/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_label19.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 20:36:58,330 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 20:36:58,332 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 20:36:58,371 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 20:36:58,372 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 20:36:58,375 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 20:36:58,379 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 20:36:58,381 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 20:36:58,383 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 20:36:58,389 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 20:36:58,390 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 20:36:58,390 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 20:36:58,391 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 20:36:58,391 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 20:36:58,392 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 20:36:58,393 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 20:36:58,393 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 20:36:58,394 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 20:36:58,395 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 20:36:58,397 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 20:36:58,398 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 20:36:58,401 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 20:36:58,403 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 20:36:58,404 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 20:36:58,413 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 20:36:58,413 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 20:36:58,413 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 20:36:58,415 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 20:36:58,415 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 20:36:58,416 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 20:36:58,417 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 20:36:58,417 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 20:36:58,418 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 20:36:58,419 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 20:36:58,420 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 20:36:58,420 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 20:36:58,420 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 20:36:58,421 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 20:36:58,421 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 20:36:58,421 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 20:36:58,422 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 20:36:58,423 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 20:36:58,458 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 20:36:58,458 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 20:36:58,459 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 20:36:58,459 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 20:36:58,460 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 20:36:58,460 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 20:36:58,460 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 20:36:58,460 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 20:36:58,460 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 20:36:58,461 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 20:36:58,461 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 20:36:58,461 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 20:36:58,462 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 20:36:58,462 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 20:36:58,462 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 20:36:58,462 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 20:36:58,462 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 20:36:58,462 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 20:36:58,463 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 20:36:58,463 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 20:36:58,463 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 20:36:58,463 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 20:36:58,463 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 20:36:58,463 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 20:36:58,463 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 20:36:58,464 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 20:36:58,464 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 20:36:58,464 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 20:36:58,464 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 20:36:58,464 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 20:36:58,464 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 20:36:58,465 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 20:36:58,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 20:36:58,465 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 20:36:58,465 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 20:36:58,465 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 20:36:58,465 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 20:36:58,465 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 20:36:58,466 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 20:36:58,466 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 20:36:58,466 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 20:36:58,466 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 20:36:58,677 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 20:36:58,700 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 20:36:58,702 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 20:36:58,704 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 20:36:58,704 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 20:36:58,705 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label19.c [2023-04-02 20:36:59,837 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 20:37:00,398 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 20:37:00,398 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label19.c [2023-04-02 20:37:00,444 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6008a5c29/f0923aaaf6b44ba5889cca4e8c5b4cea/FLAGaab678403 [2023-04-02 20:37:00,459 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6008a5c29/f0923aaaf6b44ba5889cca4e8c5b4cea [2023-04-02 20:37:00,463 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 20:37:00,465 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 20:37:00,466 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 20:37:00,466 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 20:37:00,469 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 20:37:00,469 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 08:37:00" (1/1) ... [2023-04-02 20:37:00,470 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12472302 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:37:00, skipping insertion in model container [2023-04-02 20:37:00,471 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 08:37:00" (1/1) ... [2023-04-02 20:37:00,476 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 20:37:00,637 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 20:37:00,890 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_label19.c[3491,3504] [2023-04-02 20:37:01,963 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 20:37:01,973 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 20:37:01,998 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_label19.c[3491,3504] [2023-04-02 20:37:02,647 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 20:37:02,680 INFO L208 MainTranslator]: Completed translation [2023-04-02 20:37:02,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:37:02 WrapperNode [2023-04-02 20:37:02,681 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 20:37:02,682 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 20:37:02,682 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 20:37:02,683 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 20:37:02,692 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:37:02" (1/1) ... [2023-04-02 20:37:02,693 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:37:02" (1/1) ... [2023-04-02 20:37:02,793 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:37:02" (1/1) ... [2023-04-02 20:37:02,794 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:37:02" (1/1) ... [2023-04-02 20:37:02,988 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:37:02" (1/1) ... [2023-04-02 20:37:03,024 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:37:02" (1/1) ... [2023-04-02 20:37:03,060 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:37:02" (1/1) ... [2023-04-02 20:37:03,081 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:37:02" (1/1) ... [2023-04-02 20:37:03,206 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 20:37:03,208 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 20:37:03,208 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 20:37:03,208 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 20:37:03,210 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:37:02" (1/1) ... [2023-04-02 20:37:03,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 20:37:03,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 20:37:03,242 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 20:37:03,249 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 20:37:03,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 20:37:03,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 20:37:03,277 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 20:37:03,277 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-02 20:37:03,277 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-02 20:37:03,277 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-02 20:37:03,277 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-02 20:37:03,277 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-04-02 20:37:03,277 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-04-02 20:37:03,277 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 20:37:03,278 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-02 20:37:03,278 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-02 20:37:03,278 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-02 20:37:03,278 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-02 20:37:03,278 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-04-02 20:37:03,278 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-04-02 20:37:03,279 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 20:37:03,279 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 20:37:03,279 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 20:37:03,279 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 20:37:03,279 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 20:37:03,279 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 20:37:03,279 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 20:37:03,280 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 20:37:03,280 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 20:37:03,280 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 20:37:03,280 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 20:37:03,280 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 20:37:03,280 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 20:37:03,373 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 20:37:03,375 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 20:37:10,681 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 20:37:24,721 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 20:37:24,721 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 20:37:24,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 08:37:24 BoogieIcfgContainer [2023-04-02 20:37:24,726 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 20:37:24,728 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 20:37:24,728 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 20:37:24,731 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 20:37:24,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 08:37:00" (1/3) ... [2023-04-02 20:37:24,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68b2c17a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 08:37:24, skipping insertion in model container [2023-04-02 20:37:24,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:37:02" (2/3) ... [2023-04-02 20:37:24,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68b2c17a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 08:37:24, skipping insertion in model container [2023-04-02 20:37:24,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 08:37:24" (3/3) ... [2023-04-02 20:37:24,733 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label19.c [2023-04-02 20:37:24,750 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 20:37:24,751 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 20:37:24,820 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 20:37:24,826 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;@ac96d4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 20:37:24,827 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 20:37:24,837 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 20:37:24,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-02 20:37:24,843 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:37:24,844 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 20:37:24,845 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:37:24,851 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:37:24,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1235896547, now seen corresponding path program 1 times [2023-04-02 20:37:24,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:37:24,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762805373] [2023-04-02 20:37:24,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:37:24,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:37:24,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:37:25,190 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 20:37:25,192 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:37:25,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762805373] [2023-04-02 20:37:25,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762805373] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 20:37:25,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 20:37:25,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 20:37:25,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305132300] [2023-04-02 20:37:25,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 20:37:25,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 20:37:25,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 20:37:25,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 20:37:25,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 20:37:25,239 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 20:37:31,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 20:37:31,207 INFO L93 Difference]: Finished difference Result 3418 states and 6741 transitions. [2023-04-02 20:37:31,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 20:37:31,214 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 20:37:31,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 20:37:31,247 INFO L225 Difference]: With dead ends: 3418 [2023-04-02 20:37:31,247 INFO L226 Difference]: Without dead ends: 2271 [2023-04-02 20:37:31,259 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 20:37:31,263 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 1159 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 3881 mSolverCounterSat, 937 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1159 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 4818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 937 IncrementalHoareTripleChecker+Valid, 3881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2023-04-02 20:37:31,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1159 Valid, 156 Invalid, 4818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [937 Valid, 3881 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2023-04-02 20:37:31,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2023-04-02 20:37:31,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 2229. [2023-04-02 20:37:31,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2229 states, 2203 states have (on average 1.9450748978665455) internal successors, (4285), 2203 states have internal predecessors, (4285), 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 20:37:31,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2229 states to 2229 states and 4320 transitions. [2023-04-02 20:37:31,407 INFO L78 Accepts]: Start accepts. Automaton has 2229 states and 4320 transitions. Word has length 11 [2023-04-02 20:37:31,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 20:37:31,408 INFO L495 AbstractCegarLoop]: Abstraction has 2229 states and 4320 transitions. [2023-04-02 20:37:31,409 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 20:37:31,409 INFO L276 IsEmpty]: Start isEmpty. Operand 2229 states and 4320 transitions. [2023-04-02 20:37:31,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-02 20:37:31,410 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:37:31,410 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] [2023-04-02 20:37:31,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 20:37:31,411 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:37:31,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:37:31,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1087979974, now seen corresponding path program 1 times [2023-04-02 20:37:31,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:37:31,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922896052] [2023-04-02 20:37:31,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:37:31,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:37:31,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:37:31,620 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 20:37:31,621 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:37:31,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922896052] [2023-04-02 20:37:31,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922896052] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 20:37:31,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 20:37:31,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 20:37:31,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596160084] [2023-04-02 20:37:31,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 20:37:31,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 20:37:31,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 20:37:31,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 20:37:31,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 20:37:31,624 INFO L87 Difference]: Start difference. First operand 2229 states and 4320 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 20:37:39,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 20:37:39,218 INFO L93 Difference]: Finished difference Result 6761 states and 13161 transitions. [2023-04-02 20:37:39,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 20:37:39,222 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 25 [2023-04-02 20:37:39,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 20:37:39,252 INFO L225 Difference]: With dead ends: 6761 [2023-04-02 20:37:39,253 INFO L226 Difference]: Without dead ends: 4537 [2023-04-02 20:37:39,259 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 20:37:39,260 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 3858 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 6431 mSolverCounterSat, 2062 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3858 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 8493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2062 IncrementalHoareTripleChecker+Valid, 6431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2023-04-02 20:37:39,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3858 Valid, 143 Invalid, 8493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2062 Valid, 6431 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2023-04-02 20:37:39,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4537 states. [2023-04-02 20:37:39,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4537 to 4490. [2023-04-02 20:37:39,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4490 states, 4427 states have (on average 1.8599503049469166) internal successors, (8234), 4431 states have internal predecessors, (8234), 23 states have call successors, (23), 23 states have call predecessors, (23), 39 states have return successors, (116), 35 states have call predecessors, (116), 22 states have call successors, (116) [2023-04-02 20:37:39,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4490 states to 4490 states and 8373 transitions. [2023-04-02 20:37:39,416 INFO L78 Accepts]: Start accepts. Automaton has 4490 states and 8373 transitions. Word has length 25 [2023-04-02 20:37:39,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 20:37:39,416 INFO L495 AbstractCegarLoop]: Abstraction has 4490 states and 8373 transitions. [2023-04-02 20:37:39,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 20:37:39,417 INFO L276 IsEmpty]: Start isEmpty. Operand 4490 states and 8373 transitions. [2023-04-02 20:37:39,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-02 20:37:39,418 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:37:39,418 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] [2023-04-02 20:37:39,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 20:37:39,418 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:37:39,420 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:37:39,420 INFO L85 PathProgramCache]: Analyzing trace with hash -756092674, now seen corresponding path program 1 times [2023-04-02 20:37:39,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:37:39,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588684345] [2023-04-02 20:37:39,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:37:39,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:37:39,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:37:39,590 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 20:37:39,590 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:37:39,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588684345] [2023-04-02 20:37:39,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588684345] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 20:37:39,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 20:37:39,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 20:37:39,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200667101] [2023-04-02 20:37:39,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 20:37:39,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 20:37:39,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 20:37:39,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 20:37:39,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 20:37:39,593 INFO L87 Difference]: Start difference. First operand 4490 states and 8373 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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 20:37:46,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 20:37:46,271 INFO L93 Difference]: Finished difference Result 12484 states and 23499 transitions. [2023-04-02 20:37:46,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 20:37:46,272 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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 28 [2023-04-02 20:37:46,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 20:37:46,308 INFO L225 Difference]: With dead ends: 12484 [2023-04-02 20:37:46,309 INFO L226 Difference]: Without dead ends: 7999 [2023-04-02 20:37:46,318 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 20:37:46,320 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 3880 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 6366 mSolverCounterSat, 2155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3880 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 8521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2155 IncrementalHoareTripleChecker+Valid, 6366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2023-04-02 20:37:46,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3880 Valid, 147 Invalid, 8521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2155 Valid, 6366 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2023-04-02 20:37:46,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7999 states. [2023-04-02 20:37:46,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7999 to 7941. [2023-04-02 20:37:46,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7941 states, 7809 states have (on average 1.7496478422333206) internal successors, (13663), 7821 states have internal predecessors, (13663), 38 states have call successors, (38), 38 states have call predecessors, (38), 93 states have return successors, (414), 81 states have call predecessors, (414), 37 states have call successors, (414) [2023-04-02 20:37:46,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7941 states to 7941 states and 14115 transitions. [2023-04-02 20:37:46,545 INFO L78 Accepts]: Start accepts. Automaton has 7941 states and 14115 transitions. Word has length 28 [2023-04-02 20:37:46,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 20:37:46,546 INFO L495 AbstractCegarLoop]: Abstraction has 7941 states and 14115 transitions. [2023-04-02 20:37:46,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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 20:37:46,546 INFO L276 IsEmpty]: Start isEmpty. Operand 7941 states and 14115 transitions. [2023-04-02 20:37:46,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-02 20:37:46,547 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:37:46,547 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] [2023-04-02 20:37:46,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 20:37:46,548 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:37:46,551 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:37:46,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1760040654, now seen corresponding path program 1 times [2023-04-02 20:37:46,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:37:46,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276447710] [2023-04-02 20:37:46,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:37:46,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:37:46,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:37:46,704 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 20:37:46,704 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:37:46,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276447710] [2023-04-02 20:37:46,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276447710] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 20:37:46,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 20:37:46,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 20:37:46,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002975795] [2023-04-02 20:37:46,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 20:37:46,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 20:37:46,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 20:37:46,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 20:37:46,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 20:37:46,707 INFO L87 Difference]: Start difference. First operand 7941 states and 14115 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 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 20:37:56,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-02 20:37:56,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 20:37:56,628 INFO L93 Difference]: Finished difference Result 23276 states and 42280 transitions. [2023-04-02 20:37:56,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 20:37:56,629 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 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 29 [2023-04-02 20:37:56,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 20:37:56,709 INFO L225 Difference]: With dead ends: 23276 [2023-04-02 20:37:56,709 INFO L226 Difference]: Without dead ends: 15340 [2023-04-02 20:37:56,733 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 20:37:56,734 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 3800 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 6874 mSolverCounterSat, 1737 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3800 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 8612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1737 IncrementalHoareTripleChecker+Valid, 6874 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2023-04-02 20:37:56,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3800 Valid, 181 Invalid, 8612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1737 Valid, 6874 Invalid, 1 Unknown, 0 Unchecked, 9.6s Time] [2023-04-02 20:37:56,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15340 states. [2023-04-02 20:37:57,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15340 to 15003. [2023-04-02 20:37:57,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15003 states, 14651 states have (on average 1.508361204013378) internal successors, (22099), 14701 states have internal predecessors, (22099), 68 states have call successors, (68), 68 states have call predecessors, (68), 283 states have return successors, (1704), 233 states have call predecessors, (1704), 67 states have call successors, (1704) [2023-04-02 20:37:57,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15003 states to 15003 states and 23871 transitions. [2023-04-02 20:37:57,191 INFO L78 Accepts]: Start accepts. Automaton has 15003 states and 23871 transitions. Word has length 29 [2023-04-02 20:37:57,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 20:37:57,192 INFO L495 AbstractCegarLoop]: Abstraction has 15003 states and 23871 transitions. [2023-04-02 20:37:57,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 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 20:37:57,193 INFO L276 IsEmpty]: Start isEmpty. Operand 15003 states and 23871 transitions. [2023-04-02 20:37:57,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-04-02 20:37:57,194 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:37:57,195 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] [2023-04-02 20:37:57,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 20:37:57,195 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:37:57,196 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:37:57,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1725444696, now seen corresponding path program 1 times [2023-04-02 20:37:57,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:37:57,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279468859] [2023-04-02 20:37:57,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:37:57,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:37:57,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:37:57,369 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 20:37:57,369 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:37:57,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279468859] [2023-04-02 20:37:57,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279468859] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 20:37:57,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410035756] [2023-04-02 20:37:57,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:37:57,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 20:37:57,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 20:37:57,377 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 20:37:57,408 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 20:37:57,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:37:57,492 INFO L262 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 20:37:57,499 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 20:37:57,564 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 20:37:57,565 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 20:37:57,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410035756] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 20:37:57,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 20:37:57,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-04-02 20:37:57,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991134444] [2023-04-02 20:37:57,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 20:37:57,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 20:37:57,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 20:37:57,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 20:37:57,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-02 20:37:57,567 INFO L87 Difference]: Start difference. First operand 15003 states and 23871 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 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 20:38:05,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 20:38:05,258 INFO L93 Difference]: Finished difference Result 43738 states and 73537 transitions. [2023-04-02 20:38:05,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 20:38:05,259 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 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 39 [2023-04-02 20:38:05,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 20:38:05,382 INFO L225 Difference]: With dead ends: 43738 [2023-04-02 20:38:05,382 INFO L226 Difference]: Without dead ends: 28740 [2023-04-02 20:38:05,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-04-02 20:38:05,419 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 4045 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 5945 mSolverCounterSat, 2440 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4045 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 8385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2440 IncrementalHoareTripleChecker+Valid, 5945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2023-04-02 20:38:05,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4045 Valid, 155 Invalid, 8385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2440 Valid, 5945 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2023-04-02 20:38:05,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28740 states. [2023-04-02 20:38:06,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28740 to 26647. [2023-04-02 20:38:06,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26647 states, 25827 states have (on average 1.3559840477020173) internal successors, (35021), 25973 states have internal predecessors, (35021), 117 states have call successors, (117), 117 states have call predecessors, (117), 702 states have return successors, (5303), 556 states have call predecessors, (5303), 116 states have call successors, (5303) [2023-04-02 20:38:06,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26647 states to 26647 states and 40441 transitions. [2023-04-02 20:38:06,139 INFO L78 Accepts]: Start accepts. Automaton has 26647 states and 40441 transitions. Word has length 39 [2023-04-02 20:38:06,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 20:38:06,139 INFO L495 AbstractCegarLoop]: Abstraction has 26647 states and 40441 transitions. [2023-04-02 20:38:06,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 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 20:38:06,139 INFO L276 IsEmpty]: Start isEmpty. Operand 26647 states and 40441 transitions. [2023-04-02 20:38:06,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-02 20:38:06,147 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:38:06,147 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2023-04-02 20:38:06,160 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 20:38:06,353 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 20:38:06,354 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:38:06,354 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:38:06,354 INFO L85 PathProgramCache]: Analyzing trace with hash -2124661216, now seen corresponding path program 1 times [2023-04-02 20:38:06,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:38:06,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507356837] [2023-04-02 20:38:06,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:38:06,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:38:06,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:38:06,580 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 20:38:06,581 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:38:06,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507356837] [2023-04-02 20:38:06,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507356837] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 20:38:06,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651200065] [2023-04-02 20:38:06,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:38:06,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 20:38:06,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 20:38:06,585 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 20:38:06,606 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 20:38:06,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:38:06,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 20:38:06,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 20:38:06,766 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 20:38:06,766 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 20:38:06,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651200065] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 20:38:06,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 20:38:06,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-02 20:38:06,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962622752] [2023-04-02 20:38:06,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 20:38:06,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 20:38:06,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 20:38:06,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 20:38:06,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-02 20:38:06,768 INFO L87 Difference]: Start difference. First operand 26647 states and 40441 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 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 20:38:14,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 20:38:14,735 INFO L93 Difference]: Finished difference Result 80007 states and 125911 transitions. [2023-04-02 20:38:14,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 20:38:14,736 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 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 56 [2023-04-02 20:38:14,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 20:38:14,964 INFO L225 Difference]: With dead ends: 80007 [2023-04-02 20:38:14,965 INFO L226 Difference]: Without dead ends: 53365 [2023-04-02 20:38:15,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 55 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 20:38:15,030 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 5986 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 6256 mSolverCounterSat, 909 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5986 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 7165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 909 IncrementalHoareTripleChecker+Valid, 6256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2023-04-02 20:38:15,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5986 Valid, 120 Invalid, 7165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [909 Valid, 6256 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2023-04-02 20:38:15,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53365 states. [2023-04-02 20:38:16,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53365 to 48615. [2023-04-02 20:38:16,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48615 states, 47060 states have (on average 1.326009349766256) internal successors, (62402), 47349 states have internal predecessors, (62402), 212 states have call successors, (212), 212 states have call predecessors, (212), 1342 states have return successors, (9855), 1053 states have call predecessors, (9855), 211 states have call successors, (9855) [2023-04-02 20:38:16,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48615 states to 48615 states and 72469 transitions. [2023-04-02 20:38:16,442 INFO L78 Accepts]: Start accepts. Automaton has 48615 states and 72469 transitions. Word has length 56 [2023-04-02 20:38:16,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 20:38:16,443 INFO L495 AbstractCegarLoop]: Abstraction has 48615 states and 72469 transitions. [2023-04-02 20:38:16,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 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 20:38:16,443 INFO L276 IsEmpty]: Start isEmpty. Operand 48615 states and 72469 transitions. [2023-04-02 20:38:16,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-04-02 20:38:16,447 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:38:16,448 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 20:38:16,455 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 20:38:16,652 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 20:38:16,653 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:38:16,654 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:38:16,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1186041618, now seen corresponding path program 1 times [2023-04-02 20:38:16,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:38:16,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749757755] [2023-04-02 20:38:16,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:38:16,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:38:16,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:38:16,895 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 20:38:16,896 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:38:16,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749757755] [2023-04-02 20:38:16,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749757755] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 20:38:16,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 20:38:16,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 20:38:16,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62586169] [2023-04-02 20:38:16,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 20:38:16,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 20:38:16,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 20:38:16,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 20:38:16,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 20:38:16,898 INFO L87 Difference]: Start difference. First operand 48615 states and 72469 transitions. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 20:38:22,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 20:38:22,386 INFO L93 Difference]: Finished difference Result 113219 states and 169822 transitions. [2023-04-02 20:38:22,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 20:38:22,386 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 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 163 [2023-04-02 20:38:22,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 20:38:22,657 INFO L225 Difference]: With dead ends: 113219 [2023-04-02 20:38:22,657 INFO L226 Difference]: Without dead ends: 64609 [2023-04-02 20:38:22,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 20:38:22,744 INFO L413 NwaCegarLoop]: 2086 mSDtfsCounter, 1134 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 3030 mSolverCounterSat, 1157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1134 SdHoareTripleChecker+Valid, 2126 SdHoareTripleChecker+Invalid, 4187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1157 IncrementalHoareTripleChecker+Valid, 3030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2023-04-02 20:38:22,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1134 Valid, 2126 Invalid, 4187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1157 Valid, 3030 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2023-04-02 20:38:22,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64609 states. [2023-04-02 20:38:24,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64609 to 62507. [2023-04-02 20:38:24,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62507 states, 60623 states have (on average 1.2712831763522097) internal successors, (77069), 60979 states have internal predecessors, (77069), 273 states have call successors, (273), 273 states have call predecessors, (273), 1610 states have return successors, (13135), 1254 states have call predecessors, (13135), 272 states have call successors, (13135) [2023-04-02 20:38:24,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62507 states to 62507 states and 90477 transitions. [2023-04-02 20:38:24,565 INFO L78 Accepts]: Start accepts. Automaton has 62507 states and 90477 transitions. Word has length 163 [2023-04-02 20:38:24,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 20:38:24,566 INFO L495 AbstractCegarLoop]: Abstraction has 62507 states and 90477 transitions. [2023-04-02 20:38:24,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 20:38:24,566 INFO L276 IsEmpty]: Start isEmpty. Operand 62507 states and 90477 transitions. [2023-04-02 20:38:24,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2023-04-02 20:38:24,574 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:38:24,575 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:38:24,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-02 20:38:24,575 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:38:24,575 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:38:24,575 INFO L85 PathProgramCache]: Analyzing trace with hash 855117266, now seen corresponding path program 1 times [2023-04-02 20:38:24,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:38:24,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393458941] [2023-04-02 20:38:24,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:38:24,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:38:24,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:38:25,917 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-02 20:38:25,917 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:38:25,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393458941] [2023-04-02 20:38:25,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393458941] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 20:38:25,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519544452] [2023-04-02 20:38:25,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:38:25,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 20:38:25,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 20:38:25,921 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 20:38:25,925 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 20:38:26,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:38:26,125 INFO L262 TraceCheckSpWp]: Trace formula consists of 739 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 20:38:26,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 20:38:26,197 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 20:38:26,197 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 20:38:26,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519544452] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 20:38:26,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 20:38:26,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-04-02 20:38:26,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794019035] [2023-04-02 20:38:26,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 20:38:26,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 20:38:26,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 20:38:26,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 20:38:26,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 20:38:26,201 INFO L87 Difference]: Start difference. First operand 62507 states and 90477 transitions. Second operand has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 20:38:32,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 20:38:32,317 INFO L93 Difference]: Finished difference Result 142871 states and 211043 transitions. [2023-04-02 20:38:32,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 20:38:32,318 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 447 [2023-04-02 20:38:32,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 20:38:32,563 INFO L225 Difference]: With dead ends: 142871 [2023-04-02 20:38:32,563 INFO L226 Difference]: Without dead ends: 80369 [2023-04-02 20:38:32,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 452 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 20:38:32,631 INFO L413 NwaCegarLoop]: 773 mSDtfsCounter, 1137 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 3913 mSolverCounterSat, 635 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1137 SdHoareTripleChecker+Valid, 804 SdHoareTripleChecker+Invalid, 4548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 635 IncrementalHoareTripleChecker+Valid, 3913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2023-04-02 20:38:32,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1137 Valid, 804 Invalid, 4548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [635 Valid, 3913 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2023-04-02 20:38:32,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80369 states. [2023-04-02 20:38:34,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80369 to 76926. [2023-04-02 20:38:34,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76926 states, 74809 states have (on average 1.230520391931452) internal successors, (92054), 75203 states have internal predecessors, (92054), 339 states have call successors, (339), 339 states have call predecessors, (339), 1777 states have return successors, (16309), 1383 states have call predecessors, (16309), 338 states have call successors, (16309) [2023-04-02 20:38:34,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76926 states to 76926 states and 108702 transitions. [2023-04-02 20:38:34,266 INFO L78 Accepts]: Start accepts. Automaton has 76926 states and 108702 transitions. Word has length 447 [2023-04-02 20:38:34,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 20:38:34,268 INFO L495 AbstractCegarLoop]: Abstraction has 76926 states and 108702 transitions. [2023-04-02 20:38:34,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 20:38:34,268 INFO L276 IsEmpty]: Start isEmpty. Operand 76926 states and 108702 transitions. [2023-04-02 20:38:34,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 574 [2023-04-02 20:38:34,278 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:38:34,278 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:38:34,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 20:38:34,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 20:38:34,485 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:38:34,486 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:38:34,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1945611815, now seen corresponding path program 1 times [2023-04-02 20:38:34,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:38:34,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044630114] [2023-04-02 20:38:34,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:38:34,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:38:34,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:38:35,780 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-04-02 20:38:35,780 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:38:35,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044630114] [2023-04-02 20:38:35,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044630114] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 20:38:35,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 20:38:35,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 20:38:35,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726501574] [2023-04-02 20:38:35,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 20:38:35,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 20:38:35,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 20:38:35,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 20:38:35,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 20:38:35,783 INFO L87 Difference]: Start difference. First operand 76926 states and 108702 transitions. Second operand has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-02 20:38:40,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-02 20:38:44,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 20:38:44,404 INFO L93 Difference]: Finished difference Result 193561 states and 281151 transitions. [2023-04-02 20:38:44,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 20:38:44,405 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 573 [2023-04-02 20:38:44,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 20:38:44,987 INFO L225 Difference]: With dead ends: 193561 [2023-04-02 20:38:44,988 INFO L226 Difference]: Without dead ends: 116640 [2023-04-02 20:38:45,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 20:38:45,051 INFO L413 NwaCegarLoop]: 1416 mSDtfsCounter, 1196 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 3866 mSolverCounterSat, 792 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1196 SdHoareTripleChecker+Valid, 1456 SdHoareTripleChecker+Invalid, 4659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 792 IncrementalHoareTripleChecker+Valid, 3866 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2023-04-02 20:38:45,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1196 Valid, 1456 Invalid, 4659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [792 Valid, 3866 Invalid, 1 Unknown, 0 Unchecked, 7.5s Time] [2023-04-02 20:38:45,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116640 states. [2023-04-02 20:38:46,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116640 to 112042. [2023-04-02 20:38:46,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112042 states, 109592 states have (on average 1.2314949996350097) internal successors, (134962), 110008 states have internal predecessors, (134962), 499 states have call successors, (499), 499 states have call predecessors, (499), 1950 states have return successors, (25171), 1534 states have call predecessors, (25171), 498 states have call successors, (25171) [2023-04-02 20:38:47,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112042 states to 112042 states and 160632 transitions. [2023-04-02 20:38:47,437 INFO L78 Accepts]: Start accepts. Automaton has 112042 states and 160632 transitions. Word has length 573 [2023-04-02 20:38:47,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 20:38:47,438 INFO L495 AbstractCegarLoop]: Abstraction has 112042 states and 160632 transitions. [2023-04-02 20:38:47,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-02 20:38:47,438 INFO L276 IsEmpty]: Start isEmpty. Operand 112042 states and 160632 transitions. [2023-04-02 20:38:47,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 663 [2023-04-02 20:38:47,454 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:38:47,454 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:38:47,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-02 20:38:47,454 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:38:47,455 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:38:47,455 INFO L85 PathProgramCache]: Analyzing trace with hash 639418375, now seen corresponding path program 1 times [2023-04-02 20:38:47,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:38:47,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726285017] [2023-04-02 20:38:47,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:38:47,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:38:47,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:38:48,538 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 103 proven. 44 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2023-04-02 20:38:48,538 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:38:48,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726285017] [2023-04-02 20:38:48,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726285017] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 20:38:48,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113551440] [2023-04-02 20:38:48,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:38:48,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 20:38:48,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 20:38:48,540 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 20:38:48,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 20:38:48,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:38:48,885 INFO L262 TraceCheckSpWp]: Trace formula consists of 1284 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 20:38:48,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 20:38:48,988 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 208 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-04-02 20:38:48,988 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 20:38:49,195 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 103 proven. 44 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2023-04-02 20:38:49,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113551440] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 20:38:49,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [702051648] [2023-04-02 20:38:49,224 INFO L159 IcfgInterpreter]: Started Sifa with 539 locations of interest [2023-04-02 20:38:49,224 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 20:38:49,228 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 20:38:49,233 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 20:38:49,233 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 20:38:49,366 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 56 for LOIs [2023-04-02 20:38:50,219 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 18 [2023-04-02 20:38:50,624 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 42928 conjuctions. This might take some time... [2023-04-02 20:38:54,072 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 1070 conjuctions. [2023-04-02 20:39:02,658 WARN L223 SmtUtils]: Spent 5.50s on a formula simplification that was a NOOP. DAG size: 665 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-02 20:39:31,050 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 43