/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/eca-rers2012/Problem19_label28.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 20:38:44,274 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 20:38:44,276 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 20:38:44,306 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 20:38:44,307 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 20:38:44,307 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 20:38:44,310 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 20:38:44,315 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 20:38:44,317 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 20:38:44,323 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 20:38:44,325 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 20:38:44,326 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 20:38:44,326 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 20:38:44,332 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 20:38:44,334 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 20:38:44,336 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 20:38:44,337 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 20:38:44,337 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 20:38:44,340 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 20:38:44,344 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 20:38:44,345 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 20:38:44,346 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 20:38:44,347 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 20:38:44,348 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 20:38:44,350 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 20:38:44,350 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 20:38:44,351 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 20:38:44,351 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 20:38:44,351 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 20:38:44,352 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 20:38:44,352 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 20:38:44,353 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 20:38:44,353 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 20:38:44,354 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 20:38:44,354 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 20:38:44,355 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 20:38:44,355 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 20:38:44,355 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 20:38:44,355 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 20:38:44,356 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 20:38:44,357 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 20:38:44,361 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 [2023-04-02 20:38:44,389 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 20:38:44,390 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 20:38:44,390 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 20:38:44,390 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 20:38:44,391 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 20:38:44,391 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 20:38:44,391 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 20:38:44,391 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 20:38:44,392 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 20:38:44,392 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 20:38:44,393 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 20:38:44,393 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 20:38:44,393 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 20:38:44,393 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 20:38:44,393 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 20:38:44,393 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 20:38:44,393 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 20:38:44,393 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 20:38:44,395 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 20:38:44,395 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 20:38:44,395 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 20:38:44,395 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 20:38:44,395 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 20:38:44,396 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 20:38:44,396 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 20:38:44,396 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 20:38:44,396 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 20:38:44,396 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 20:38:44,396 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 20:38:44,396 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 20:38:44,396 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 20:38:44,397 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 20:38:44,397 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 20:38:44,397 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 20:38:44,397 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 20:38:44,397 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 20:38:44,397 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 20:38:44,397 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 20:38:44,398 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 20:38:44,398 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 20:38:44,398 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 20:38:44,398 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 20:38:44,644 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 20:38:44,678 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 20:38:44,683 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 20:38:44,684 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 20:38:44,685 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 20:38:44,686 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label28.c [2023-04-02 20:38:45,871 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 20:38:46,404 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 20:38:46,404 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label28.c [2023-04-02 20:38:46,459 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d05d249f/d9aae8d92cf64780b2ce6e4153a0f252/FLAG85141f965 [2023-04-02 20:38:46,476 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d05d249f/d9aae8d92cf64780b2ce6e4153a0f252 [2023-04-02 20:38:46,480 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 20:38:46,482 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 20:38:46,485 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 20:38:46,485 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 20:38:46,488 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 20:38:46,489 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 08:38:46" (1/1) ... [2023-04-02 20:38:46,490 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fc26441 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:38:46, skipping insertion in model container [2023-04-02 20:38:46,491 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 08:38:46" (1/1) ... [2023-04-02 20:38:46,498 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 20:38:46,655 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 20:38:46,952 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/Problem19_label28.c[3379,3392] [2023-04-02 20:38:48,120 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 20:38:48,130 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 20:38:48,144 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/Problem19_label28.c[3379,3392] [2023-04-02 20:38:48,828 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 20:38:48,861 INFO L208 MainTranslator]: Completed translation [2023-04-02 20:38:48,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:38:48 WrapperNode [2023-04-02 20:38:48,862 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 20:38:48,863 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 20:38:48,863 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 20:38:48,863 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 20:38:48,873 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:38:48" (1/1) ... [2023-04-02 20:38:48,873 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:38:48" (1/1) ... [2023-04-02 20:38:48,963 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:38:48" (1/1) ... [2023-04-02 20:38:48,963 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:38:48" (1/1) ... [2023-04-02 20:38:49,126 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:38:48" (1/1) ... [2023-04-02 20:38:49,263 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:38:48" (1/1) ... [2023-04-02 20:38:49,297 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:38:48" (1/1) ... [2023-04-02 20:38:49,320 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:38:48" (1/1) ... [2023-04-02 20:38:49,387 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 20:38:49,389 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 20:38:49,389 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 20:38:49,389 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 20:38:49,390 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:38:48" (1/1) ... [2023-04-02 20:38:49,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 20:38:49,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 20:38:49,419 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) [2023-04-02 20:38:49,496 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 [2023-04-02 20:38:49,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 20:38:49,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 20:38:49,509 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 20:38:49,510 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-02 20:38:49,510 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-02 20:38:49,510 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-02 20:38:49,510 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-02 20:38:49,510 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-04-02 20:38:49,510 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-04-02 20:38:49,510 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 20:38:49,510 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-02 20:38:49,510 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-02 20:38:49,510 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-02 20:38:49,510 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-02 20:38:49,510 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-04-02 20:38:49,510 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-04-02 20:38:49,511 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 20:38:49,511 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 20:38:49,511 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 20:38:49,511 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 20:38:49,511 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 20:38:49,511 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 20:38:49,511 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 20:38:49,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 20:38:49,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 20:38:49,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 20:38:49,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 20:38:49,511 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 20:38:49,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 20:38:49,616 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 20:38:49,618 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 20:38:56,872 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 20:39:11,040 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 20:39:11,040 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 20:39:11,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 08:39:11 BoogieIcfgContainer [2023-04-02 20:39:11,044 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 20:39:11,046 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 20:39:11,046 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 20:39:11,048 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 20:39:11,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 08:38:46" (1/3) ... [2023-04-02 20:39:11,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5850335c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 08:39:11, skipping insertion in model container [2023-04-02 20:39:11,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:38:48" (2/3) ... [2023-04-02 20:39:11,050 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5850335c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 08:39:11, skipping insertion in model container [2023-04-02 20:39:11,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 08:39:11" (3/3) ... [2023-04-02 20:39:11,051 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label28.c [2023-04-02 20:39:11,068 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 20:39:11,068 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 20:39:11,158 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 20:39:11,165 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;@1891523d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 20:39:11,165 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 20:39:11,175 INFO L276 IsEmpty]: Start isEmpty. Operand has 1144 states, 1126 states have (on average 1.980461811722913) internal successors, (2230), 1127 states have internal predecessors, (2230), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-02 20:39:11,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-02 20:39:11,181 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:39:11,182 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 20:39:11,183 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:39:11,187 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:39:11,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1432409796, now seen corresponding path program 1 times [2023-04-02 20:39:11,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:39:11,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552289191] [2023-04-02 20:39:11,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:39:11,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:39:11,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:39:11,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 20:39:11,522 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:39:11,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552289191] [2023-04-02 20:39:11,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552289191] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 20:39:11,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 20:39:11,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 20:39:11,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357441709] [2023-04-02 20:39:11,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 20:39:11,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 20:39:11,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 20:39:11,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 20:39:11,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 20:39:11,577 INFO L87 Difference]: Start difference. First operand has 1144 states, 1126 states have (on average 1.980461811722913) internal successors, (2230), 1127 states have internal predecessors, (2230), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) 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) [2023-04-02 20:39:17,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 20:39:17,629 INFO L93 Difference]: Finished difference Result 3418 states and 6741 transitions. [2023-04-02 20:39:17,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 20:39:17,631 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 [2023-04-02 20:39:17,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 20:39:17,672 INFO L225 Difference]: With dead ends: 3418 [2023-04-02 20:39:17,673 INFO L226 Difference]: Without dead ends: 2271 [2023-04-02 20:39:17,684 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 [2023-04-02 20:39:17,688 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 1291 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 3272 mSolverCounterSat, 1797 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1291 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 5069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1797 IncrementalHoareTripleChecker+Valid, 3272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2023-04-02 20:39:17,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1291 Valid, 251 Invalid, 5069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1797 Valid, 3272 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2023-04-02 20:39:17,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2023-04-02 20:39:17,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 2267. [2023-04-02 20:39:17,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2267 states, 2241 states have (on average 1.892904953145917) internal successors, (4242), 2241 states have internal predecessors, (4242), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (22), 12 states have call predecessors, (22), 12 states have call successors, (22) [2023-04-02 20:39:17,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2267 states to 2267 states and 4277 transitions. [2023-04-02 20:39:17,837 INFO L78 Accepts]: Start accepts. Automaton has 2267 states and 4277 transitions. Word has length 11 [2023-04-02 20:39:17,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 20:39:17,838 INFO L495 AbstractCegarLoop]: Abstraction has 2267 states and 4277 transitions. [2023-04-02 20:39:17,838 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) [2023-04-02 20:39:17,838 INFO L276 IsEmpty]: Start isEmpty. Operand 2267 states and 4277 transitions. [2023-04-02 20:39:17,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-02 20:39:17,840 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:39:17,840 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 20:39:17,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 20:39:17,841 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:39:17,841 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:39:17,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1861993453, now seen corresponding path program 1 times [2023-04-02 20:39:17,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:39:17,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130338980] [2023-04-02 20:39:17,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:39:17,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:39:17,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:39:18,158 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 20:39:18,159 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:39:18,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130338980] [2023-04-02 20:39:18,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130338980] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 20:39:18,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 20:39:18,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 20:39:18,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128937742] [2023-04-02 20:39:18,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 20:39:18,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 20:39:18,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 20:39:18,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 20:39:18,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 20:39:18,164 INFO L87 Difference]: Start difference. First operand 2267 states and 4277 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) [2023-04-02 20:39:26,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 20:39:26,632 INFO L93 Difference]: Finished difference Result 6937 states and 13090 transitions. [2023-04-02 20:39:26,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 20:39:26,633 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 [2023-04-02 20:39:26,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 20:39:26,652 INFO L225 Difference]: With dead ends: 6937 [2023-04-02 20:39:26,653 INFO L226 Difference]: Without dead ends: 4675 [2023-04-02 20:39:26,657 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 [2023-04-02 20:39:26,658 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 4003 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 6742 mSolverCounterSat, 1791 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4003 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 8533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1791 IncrementalHoareTripleChecker+Valid, 6742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2023-04-02 20:39:26,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4003 Valid, 178 Invalid, 8533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1791 Valid, 6742 Invalid, 0 Unknown, 0 Unchecked, 8.2s Time] [2023-04-02 20:39:26,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4675 states. [2023-04-02 20:39:26,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4675 to 4604. [2023-04-02 20:39:26,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4604 states, 4526 states have (on average 1.5733539549270878) internal successors, (7121), 4533 states have internal predecessors, (7121), 23 states have call successors, (23), 23 states have call predecessors, (23), 54 states have return successors, (142), 47 states have call predecessors, (142), 22 states have call successors, (142) [2023-04-02 20:39:26,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4604 states to 4604 states and 7286 transitions. [2023-04-02 20:39:26,800 INFO L78 Accepts]: Start accepts. Automaton has 4604 states and 7286 transitions. Word has length 21 [2023-04-02 20:39:26,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 20:39:26,800 INFO L495 AbstractCegarLoop]: Abstraction has 4604 states and 7286 transitions. [2023-04-02 20:39:26,800 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) [2023-04-02 20:39:26,801 INFO L276 IsEmpty]: Start isEmpty. Operand 4604 states and 7286 transitions. [2023-04-02 20:39:26,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-02 20:39:26,801 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:39:26,801 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] [2023-04-02 20:39:26,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 20:39:26,802 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:39:26,802 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:39:26,802 INFO L85 PathProgramCache]: Analyzing trace with hash -840474947, now seen corresponding path program 1 times [2023-04-02 20:39:26,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:39:26,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684381577] [2023-04-02 20:39:26,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:39:26,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:39:26,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:39:26,968 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 20:39:26,968 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:39:26,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684381577] [2023-04-02 20:39:26,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684381577] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 20:39:26,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 20:39:26,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 20:39:26,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770941612] [2023-04-02 20:39:26,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 20:39:26,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 20:39:26,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 20:39:26,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 20:39:26,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 20:39:26,973 INFO L87 Difference]: Start difference. First operand 4604 states and 7286 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2023-04-02 20:39:33,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 20:39:33,395 INFO L93 Difference]: Finished difference Result 12915 states and 21078 transitions. [2023-04-02 20:39:33,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 20:39:33,395 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 24 [2023-04-02 20:39:33,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 20:39:33,431 INFO L225 Difference]: With dead ends: 12915 [2023-04-02 20:39:33,431 INFO L226 Difference]: Without dead ends: 8316 [2023-04-02 20:39:33,441 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 [2023-04-02 20:39:33,442 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 3658 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 6961 mSolverCounterSat, 1184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3658 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 8145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1184 IncrementalHoareTripleChecker+Valid, 6961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2023-04-02 20:39:33,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3658 Valid, 159 Invalid, 8145 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1184 Valid, 6961 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2023-04-02 20:39:33,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8316 states. [2023-04-02 20:39:33,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8316 to 8220. [2023-04-02 20:39:33,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8220 states, 8029 states have (on average 1.5387968613775065) internal successors, (12355), 8053 states have internal predecessors, (12355), 38 states have call successors, (38), 38 states have call predecessors, (38), 152 states have return successors, (540), 128 states have call predecessors, (540), 37 states have call successors, (540) [2023-04-02 20:39:33,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8220 states to 8220 states and 12933 transitions. [2023-04-02 20:39:33,645 INFO L78 Accepts]: Start accepts. Automaton has 8220 states and 12933 transitions. Word has length 24 [2023-04-02 20:39:33,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 20:39:33,645 INFO L495 AbstractCegarLoop]: Abstraction has 8220 states and 12933 transitions. [2023-04-02 20:39:33,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2023-04-02 20:39:33,646 INFO L276 IsEmpty]: Start isEmpty. Operand 8220 states and 12933 transitions. [2023-04-02 20:39:33,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-02 20:39:33,647 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:39:33,647 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 20:39:33,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 20:39:33,648 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:39:33,648 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:39:33,649 INFO L85 PathProgramCache]: Analyzing trace with hash -479172139, now seen corresponding path program 1 times [2023-04-02 20:39:33,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:39:33,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283898370] [2023-04-02 20:39:33,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:39:33,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:39:33,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:39:33,815 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 20:39:33,816 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:39:33,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283898370] [2023-04-02 20:39:33,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283898370] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 20:39:33,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 20:39:33,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 20:39:33,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039664262] [2023-04-02 20:39:33,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 20:39:33,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 20:39:33,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 20:39:33,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 20:39:33,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 20:39:33,818 INFO L87 Difference]: Start difference. First operand 8220 states and 12933 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 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) [2023-04-02 20:39:41,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 20:39:41,915 INFO L93 Difference]: Finished difference Result 24578 states and 39444 transitions. [2023-04-02 20:39:41,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 20:39:41,916 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 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 41 [2023-04-02 20:39:41,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 20:39:41,988 INFO L225 Difference]: With dead ends: 24578 [2023-04-02 20:39:41,988 INFO L226 Difference]: Without dead ends: 16363 [2023-04-02 20:39:42,011 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 [2023-04-02 20:39:42,015 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 3696 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 7394 mSolverCounterSat, 1706 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3696 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 9100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1706 IncrementalHoareTripleChecker+Valid, 7394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2023-04-02 20:39:42,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3696 Valid, 224 Invalid, 9100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1706 Valid, 7394 Invalid, 0 Unknown, 0 Unchecked, 7.8s Time] [2023-04-02 20:39:42,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16363 states. [2023-04-02 20:39:42,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16363 to 15725. [2023-04-02 20:39:42,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15725 states, 15162 states have (on average 1.353185595567867) internal successors, (20517), 15262 states have internal predecessors, (20517), 68 states have call successors, (68), 68 states have call predecessors, (68), 494 states have return successors, (2106), 394 states have call predecessors, (2106), 67 states have call successors, (2106) [2023-04-02 20:39:42,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15725 states to 15725 states and 22691 transitions. [2023-04-02 20:39:42,434 INFO L78 Accepts]: Start accepts. Automaton has 15725 states and 22691 transitions. Word has length 41 [2023-04-02 20:39:42,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 20:39:42,434 INFO L495 AbstractCegarLoop]: Abstraction has 15725 states and 22691 transitions. [2023-04-02 20:39:42,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 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) [2023-04-02 20:39:42,435 INFO L276 IsEmpty]: Start isEmpty. Operand 15725 states and 22691 transitions. [2023-04-02 20:39:42,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-02 20:39:42,443 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:39:42,443 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2023-04-02 20:39:42,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 20:39:42,443 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:39:42,444 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:39:42,444 INFO L85 PathProgramCache]: Analyzing trace with hash -439821938, now seen corresponding path program 1 times [2023-04-02 20:39:42,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:39:42,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345216011] [2023-04-02 20:39:42,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:39:42,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:39:42,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:39:42,649 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 20:39:42,649 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:39:42,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345216011] [2023-04-02 20:39:42,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345216011] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 20:39:42,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641956352] [2023-04-02 20:39:42,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:39:42,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 20:39:42,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 20:39:42,657 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) [2023-04-02 20:39:42,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 20:39:42,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:39:42,769 INFO L262 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 20:39:42,777 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 20:39:42,862 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 20:39:42,867 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 20:39:42,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641956352] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 20:39:42,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 20:39:42,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-04-02 20:39:42,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424401708] [2023-04-02 20:39:42,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 20:39:42,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 20:39:42,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 20:39:42,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 20:39:42,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-02 20:39:42,870 INFO L87 Difference]: Start difference. First operand 15725 states and 22691 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 20:39:50,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 20:39:50,428 INFO L93 Difference]: Finished difference Result 47579 states and 71177 transitions. [2023-04-02 20:39:50,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 20:39:50,429 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 46 [2023-04-02 20:39:50,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 20:39:50,571 INFO L225 Difference]: With dead ends: 47579 [2023-04-02 20:39:50,571 INFO L226 Difference]: Without dead ends: 31859 [2023-04-02 20:39:50,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-04-02 20:39:50,632 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 5990 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 6259 mSolverCounterSat, 905 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5990 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 7164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 905 IncrementalHoareTripleChecker+Valid, 6259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2023-04-02 20:39:50,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5990 Valid, 125 Invalid, 7164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [905 Valid, 6259 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2023-04-02 20:39:50,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31859 states. [2023-04-02 20:39:51,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31859 to 26895. [2023-04-02 20:39:51,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26895 states, 25857 states have (on average 1.351819623312836) internal successors, (34954), 26053 states have internal predecessors, (34954), 115 states have call successors, (115), 115 states have call predecessors, (115), 922 states have return successors, (4107), 726 states have call predecessors, (4107), 114 states have call successors, (4107) [2023-04-02 20:39:51,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26895 states to 26895 states and 39176 transitions. [2023-04-02 20:39:51,491 INFO L78 Accepts]: Start accepts. Automaton has 26895 states and 39176 transitions. Word has length 46 [2023-04-02 20:39:51,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 20:39:51,491 INFO L495 AbstractCegarLoop]: Abstraction has 26895 states and 39176 transitions. [2023-04-02 20:39:51,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 20:39:51,492 INFO L276 IsEmpty]: Start isEmpty. Operand 26895 states and 39176 transitions. [2023-04-02 20:39:51,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-02 20:39:51,494 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:39:51,495 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2023-04-02 20:39:51,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 20:39:51,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 20:39:51,702 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:39:51,703 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:39:51,703 INFO L85 PathProgramCache]: Analyzing trace with hash 671865962, now seen corresponding path program 1 times [2023-04-02 20:39:51,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:39:51,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356079237] [2023-04-02 20:39:51,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:39:51,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:39:51,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:39:51,898 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 20:39:51,898 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:39:51,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356079237] [2023-04-02 20:39:51,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356079237] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 20:39:51,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353709514] [2023-04-02 20:39:51,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:39:51,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 20:39:51,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 20:39:51,900 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 20:39:51,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 20:39:52,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:39:52,009 INFO L262 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 20:39:52,013 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 20:39:52,098 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 20:39:52,098 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 20:39:52,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353709514] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 20:39:52,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 20:39:52,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-02 20:39:52,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852144946] [2023-04-02 20:39:52,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 20:39:52,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 20:39:52,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 20:39:52,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 20:39:52,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-02 20:39:52,100 INFO L87 Difference]: Start difference. First operand 26895 states and 39176 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 20:39:59,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 20:39:59,993 INFO L93 Difference]: Finished difference Result 79409 states and 122956 transitions. [2023-04-02 20:39:59,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 20:39:59,995 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 60 [2023-04-02 20:39:59,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 20:40:00,233 INFO L225 Difference]: With dead ends: 79409 [2023-04-02 20:40:00,233 INFO L226 Difference]: Without dead ends: 52519 [2023-04-02 20:40:00,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-04-02 20:40:00,326 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 3504 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 5888 mSolverCounterSat, 3182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3504 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 9070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3182 IncrementalHoareTripleChecker+Valid, 5888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2023-04-02 20:40:00,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3504 Valid, 135 Invalid, 9070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3182 Valid, 5888 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2023-04-02 20:40:00,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52519 states. [2023-04-02 20:40:01,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52519 to 51076. [2023-04-02 20:40:01,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51076 states, 49087 states have (on average 1.2769776111801496) internal successors, (62683), 49511 states have internal predecessors, (62683), 215 states have call successors, (215), 215 states have call predecessors, (215), 1773 states have return successors, (11075), 1349 states have call predecessors, (11075), 214 states have call successors, (11075) [2023-04-02 20:40:02,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51076 states to 51076 states and 73973 transitions. [2023-04-02 20:40:02,002 INFO L78 Accepts]: Start accepts. Automaton has 51076 states and 73973 transitions. Word has length 60 [2023-04-02 20:40:02,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 20:40:02,003 INFO L495 AbstractCegarLoop]: Abstraction has 51076 states and 73973 transitions. [2023-04-02 20:40:02,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 20:40:02,004 INFO L276 IsEmpty]: Start isEmpty. Operand 51076 states and 73973 transitions. [2023-04-02 20:40:02,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2023-04-02 20:40:02,013 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:40:02,013 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 20:40:02,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 20:40:02,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-04-02 20:40:02,224 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:40:02,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:40:02,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1619280016, now seen corresponding path program 1 times [2023-04-02 20:40:02,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:40:02,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270897670] [2023-04-02 20:40:02,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:40:02,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:40:02,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:40:02,701 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 56 proven. 39 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-04-02 20:40:02,701 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:40:02,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270897670] [2023-04-02 20:40:02,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270897670] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 20:40:02,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725768255] [2023-04-02 20:40:02,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:40:02,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 20:40:02,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 20:40:02,703 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 20:40:02,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 20:40:02,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:40:02,885 INFO L262 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 20:40:02,899 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 20:40:02,999 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 160 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 20:40:02,999 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 20:40:03,194 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 56 proven. 39 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-04-02 20:40:03,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725768255] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 20:40:03,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [745933989] [2023-04-02 20:40:03,244 INFO L159 IcfgInterpreter]: Started Sifa with 171 locations of interest [2023-04-02 20:40:03,244 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 20:40:03,247 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 20:40:03,252 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 20:40:03,252 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 20:40:03,401 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 56 for LOIs [2023-04-02 20:40:03,791 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 17 [2023-04-02 20:40:05,275 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 46124 conjuctions. This might take some time... [2023-04-02 20:40:08,777 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 622 conjuctions. [2023-04-02 20:40:29,921 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 44