332 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 10:17:48,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:17:48,451 INFO L262 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 10:17:48,458 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:17:48,572 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:17:48,572 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:17:48,690 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:17:48,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106166533] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:17:48,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [133368848] [2023-04-01 10:17:48,748 INFO L159 IcfgInterpreter]: Started Sifa with 148 locations of interest [2023-04-01 10:17:48,748 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:17:48,753 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:17:48,756 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:17:48,757 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:17:49,024 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 83 for LOIs [2023-04-01 10:17:49,345 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2023-04-01 10:17:59,491 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 31