/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 IntervalDomain -i ../sv-benchmarks/c/eca-rers2012/Problem17_label23.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:21:28,326 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:21:28,327 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:21:28,363 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:21:28,364 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:21:28,366 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:21:28,369 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:21:28,371 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:21:28,372 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:21:28,377 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:21:28,378 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:21:28,379 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:21:28,380 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:21:28,382 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:21:28,386 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:21:28,388 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:21:28,388 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:21:28,389 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:21:28,391 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:21:28,396 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:21:28,397 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:21:28,399 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:21:28,400 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:21:28,401 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:21:28,407 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 22:21:28,408 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 22:21:28,408 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 22:21:28,409 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 22:21:28,409 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 22:21:28,410 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 22:21:28,410 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:21:28,410 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:21:28,411 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:21:28,411 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:21:28,412 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:21:28,412 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:21:28,416 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:21:28,416 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:21:28,417 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:21:28,418 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:21:28,418 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:21:28,420 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 [2023-03-31 22:21:28,450 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:21:28,450 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:21:28,451 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:21:28,451 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:21:28,452 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:21:28,452 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:21:28,452 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:21:28,452 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:21:28,452 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:21:28,453 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:21:28,453 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:21:28,453 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:21:28,453 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:21:28,454 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:21:28,454 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:21:28,454 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:21:28,454 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:21:28,454 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:21:28,455 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:21:28,455 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:21:28,455 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:21:28,455 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:21:28,455 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:21:28,455 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:21:28,456 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:21:28,456 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:21:28,456 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:21:28,456 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:21:28,456 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:21:28,456 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:21:28,456 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:21:28,457 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:21:28,457 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:21:28,457 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:21:28,457 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:21:28,457 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:21:28,457 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:21:28,457 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:21:28,458 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:21:28,458 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:21:28,458 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:21:28,458 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:21:28,661 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:21:28,679 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:21:28,681 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:21:28,682 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:21:28,682 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:21:28,684 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label23.c [2023-03-31 22:21:29,850 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:21:30,228 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:21:30,229 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label23.c [2023-03-31 22:21:30,251 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba7d4fb83/9026c87e3bc14c7d9c09c08c19aae982/FLAG35fa6e36e [2023-03-31 22:21:30,267 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba7d4fb83/9026c87e3bc14c7d9c09c08c19aae982 [2023-03-31 22:21:30,270 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:21:30,272 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:21:30,275 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:21:30,275 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:21:30,278 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:21:30,278 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:21:30" (1/1) ... [2023-03-31 22:21:30,280 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46d4cd88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:21:30, skipping insertion in model container [2023-03-31 22:21:30,280 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:21:30" (1/1) ... [2023-03-31 22:21:30,286 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:21:30,376 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:21:30,581 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/Problem17_label23.c[3293,3306] [2023-03-31 22:21:31,096 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:21:31,107 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:21:31,133 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/Problem17_label23.c[3293,3306] [2023-03-31 22:21:31,340 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:21:31,357 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:21:31,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:21:31 WrapperNode [2023-03-31 22:21:31,357 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:21:31,359 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:21:31,359 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:21:31,359 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:21:31,369 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:21:31" (1/1) ... [2023-03-31 22:21:31,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:21:31" (1/1) ... [2023-03-31 22:21:31,422 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:21:31" (1/1) ... [2023-03-31 22:21:31,423 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:21:31" (1/1) ... [2023-03-31 22:21:31,486 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:21:31" (1/1) ... [2023-03-31 22:21:31,508 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:21:31" (1/1) ... [2023-03-31 22:21:31,523 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:21:31" (1/1) ... [2023-03-31 22:21:31,535 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:21:31" (1/1) ... [2023-03-31 22:21:31,554 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:21:31,555 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:21:31,556 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:21:31,556 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:21:31,557 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:21:31" (1/1) ... [2023-03-31 22:21:31,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:21:31,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:21:31,591 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) [2023-03-31 22:21:31,616 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 [2023-03-31 22:21:31,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:21:31,687 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:21:31,687 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:21:31,687 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 22:21:31,687 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 22:21:31,687 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:21:31,687 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 22:21:31,687 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 22:21:31,687 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:21:31,687 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:21:31,687 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:21:31,687 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:21:31,687 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:21:31,688 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:21:31,688 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:21:31,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:21:31,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:21:31,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:21:31,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:21:31,688 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:21:31,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:21:31,772 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:21:31,775 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:21:34,920 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:21:43,615 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:21:43,615 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 22:21:43,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:21:43 BoogieIcfgContainer [2023-03-31 22:21:43,618 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:21:43,620 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:21:43,620 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:21:43,623 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:21:43,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:21:30" (1/3) ... [2023-03-31 22:21:43,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28d21f33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:21:43, skipping insertion in model container [2023-03-31 22:21:43,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:21:31" (2/3) ... [2023-03-31 22:21:43,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28d21f33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:21:43, skipping insertion in model container [2023-03-31 22:21:43,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:21:43" (3/3) ... [2023-03-31 22:21:43,625 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label23.c [2023-03-31 22:21:43,640 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:21:43,641 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:21:43,682 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:21:43,688 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;@2e0e59a1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:21:43,688 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:21:43,693 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) [2023-03-31 22:21:43,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 22:21:43,698 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:21:43,699 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:21:43,699 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:21:43,703 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:21:43,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1887801398, now seen corresponding path program 1 times [2023-03-31 22:21:43,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:21:43,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872599809] [2023-03-31 22:21:43,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:21:43,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:21:43,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:21:44,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:21:44,029 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:21:44,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872599809] [2023-03-31 22:21:44,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872599809] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:21:44,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:21:44,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:21:44,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809262016] [2023-03-31 22:21:44,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:21:44,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:21:44,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:21:44,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:21:44,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:21:44,067 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) [2023-03-31 22:21:45,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:21:45,556 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2023-03-31 22:21:45,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:21:45,558 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 [2023-03-31 22:21:45,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:21:45,570 INFO L225 Difference]: With dead ends: 718 [2023-03-31 22:21:45,570 INFO L226 Difference]: Without dead ends: 471 [2023-03-31 22:21:45,576 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 [2023-03-31 22:21:45,578 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 241 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-03-31 22:21:45,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 60 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-03-31 22:21:45,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-03-31 22:21:45,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 464. [2023-03-31 22:21:45,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 454 states have (on average 1.8986784140969164) internal successors, (862), 454 states have internal predecessors, (862), 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) [2023-03-31 22:21:45,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 873 transitions. [2023-03-31 22:21:45,634 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 873 transitions. Word has length 11 [2023-03-31 22:21:45,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:21:45,634 INFO L495 AbstractCegarLoop]: Abstraction has 464 states and 873 transitions. [2023-03-31 22:21:45,634 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) [2023-03-31 22:21:45,635 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 873 transitions. [2023-03-31 22:21:45,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-03-31 22:21:45,636 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:21:45,636 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:21:45,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:21:45,637 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:21:45,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:21:45,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1229990306, now seen corresponding path program 1 times [2023-03-31 22:21:45,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:21:45,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382364535] [2023-03-31 22:21:45,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:21:45,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:21:45,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:21:45,813 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:21:45,813 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:21:45,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382364535] [2023-03-31 22:21:45,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382364535] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:21:45,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:21:45,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:21:45,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819322950] [2023-03-31 22:21:45,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:21:45,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:21:45,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:21:45,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:21:45,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:21:45,817 INFO L87 Difference]: Start difference. First operand 464 states and 873 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2023-03-31 22:21:47,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:21:47,826 INFO L93 Difference]: Finished difference Result 1398 states and 2661 transitions. [2023-03-31 22:21:47,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 22:21:47,827 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 21 [2023-03-31 22:21:47,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:21:47,832 INFO L225 Difference]: With dead ends: 1398 [2023-03-31 22:21:47,832 INFO L226 Difference]: Without dead ends: 939 [2023-03-31 22:21:47,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-03-31 22:21:47,835 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 710 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1501 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 710 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 1501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-03-31 22:21:47,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [710 Valid, 54 Invalid, 1718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 1501 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-03-31 22:21:47,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2023-03-31 22:21:47,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 869. [2023-03-31 22:21:47,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 851 states have (on average 1.6122209165687427) internal successors, (1372), 855 states have internal predecessors, (1372), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) [2023-03-31 22:21:47,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 1405 transitions. [2023-03-31 22:21:47,877 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 1405 transitions. Word has length 21 [2023-03-31 22:21:47,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:21:47,877 INFO L495 AbstractCegarLoop]: Abstraction has 869 states and 1405 transitions. [2023-03-31 22:21:47,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2023-03-31 22:21:47,878 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 1405 transitions. [2023-03-31 22:21:47,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-03-31 22:21:47,878 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:21:47,878 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:21:47,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 22:21:47,879 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:21:47,879 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:21:47,879 INFO L85 PathProgramCache]: Analyzing trace with hash 308738718, now seen corresponding path program 1 times [2023-03-31 22:21:47,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:21:47,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670340845] [2023-03-31 22:21:47,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:21:47,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:21:47,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:21:48,013 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:21:48,014 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:21:48,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670340845] [2023-03-31 22:21:48,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670340845] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:21:48,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:21:48,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:21:48,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946414128] [2023-03-31 22:21:48,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:21:48,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:21:48,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:21:48,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:21:48,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:21:48,016 INFO L87 Difference]: Start difference. First operand 869 states and 1405 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) [2023-03-31 22:21:49,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:21:49,757 INFO L93 Difference]: Finished difference Result 2642 states and 4335 transitions. [2023-03-31 22:21:49,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:21:49,757 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 [2023-03-31 22:21:49,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:21:49,766 INFO L225 Difference]: With dead ends: 2642 [2023-03-31 22:21:49,766 INFO L226 Difference]: Without dead ends: 1778 [2023-03-31 22:21:49,768 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 [2023-03-31 22:21:49,769 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 736 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1280 mSolverCounterSat, 465 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 736 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 465 IncrementalHoareTripleChecker+Valid, 1280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-03-31 22:21:49,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [736 Valid, 46 Invalid, 1745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [465 Valid, 1280 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-03-31 22:21:49,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1778 states. [2023-03-31 22:21:49,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1778 to 1112. [2023-03-31 22:21:49,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1084 states have (on average 1.4833948339483394) internal successors, (1608), 1094 states have internal predecessors, (1608), 9 states have call successors, (9), 9 states have call predecessors, (9), 18 states have return successors, (54), 8 states have call predecessors, (54), 8 states have call successors, (54) [2023-03-31 22:21:49,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 1671 transitions. [2023-03-31 22:21:49,814 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 1671 transitions. Word has length 23 [2023-03-31 22:21:49,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:21:49,814 INFO L495 AbstractCegarLoop]: Abstraction has 1112 states and 1671 transitions. [2023-03-31 22:21:49,814 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) [2023-03-31 22:21:49,814 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 1671 transitions. [2023-03-31 22:21:49,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-03-31 22:21:49,815 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:21:49,815 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] [2023-03-31 22:21:49,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 22:21:49,816 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:21:49,816 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:21:49,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1572433666, now seen corresponding path program 1 times [2023-03-31 22:21:49,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:21:49,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363119069] [2023-03-31 22:21:49,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:21:49,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:21:49,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:21:49,960 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:21:49,961 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:21:49,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363119069] [2023-03-31 22:21:49,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363119069] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:21:49,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:21:49,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:21:49,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536391420] [2023-03-31 22:21:49,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:21:49,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:21:49,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:21:49,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:21:49,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:21:49,963 INFO L87 Difference]: Start difference. First operand 1112 states and 1671 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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) [2023-03-31 22:21:53,136 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-03-31 22:21:53,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:21:53,443 INFO L93 Difference]: Finished difference Result 2921 states and 4535 transitions. [2023-03-31 22:21:53,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:21:53,444 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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 26 [2023-03-31 22:21:53,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:21:53,452 INFO L225 Difference]: With dead ends: 2921 [2023-03-31 22:21:53,452 INFO L226 Difference]: Without dead ends: 1814 [2023-03-31 22:21:53,455 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 [2023-03-31 22:21:53,462 INFO L413 NwaCegarLoop]: 373 mSDtfsCounter, 248 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 266 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-03-31 22:21:53,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 388 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 656 Invalid, 1 Unknown, 0 Unchecked, 3.4s Time] [2023-03-31 22:21:53,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1814 states. [2023-03-31 22:21:53,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1814 to 1597. [2023-03-31 22:21:53,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1597 states, 1558 states have (on average 1.4152759948652118) internal successors, (2205), 1573 states have internal predecessors, (2205), 12 states have call successors, (12), 12 states have call predecessors, (12), 26 states have return successors, (113), 11 states have call predecessors, (113), 11 states have call successors, (113) [2023-03-31 22:21:53,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1597 states to 1597 states and 2330 transitions. [2023-03-31 22:21:53,507 INFO L78 Accepts]: Start accepts. Automaton has 1597 states and 2330 transitions. Word has length 26 [2023-03-31 22:21:53,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:21:53,508 INFO L495 AbstractCegarLoop]: Abstraction has 1597 states and 2330 transitions. [2023-03-31 22:21:53,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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) [2023-03-31 22:21:53,508 INFO L276 IsEmpty]: Start isEmpty. Operand 1597 states and 2330 transitions. [2023-03-31 22:21:53,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-03-31 22:21:53,513 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:21:53,514 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2023-03-31 22:21:53,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 22:21:53,514 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:21:53,515 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:21:53,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1207926834, now seen corresponding path program 1 times [2023-03-31 22:21:53,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:21:53,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728374147] [2023-03-31 22:21:53,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:21:53,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:21:53,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:21:53,688 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:21:53,688 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:21:53,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728374147] [2023-03-31 22:21:53,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728374147] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:21:53,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97848115] [2023-03-31 22:21:53,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:21:53,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:21:53,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:21:53,697 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) [2023-03-31 22:21:53,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 22:21:53,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:21:53,801 INFO L262 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 22:21:53,806 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:21:53,884 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:21:53,885 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:21:53,973 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:21:53,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97848115] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:21:53,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [527770485] [2023-03-31 22:21:53,991 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2023-03-31 22:21:53,991 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:21:53,994 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:21:53,998 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:21:53,999 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:21:54,235 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 50 for LOIs [2023-03-31 22:21:54,377 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 15 [2023-03-31 22:21:54,621 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 46 [2023-03-31 22:21:55,725 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 27382 conjuctions. This might take some time... [2023-03-31 22:21:56,178 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 174 conjuctions. [2023-03-31 22:21:56,775 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 46 for LOIs [2023-03-31 22:21:56,848 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 15 [2023-03-31 22:22:09,792 WARN L223 SmtUtils]: Spent 6.26s on a formula simplification that was a NOOP. DAG size: 450 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)