/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain IntervalDomain -i ../sv-benchmarks/c/eca-rers2012/Problem19_label50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:32:55,397 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:32:55,398 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:32:55,428 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:32:55,428 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:32:55,430 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:32:55,432 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:32:55,433 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:32:55,434 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:32:55,438 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:32:55,439 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:32:55,440 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:32:55,440 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:32:55,442 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:32:55,443 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:32:55,445 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:32:55,445 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:32:55,446 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:32:55,447 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:32:55,451 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:32:55,451 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:32:55,452 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:32:55,453 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:32:55,454 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:32:55,459 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 22:32:55,460 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 22:32:55,460 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 22:32:55,461 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 22:32:55,461 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 22:32:55,461 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 22:32:55,462 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:32:55,462 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:32:55,463 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:32:55,463 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:32:55,464 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:32:55,464 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:32:55,464 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:32:55,464 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:32:55,464 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:32:55,465 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:32:55,465 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:32:55,466 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-03-31 22:32:55,486 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:32:55,487 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:32:55,487 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:32:55,487 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:32:55,488 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:32:55,488 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:32:55,488 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:32:55,488 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:32:55,488 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:32:55,488 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:32:55,489 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:32:55,489 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:32:55,489 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:32:55,489 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:32:55,489 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:32:55,489 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:32:55,490 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:32:55,490 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:32:55,490 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:32:55,490 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:32:55,490 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:32:55,490 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:32:55,490 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:32:55,491 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:32:55,491 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:32:55,491 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:32:55,491 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:32:55,491 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:32:55,491 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:32:55,491 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:32:55,491 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:32:55,491 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:32:55,492 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:32:55,492 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:32:55,492 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:32:55,492 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:32:55,492 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:32:55,492 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:32:55,492 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:32:55,492 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:32:55,492 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:32:55,492 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:32:55,679 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:32:55,698 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:32:55,700 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:32:55,700 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:32:55,701 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:32:55,701 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label50.c [2023-03-31 22:32:56,627 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:32:57,052 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:32:57,052 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label50.c [2023-03-31 22:32:57,085 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28aaea4bd/ed13d070292841c69c7efdfd7b8220f2/FLAG05b1eca82 [2023-03-31 22:32:57,097 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28aaea4bd/ed13d070292841c69c7efdfd7b8220f2 [2023-03-31 22:32:57,098 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:32:57,099 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:32:57,101 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:32:57,101 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:32:57,103 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:32:57,104 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:32:57" (1/1) ... [2023-03-31 22:32:57,104 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4665befc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:32:57, skipping insertion in model container [2023-03-31 22:32:57,105 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:32:57" (1/1) ... [2023-03-31 22:32:57,109 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:32:57,241 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:32:57,469 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_label50.c[3006,3019] [2023-03-31 22:32:58,365 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:32:58,374 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:32:58,397 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_label50.c[3006,3019] [2023-03-31 22:32:58,874 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:32:58,899 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:32:58,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:32:58 WrapperNode [2023-03-31 22:32:58,899 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:32:58,901 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:32:58,901 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:32:58,901 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:32:58,909 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:32:58" (1/1) ... [2023-03-31 22:32:58,909 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:32:58" (1/1) ... [2023-03-31 22:32:58,982 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:32:58" (1/1) ... [2023-03-31 22:32:58,982 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:32:58" (1/1) ... [2023-03-31 22:32:59,099 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:32:58" (1/1) ... [2023-03-31 22:32:59,231 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:32:58" (1/1) ... [2023-03-31 22:32:59,273 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:32:58" (1/1) ... [2023-03-31 22:32:59,289 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:32:58" (1/1) ... [2023-03-31 22:32:59,384 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:32:59,385 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:32:59,385 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:32:59,385 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:32:59,386 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:32:58" (1/1) ... [2023-03-31 22:32:59,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:32:59,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:32:59,414 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-31 22:32:59,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-31 22:32:59,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:32:59,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:32:59,452 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:32:59,453 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 22:32:59,453 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 22:32:59,453 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-31 22:32:59,453 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-03-31 22:32:59,453 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-03-31 22:32:59,453 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-03-31 22:32:59,453 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:32:59,453 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 22:32:59,453 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 22:32:59,453 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-31 22:32:59,453 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-03-31 22:32:59,453 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-03-31 22:32:59,453 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-03-31 22:32:59,453 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:32:59,454 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:32:59,454 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:32:59,454 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:32:59,454 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:32:59,454 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:32:59,454 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:32:59,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:32:59,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:32:59,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:32:59,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:32:59,454 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:32:59,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:32:59,527 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:32:59,528 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:33:04,934 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:33:18,713 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:33:18,714 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 22:33:18,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:33:18 BoogieIcfgContainer [2023-03-31 22:33:18,718 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:33:18,736 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:33:18,737 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:33:18,739 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:33:18,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:32:57" (1/3) ... [2023-03-31 22:33:18,739 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b4b8ecc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:33:18, skipping insertion in model container [2023-03-31 22:33:18,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:32:58" (2/3) ... [2023-03-31 22:33:18,740 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b4b8ecc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:33:18, skipping insertion in model container [2023-03-31 22:33:18,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:33:18" (3/3) ... [2023-03-31 22:33:18,741 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label50.c [2023-03-31 22:33:18,767 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:33:18,768 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:33:18,898 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:33:18,904 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;@6d750597, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:33:18,904 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:33:18,912 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) [2023-03-31 22:33:18,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 22:33:18,917 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:33:18,917 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:33:18,919 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:33:18,923 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:33:18,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1235895523, now seen corresponding path program 1 times [2023-03-31 22:33:18,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:33:18,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430037151] [2023-03-31 22:33:18,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:33:18,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:33:19,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:33:19,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:33:19,126 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:33:19,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430037151] [2023-03-31 22:33:19,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430037151] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:33:19,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:33:19,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:33:19,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384110608] [2023-03-31 22:33:19,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:33:19,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:33:19,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:33:19,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:33:19,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:33:19,150 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) [2023-03-31 22:33:24,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:33:24,328 INFO L93 Difference]: Finished difference Result 3418 states and 6741 transitions. [2023-03-31 22:33:24,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:33:24,331 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-03-31 22:33:24,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:33:24,357 INFO L225 Difference]: With dead ends: 3418 [2023-03-31 22:33:24,357 INFO L226 Difference]: Without dead ends: 2271 [2023-03-31 22:33:24,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:33:24,364 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 1292 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 3267 mSolverCounterSat, 1820 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1292 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 5087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1820 IncrementalHoareTripleChecker+Valid, 3267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2023-03-31 22:33:24,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1292 Valid, 239 Invalid, 5087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1820 Valid, 3267 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2023-03-31 22:33:24,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2023-03-31 22:33:24,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 2265. [2023-03-31 22:33:24,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2265 states, 2239 states have (on average 1.9004019651630193) internal successors, (4255), 2239 states have internal predecessors, (4255), 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) [2023-03-31 22:33:24,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2265 states to 2265 states and 4290 transitions. [2023-03-31 22:33:24,559 INFO L78 Accepts]: Start accepts. Automaton has 2265 states and 4290 transitions. Word has length 11 [2023-03-31 22:33:24,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:33:24,560 INFO L495 AbstractCegarLoop]: Abstraction has 2265 states and 4290 transitions. [2023-03-31 22:33:24,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:33:24,560 INFO L276 IsEmpty]: Start isEmpty. Operand 2265 states and 4290 transitions. [2023-03-31 22:33:24,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-03-31 22:33:24,564 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:33:24,564 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] [2023-03-31 22:33:24,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:33:24,564 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:33:24,566 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:33:24,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1145092928, now seen corresponding path program 1 times [2023-03-31 22:33:24,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:33:24,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055565214] [2023-03-31 22:33:24,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:33:24,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:33:24,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:33:24,787 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:33:24,788 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:33:24,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055565214] [2023-03-31 22:33:24,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055565214] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:33:24,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:33:24,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:33:24,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600791812] [2023-03-31 22:33:24,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:33:24,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:33:24,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:33:24,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:33:24,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:33:24,790 INFO L87 Difference]: Start difference. First operand 2265 states and 4290 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:33:32,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:33:32,363 INFO L93 Difference]: Finished difference Result 6873 states and 13056 transitions. [2023-03-31 22:33:32,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 22:33:32,364 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 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 47 [2023-03-31 22:33:32,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:33:32,379 INFO L225 Difference]: With dead ends: 6873 [2023-03-31 22:33:32,379 INFO L226 Difference]: Without dead ends: 4613 [2023-03-31 22:33:32,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-03-31 22:33:32,384 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 3698 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 7246 mSolverCounterSat, 1323 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3698 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 8569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1323 IncrementalHoareTripleChecker+Valid, 7246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2023-03-31 22:33:32,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3698 Valid, 139 Invalid, 8569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1323 Valid, 7246 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2023-03-31 22:33:32,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4613 states. [2023-03-31 22:33:32,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4613 to 4575. [2023-03-31 22:33:32,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4575 states, 4509 states have (on average 1.5917054779330229) internal successors, (7177), 4513 states have internal predecessors, (7177), 23 states have call successors, (23), 23 states have call predecessors, (23), 42 states have return successors, (122), 38 states have call predecessors, (122), 22 states have call successors, (122) [2023-03-31 22:33:32,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4575 states to 4575 states and 7322 transitions. [2023-03-31 22:33:32,474 INFO L78 Accepts]: Start accepts. Automaton has 4575 states and 7322 transitions. Word has length 47 [2023-03-31 22:33:32,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:33:32,475 INFO L495 AbstractCegarLoop]: Abstraction has 4575 states and 7322 transitions. [2023-03-31 22:33:32,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:33:32,476 INFO L276 IsEmpty]: Start isEmpty. Operand 4575 states and 7322 transitions. [2023-03-31 22:33:32,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-03-31 22:33:32,479 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:33:32,480 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:33:32,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 22:33:32,480 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:33:32,480 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:33:32,480 INFO L85 PathProgramCache]: Analyzing trace with hash -2015950074, now seen corresponding path program 1 times [2023-03-31 22:33:32,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:33:32,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716466017] [2023-03-31 22:33:32,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:33:32,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:33:32,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:33:32,735 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 22:33:32,735 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:33:32,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716466017] [2023-03-31 22:33:32,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716466017] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:33:32,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92314338] [2023-03-31 22:33:32,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:33:32,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:33:32,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:33:32,768 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:33:32,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 22:33:32,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:33:32,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 22:33:32,889 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:33:32,945 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 22:33:32,945 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 22:33:32,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92314338] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:33:32,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 22:33:32,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-03-31 22:33:32,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354586963] [2023-03-31 22:33:32,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:33:32,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:33:32,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:33:32,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:33:32,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-31 22:33:32,950 INFO L87 Difference]: Start difference. First operand 4575 states and 7322 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 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) [2023-03-31 22:33:39,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:33:39,514 INFO L93 Difference]: Finished difference Result 14085 states and 22931 transitions. [2023-03-31 22:33:39,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:33:39,529 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 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 57 [2023-03-31 22:33:39,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:33:39,574 INFO L225 Difference]: With dead ends: 14085 [2023-03-31 22:33:39,574 INFO L226 Difference]: Without dead ends: 9515 [2023-03-31 22:33:39,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-03-31 22:33:39,604 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 4043 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 5945 mSolverCounterSat, 2439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4043 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 8384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2439 IncrementalHoareTripleChecker+Valid, 5945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2023-03-31 22:33:39,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4043 Valid, 157 Invalid, 8384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2439 Valid, 5945 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2023-03-31 22:33:39,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9515 states. [2023-03-31 22:33:39,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9515 to 9355. [2023-03-31 22:33:39,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9355 states, 9149 states have (on average 1.3785113127117719) internal successors, (12612), 9177 states have internal predecessors, (12612), 43 states have call successors, (43), 43 states have call predecessors, (43), 162 states have return successors, (619), 134 states have call predecessors, (619), 42 states have call successors, (619) [2023-03-31 22:33:39,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9355 states to 9355 states and 13274 transitions. [2023-03-31 22:33:39,989 INFO L78 Accepts]: Start accepts. Automaton has 9355 states and 13274 transitions. Word has length 57 [2023-03-31 22:33:39,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:33:39,989 INFO L495 AbstractCegarLoop]: Abstraction has 9355 states and 13274 transitions. [2023-03-31 22:33:39,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 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) [2023-03-31 22:33:39,989 INFO L276 IsEmpty]: Start isEmpty. Operand 9355 states and 13274 transitions. [2023-03-31 22:33:39,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-03-31 22:33:39,994 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:33:39,994 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2023-03-31 22:33:39,999 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-03-31 22:33:40,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:33:40,199 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:33:40,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:33:40,200 INFO L85 PathProgramCache]: Analyzing trace with hash 894911410, now seen corresponding path program 1 times [2023-03-31 22:33:40,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:33:40,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329466623] [2023-03-31 22:33:40,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:33:40,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:33:40,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:33:40,397 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-03-31 22:33:40,397 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:33:40,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329466623] [2023-03-31 22:33:40,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329466623] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:33:40,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84822754] [2023-03-31 22:33:40,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:33:40,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:33:40,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:33:40,416 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) [2023-03-31 22:33:40,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 22:33:40,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:33:40,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 22:33:40,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:33:40,596 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-03-31 22:33:40,597 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 22:33:40,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84822754] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:33:40,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 22:33:40,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-03-31 22:33:40,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998391749] [2023-03-31 22:33:40,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:33:40,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:33:40,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:33:40,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:33:40,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:33:40,600 INFO L87 Difference]: Start difference. First operand 9355 states and 13274 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 22:33:46,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:33:46,584 INFO L93 Difference]: Finished difference Result 28531 states and 42490 transitions. [2023-03-31 22:33:46,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:33:46,585 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 72 [2023-03-31 22:33:46,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:33:46,633 INFO L225 Difference]: With dead ends: 28531 [2023-03-31 22:33:46,633 INFO L226 Difference]: Without dead ends: 19181 [2023-03-31 22:33:46,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-03-31 22:33:46,649 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 3499 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 6928 mSolverCounterSat, 1511 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3499 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 8439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1511 IncrementalHoareTripleChecker+Valid, 6928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2023-03-31 22:33:46,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3499 Valid, 148 Invalid, 8439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1511 Valid, 6928 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2023-03-31 22:33:46,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19181 states. [2023-03-31 22:33:46,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19181 to 17066. [2023-03-31 22:33:46,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17066 states, 16583 states have (on average 1.3869022492914431) internal successors, (22999), 16665 states have internal predecessors, (22999), 77 states have call successors, (77), 77 states have call predecessors, (77), 405 states have return successors, (2379), 323 states have call predecessors, (2379), 76 states have call successors, (2379) [2023-03-31 22:33:46,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17066 states to 17066 states and 25455 transitions. [2023-03-31 22:33:46,980 INFO L78 Accepts]: Start accepts. Automaton has 17066 states and 25455 transitions. Word has length 72 [2023-03-31 22:33:46,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:33:46,982 INFO L495 AbstractCegarLoop]: Abstraction has 17066 states and 25455 transitions. [2023-03-31 22:33:46,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 22:33:46,984 INFO L276 IsEmpty]: Start isEmpty. Operand 17066 states and 25455 transitions. [2023-03-31 22:33:46,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-03-31 22:33:46,989 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:33:46,989 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:33:47,011 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-03-31 22:33:47,211 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,SelfDestructingSolverStorable3 [2023-03-31 22:33:47,212 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:33:47,212 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:33:47,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1147799748, now seen corresponding path program 1 times [2023-03-31 22:33:47,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:33:47,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145787538] [2023-03-31 22:33:47,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:33:47,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:33:47,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:33:47,397 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-03-31 22:33:47,397 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:33:47,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145787538] [2023-03-31 22:33:47,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145787538] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:33:47,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389767206] [2023-03-31 22:33:47,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:33:47,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:33:47,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:33:47,398 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) [2023-03-31 22:33:47,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 22:33:47,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:33:47,496 INFO L262 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 22:33:47,501 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:33:47,531 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-03-31 22:33:47,531 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 22:33:47,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389767206] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:33:47,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 22:33:47,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-03-31 22:33:47,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020124362] [2023-03-31 22:33:47,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:33:47,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:33:47,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:33:47,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:33:47,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-31 22:33:47,533 INFO L87 Difference]: Start difference. First operand 17066 states and 25455 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 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) [2023-03-31 22:33:53,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:33:53,371 INFO L93 Difference]: Finished difference Result 51435 states and 79554 transitions. [2023-03-31 22:33:53,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:33:53,373 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 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 82 [2023-03-31 22:33:53,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:33:53,459 INFO L225 Difference]: With dead ends: 51435 [2023-03-31 22:33:53,459 INFO L226 Difference]: Without dead ends: 34374 [2023-03-31 22:33:53,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-03-31 22:33:53,488 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 5990 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 6260 mSolverCounterSat, 906 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5990 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 7166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 906 IncrementalHoareTripleChecker+Valid, 6260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2023-03-31 22:33:53,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5990 Valid, 125 Invalid, 7166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [906 Valid, 6260 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2023-03-31 22:33:53,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34374 states. [2023-03-31 22:33:53,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34374 to 30328. [2023-03-31 22:33:53,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30328 states, 29317 states have (on average 1.3649759525190164) internal successors, (40017), 29507 states have internal predecessors, (40017), 135 states have call successors, (135), 135 states have call predecessors, (135), 875 states have return successors, (5015), 685 states have call predecessors, (5015), 134 states have call successors, (5015) [2023-03-31 22:33:54,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30328 states to 30328 states and 45167 transitions. [2023-03-31 22:33:54,042 INFO L78 Accepts]: Start accepts. Automaton has 30328 states and 45167 transitions. Word has length 82 [2023-03-31 22:33:54,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:33:54,043 INFO L495 AbstractCegarLoop]: Abstraction has 30328 states and 45167 transitions. [2023-03-31 22:33:54,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 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) [2023-03-31 22:33:54,043 INFO L276 IsEmpty]: Start isEmpty. Operand 30328 states and 45167 transitions. [2023-03-31 22:33:54,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-03-31 22:33:54,044 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:33:54,044 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:33:54,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 22:33:54,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:33:54,249 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:33:54,249 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:33:54,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1006773465, now seen corresponding path program 1 times [2023-03-31 22:33:54,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:33:54,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362420547] [2023-03-31 22:33:54,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:33:54,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:33:54,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:33:54,429 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 15 proven. 38 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-03-31 22:33:54,429 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:33:54,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362420547] [2023-03-31 22:33:54,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362420547] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:33:54,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110265304] [2023-03-31 22:33:54,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:33:54,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:33:54,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:33:54,449 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) [2023-03-31 22:33:54,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 22:33:54,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:33:54,593 INFO L262 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 22:33:54,599 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:33:54,670 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-03-31 22:33:54,670 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 22:33:54,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110265304] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:33:54,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 22:33:54,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-03-31 22:33:54,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336050562] [2023-03-31 22:33:54,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:33:54,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:33:54,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:33:54,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:33:54,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:33:54,671 INFO L87 Difference]: Start difference. First operand 30328 states and 45167 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 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)