/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/Problem03_label28.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 21:19:52,346 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 21:19:52,348 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 21:19:52,373 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 21:19:52,373 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 21:19:52,374 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 21:19:52,375 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 21:19:52,376 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 21:19:52,377 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 21:19:52,378 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 21:19:52,379 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 21:19:52,380 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 21:19:52,380 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 21:19:52,381 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 21:19:52,382 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 21:19:52,382 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 21:19:52,383 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 21:19:52,384 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 21:19:52,387 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 21:19:52,388 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 21:19:52,389 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 21:19:52,394 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 21:19:52,395 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 21:19:52,396 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 21:19:52,398 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 21:19:52,399 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 21:19:52,399 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 21:19:52,399 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 21:19:52,400 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 21:19:52,400 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 21:19:52,400 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 21:19:52,401 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 21:19:52,402 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 21:19:52,402 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 21:19:52,403 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 21:19:52,403 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 21:19:52,404 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 21:19:52,404 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 21:19:52,404 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 21:19:52,405 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 21:19:52,405 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 21:19:52,406 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 21:19:52,425 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 21:19:52,426 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 21:19:52,426 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 21:19:52,426 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 21:19:52,427 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 21:19:52,427 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 21:19:52,427 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 21:19:52,427 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 21:19:52,427 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 21:19:52,427 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 21:19:52,427 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 21:19:52,428 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 21:19:52,428 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 21:19:52,428 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 21:19:52,428 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 21:19:52,428 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 21:19:52,428 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 21:19:52,428 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 21:19:52,429 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 21:19:52,429 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 21:19:52,429 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 21:19:52,429 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 21:19:52,429 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 21:19:52,430 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 21:19:52,430 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 21:19:52,430 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 21:19:52,430 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 21:19:52,430 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 21:19:52,430 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 21:19:52,430 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 21:19:52,431 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 21:19:52,431 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 21:19:52,431 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:19:52,431 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 21:19:52,431 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 21:19:52,431 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 21:19:52,431 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 21:19:52,431 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 21:19:52,431 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 21:19:52,432 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 21:19:52,432 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 21:19:52,432 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 21:19:52,610 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 21:19:52,626 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 21:19:52,628 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 21:19:52,629 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 21:19:52,629 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 21:19:52,630 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label28.c [2023-03-31 21:19:53,753 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 21:19:54,051 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 21:19:54,051 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label28.c [2023-03-31 21:19:54,066 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a65842442/f7e6cf77e4bb49149919ca92cc08a85f/FLAG933a25f42 [2023-03-31 21:19:54,080 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a65842442/f7e6cf77e4bb49149919ca92cc08a85f [2023-03-31 21:19:54,081 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 21:19:54,082 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 21:19:54,085 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 21:19:54,085 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 21:19:54,088 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 21:19:54,089 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:19:54" (1/1) ... [2023-03-31 21:19:54,090 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b4c2192 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:19:54, skipping insertion in model container [2023-03-31 21:19:54,090 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:19:54" (1/1) ... [2023-03-31 21:19:54,095 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 21:19:54,147 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 21:19:54,463 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/Problem03_label28.c[54731,54744] [2023-03-31 21:19:54,489 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:19:54,496 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 21:19:54,659 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/Problem03_label28.c[54731,54744] [2023-03-31 21:19:54,671 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:19:54,683 INFO L208 MainTranslator]: Completed translation [2023-03-31 21:19:54,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:19:54 WrapperNode [2023-03-31 21:19:54,684 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 21:19:54,685 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 21:19:54,685 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 21:19:54,685 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 21:19:54,694 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:19:54" (1/1) ... [2023-03-31 21:19:54,694 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:19:54" (1/1) ... [2023-03-31 21:19:54,740 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:19:54" (1/1) ... [2023-03-31 21:19:54,741 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:19:54" (1/1) ... [2023-03-31 21:19:54,817 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:19:54" (1/1) ... [2023-03-31 21:19:54,823 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:19:54" (1/1) ... [2023-03-31 21:19:54,835 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:19:54" (1/1) ... [2023-03-31 21:19:54,842 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:19:54" (1/1) ... [2023-03-31 21:19:54,853 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 21:19:54,854 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 21:19:54,854 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 21:19:54,854 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 21:19:54,855 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:19:54" (1/1) ... [2023-03-31 21:19:54,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:19:54,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:19:54,877 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 21:19:54,882 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 21:19:54,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 21:19:54,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 21:19:54,902 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 21:19:54,902 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 21:19:54,903 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 21:19:54,903 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 21:19:54,903 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 21:19:54,903 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 21:19:54,903 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 21:19:54,903 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 21:19:54,903 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 21:19:54,903 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 21:19:54,903 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 21:19:54,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 21:19:54,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 21:19:54,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 21:19:54,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 21:19:54,903 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 21:19:54,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 21:19:54,958 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 21:19:54,959 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 21:19:56,235 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 21:19:56,471 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 21:19:56,472 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 21:19:56,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:19:56 BoogieIcfgContainer [2023-03-31 21:19:56,479 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 21:19:56,481 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 21:19:56,481 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 21:19:56,483 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 21:19:56,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 09:19:54" (1/3) ... [2023-03-31 21:19:56,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56d74311 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:19:56, skipping insertion in model container [2023-03-31 21:19:56,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:19:54" (2/3) ... [2023-03-31 21:19:56,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56d74311 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:19:56, skipping insertion in model container [2023-03-31 21:19:56,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:19:56" (3/3) ... [2023-03-31 21:19:56,486 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label28.c [2023-03-31 21:19:56,497 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 21:19:56,497 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 21:19:56,539 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 21:19:56,544 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;@19db53a5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 21:19:56,544 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 21:19:56,549 INFO L276 IsEmpty]: Start isEmpty. Operand has 158 states, 150 states have (on average 1.9466666666666668) internal successors, (292), 151 states have internal predecessors, (292), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 21:19:56,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-03-31 21:19:56,561 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:19:56,562 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:19:56,563 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:19:56,567 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:19:56,567 INFO L85 PathProgramCache]: Analyzing trace with hash 597482627, now seen corresponding path program 1 times [2023-03-31 21:19:56,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:19:56,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228253603] [2023-03-31 21:19:56,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:19:56,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:19:56,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:19:57,388 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 21:19:57,388 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:19:57,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228253603] [2023-03-31 21:19:57,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228253603] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:19:57,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:19:57,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 21:19:57,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259911893] [2023-03-31 21:19:57,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:19:57,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 21:19:57,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:19:57,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 21:19:57,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 21:19:57,431 INFO L87 Difference]: Start difference. First operand has 158 states, 150 states have (on average 1.9466666666666668) internal successors, (292), 151 states have internal predecessors, (292), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 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 21:19:58,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:19:58,027 INFO L93 Difference]: Finished difference Result 462 states and 886 transitions. [2023-03-31 21:19:58,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 21:19:58,028 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 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 149 [2023-03-31 21:19:58,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:19:58,044 INFO L225 Difference]: With dead ends: 462 [2023-03-31 21:19:58,044 INFO L226 Difference]: Without dead ends: 301 [2023-03-31 21:19:58,047 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 21:19:58,050 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 55 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-31 21:19:58,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 36 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-31 21:19:58,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2023-03-31 21:19:58,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2023-03-31 21:19:58,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 293 states have (on average 1.89419795221843) internal successors, (555), 293 states have internal predecessors, (555), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-03-31 21:19:58,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 564 transitions. [2023-03-31 21:19:58,110 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 564 transitions. Word has length 149 [2023-03-31 21:19:58,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:19:58,111 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 564 transitions. [2023-03-31 21:19:58,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 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 21:19:58,111 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 564 transitions. [2023-03-31 21:19:58,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-03-31 21:19:58,114 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:19:58,114 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-31 21:19:58,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 21:19:58,114 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:19:58,115 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:19:58,115 INFO L85 PathProgramCache]: Analyzing trace with hash 15657277, now seen corresponding path program 1 times [2023-03-31 21:19:58,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:19:58,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836871191] [2023-03-31 21:19:58,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:19:58,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:19:58,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:19:58,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:19:58,447 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:19:58,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836871191] [2023-03-31 21:19:58,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836871191] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:19:58,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:19:58,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:19:58,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768204264] [2023-03-31 21:19:58,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:19:58,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:19:58,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:19:58,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:19:58,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:19:58,450 INFO L87 Difference]: Start difference. First operand 301 states and 564 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 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 21:19:58,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:19:58,772 INFO L93 Difference]: Finished difference Result 913 states and 1729 transitions. [2023-03-31 21:19:58,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 21:19:58,773 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 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 158 [2023-03-31 21:19:58,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:19:58,776 INFO L225 Difference]: With dead ends: 913 [2023-03-31 21:19:58,776 INFO L226 Difference]: Without dead ends: 617 [2023-03-31 21:19:58,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-03-31 21:19:58,778 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 773 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 773 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 21:19:58,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [773 Valid, 529 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 21:19:58,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2023-03-31 21:19:58,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 603. [2023-03-31 21:19:58,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 587 states have (on average 1.8824531516183987) internal successors, (1105), 591 states have internal predecessors, (1105), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (23), 5 states have call predecessors, (23), 5 states have call successors, (23) [2023-03-31 21:19:58,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 1134 transitions. [2023-03-31 21:19:58,795 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 1134 transitions. Word has length 158 [2023-03-31 21:19:58,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:19:58,795 INFO L495 AbstractCegarLoop]: Abstraction has 603 states and 1134 transitions. [2023-03-31 21:19:58,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 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 21:19:58,796 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 1134 transitions. [2023-03-31 21:19:58,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2023-03-31 21:19:58,798 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:19:58,799 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-31 21:19:58,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 21:19:58,799 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:19:58,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:19:58,799 INFO L85 PathProgramCache]: Analyzing trace with hash -848599966, now seen corresponding path program 1 times [2023-03-31 21:19:58,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:19:58,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942490944] [2023-03-31 21:19:58,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:19:58,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:19:58,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:19:59,098 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:19:59,099 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:19:59,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942490944] [2023-03-31 21:19:59,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942490944] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:19:59,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:19:59,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:19:59,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436597528] [2023-03-31 21:19:59,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:19:59,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:19:59,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:19:59,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:19:59,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:19:59,101 INFO L87 Difference]: Start difference. First operand 603 states and 1134 transitions. Second operand has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 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 21:19:59,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:19:59,838 INFO L93 Difference]: Finished difference Result 1861 states and 3585 transitions. [2023-03-31 21:19:59,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 21:19:59,839 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 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 161 [2023-03-31 21:19:59,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:19:59,843 INFO L225 Difference]: With dead ends: 1861 [2023-03-31 21:19:59,843 INFO L226 Difference]: Without dead ends: 1263 [2023-03-31 21:19:59,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-31 21:19:59,845 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 493 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 872 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-03-31 21:19:59,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 44 Invalid, 1127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 872 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-03-31 21:19:59,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1263 states. [2023-03-31 21:19:59,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1263 to 1231. [2023-03-31 21:19:59,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1231 states, 1187 states have (on average 1.818871103622578) internal successors, (2159), 1211 states have internal predecessors, (2159), 10 states have call successors, (10), 10 states have call predecessors, (10), 33 states have return successors, (115), 9 states have call predecessors, (115), 9 states have call successors, (115) [2023-03-31 21:19:59,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 2284 transitions. [2023-03-31 21:19:59,894 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 2284 transitions. Word has length 161 [2023-03-31 21:19:59,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:19:59,894 INFO L495 AbstractCegarLoop]: Abstraction has 1231 states and 2284 transitions. [2023-03-31 21:19:59,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 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 21:19:59,894 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 2284 transitions. [2023-03-31 21:19:59,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-03-31 21:19:59,897 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:19:59,897 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-31 21:19:59,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 21:19:59,898 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:19:59,898 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:19:59,898 INFO L85 PathProgramCache]: Analyzing trace with hash 973346421, now seen corresponding path program 1 times [2023-03-31 21:19:59,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:19:59,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410548398] [2023-03-31 21:19:59,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:19:59,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:19:59,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:20:00,251 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:20:00,251 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:20:00,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410548398] [2023-03-31 21:20:00,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410548398] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:20:00,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:20:00,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:20:00,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136404063] [2023-03-31 21:20:00,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:20:00,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:20:00,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:20:00,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:20:00,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:20:00,253 INFO L87 Difference]: Start difference. First operand 1231 states and 2284 transitions. Second operand has 5 states, 5 states have (on average 31.2) internal successors, (156), 4 states have internal predecessors, (156), 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 21:20:00,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:20:00,903 INFO L93 Difference]: Finished difference Result 3813 states and 7454 transitions. [2023-03-31 21:20:00,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 21:20:00,904 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.2) internal successors, (156), 4 states have internal predecessors, (156), 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 162 [2023-03-31 21:20:00,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:20:00,914 INFO L225 Difference]: With dead ends: 3813 [2023-03-31 21:20:00,914 INFO L226 Difference]: Without dead ends: 2587 [2023-03-31 21:20:00,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-31 21:20:00,917 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 506 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 1062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-03-31 21:20:00,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [506 Valid, 39 Invalid, 1062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-03-31 21:20:00,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2587 states. [2023-03-31 21:20:01,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2587 to 2551. [2023-03-31 21:20:01,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2551 states, 2419 states have (on average 1.5473336089293097) internal successors, (3743), 2515 states have internal predecessors, (3743), 18 states have call successors, (18), 18 states have call predecessors, (18), 113 states have return successors, (411), 17 states have call predecessors, (411), 17 states have call successors, (411) [2023-03-31 21:20:01,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2551 states to 2551 states and 4172 transitions. [2023-03-31 21:20:01,022 INFO L78 Accepts]: Start accepts. Automaton has 2551 states and 4172 transitions. Word has length 162 [2023-03-31 21:20:01,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:20:01,022 INFO L495 AbstractCegarLoop]: Abstraction has 2551 states and 4172 transitions. [2023-03-31 21:20:01,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.2) internal successors, (156), 4 states have internal predecessors, (156), 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 21:20:01,022 INFO L276 IsEmpty]: Start isEmpty. Operand 2551 states and 4172 transitions. [2023-03-31 21:20:01,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-03-31 21:20:01,027 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:20:01,027 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-31 21:20:01,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 21:20:01,027 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:20:01,028 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:20:01,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1089814590, now seen corresponding path program 1 times [2023-03-31 21:20:01,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:20:01,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142200663] [2023-03-31 21:20:01,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:20:01,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:20:01,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:20:01,675 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:20:01,675 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:20:01,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142200663] [2023-03-31 21:20:01,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142200663] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:20:01,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:20:01,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:20:01,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534588265] [2023-03-31 21:20:01,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:20:01,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:20:01,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:20:01,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:20:01,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:20:01,679 INFO L87 Difference]: Start difference. First operand 2551 states and 4172 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 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 21:20:02,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:20:02,475 INFO L93 Difference]: Finished difference Result 6149 states and 10089 transitions. [2023-03-31 21:20:02,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 21:20:02,475 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 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 163 [2023-03-31 21:20:02,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:20:02,489 INFO L225 Difference]: With dead ends: 6149 [2023-03-31 21:20:02,489 INFO L226 Difference]: Without dead ends: 3603 [2023-03-31 21:20:02,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-03-31 21:20:02,499 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 448 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 1203 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-03-31 21:20:02,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 55 Invalid, 1301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1203 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-03-31 21:20:02,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3603 states. [2023-03-31 21:20:02,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3603 to 3525. [2023-03-31 21:20:02,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3525 states, 3335 states have (on average 1.497151424287856) internal successors, (4993), 3477 states have internal predecessors, (4993), 24 states have call successors, (24), 24 states have call predecessors, (24), 165 states have return successors, (649), 23 states have call predecessors, (649), 23 states have call successors, (649) [2023-03-31 21:20:02,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3525 states to 3525 states and 5666 transitions. [2023-03-31 21:20:02,612 INFO L78 Accepts]: Start accepts. Automaton has 3525 states and 5666 transitions. Word has length 163 [2023-03-31 21:20:02,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:20:02,613 INFO L495 AbstractCegarLoop]: Abstraction has 3525 states and 5666 transitions. [2023-03-31 21:20:02,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 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 21:20:02,613 INFO L276 IsEmpty]: Start isEmpty. Operand 3525 states and 5666 transitions. [2023-03-31 21:20:02,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-03-31 21:20:02,621 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:20:02,621 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-31 21:20:02,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-03-31 21:20:02,622 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:20:02,622 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:20:02,622 INFO L85 PathProgramCache]: Analyzing trace with hash 153637093, now seen corresponding path program 1 times [2023-03-31 21:20:02,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:20:02,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804405891] [2023-03-31 21:20:02,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:20:02,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:20:02,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:20:02,871 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:20:02,871 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:20:02,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804405891] [2023-03-31 21:20:02,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804405891] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:20:02,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:20:02,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 21:20:02,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717009811] [2023-03-31 21:20:02,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:20:02,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 21:20:02,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:20:02,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 21:20:02,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 21:20:02,873 INFO L87 Difference]: Start difference. First operand 3525 states and 5666 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 21:20:03,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:20:03,474 INFO L93 Difference]: Finished difference Result 10115 states and 16968 transitions. [2023-03-31 21:20:03,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 21:20:03,475 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 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 170 [2023-03-31 21:20:03,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:20:03,508 INFO L225 Difference]: With dead ends: 10115 [2023-03-31 21:20:03,508 INFO L226 Difference]: Without dead ends: 6595 [2023-03-31 21:20:03,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 21:20:03,518 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 13 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-31 21:20:03,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 289 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-31 21:20:03,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6595 states. [2023-03-31 21:20:03,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6595 to 6595. [2023-03-31 21:20:03,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6595 states, 6300 states have (on average 1.4071428571428573) internal successors, (8865), 6507 states have internal predecessors, (8865), 44 states have call successors, (44), 44 states have call predecessors, (44), 250 states have return successors, (1420), 43 states have call predecessors, (1420), 43 states have call successors, (1420) [2023-03-31 21:20:03,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6595 states to 6595 states and 10329 transitions. [2023-03-31 21:20:03,660 INFO L78 Accepts]: Start accepts. Automaton has 6595 states and 10329 transitions. Word has length 170 [2023-03-31 21:20:03,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:20:03,661 INFO L495 AbstractCegarLoop]: Abstraction has 6595 states and 10329 transitions. [2023-03-31 21:20:03,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 21:20:03,661 INFO L276 IsEmpty]: Start isEmpty. Operand 6595 states and 10329 transitions. [2023-03-31 21:20:03,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-03-31 21:20:03,671 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:20:03,671 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2023-03-31 21:20:03,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-03-31 21:20:03,671 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:20:03,672 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:20:03,672 INFO L85 PathProgramCache]: Analyzing trace with hash -2001125100, now seen corresponding path program 1 times [2023-03-31 21:20:03,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:20:03,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097147643] [2023-03-31 21:20:03,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:20:03,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:20:03,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:20:04,243 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:20:04,243 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:20:04,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097147643] [2023-03-31 21:20:04,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097147643] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:20:04,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735565260] [2023-03-31 21:20:04,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:20:04,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:20:04,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:20:04,273 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 21:20:04,276 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 21:20:04,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:20:04,465 INFO L262 TraceCheckSpWp]: Trace formula consists of 1013 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-31 21:20:04,475 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:20:04,694 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-03-31 21:20:04,694 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 21:20:04,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735565260] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:20:04,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 21:20:04,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2023-03-31 21:20:04,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846805772] [2023-03-31 21:20:04,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:20:04,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 21:20:04,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:20:04,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 21:20:04,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-03-31 21:20:04,696 INFO L87 Difference]: Start difference. First operand 6595 states and 10329 transitions. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 21:20:05,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:20:05,348 INFO L93 Difference]: Finished difference Result 19205 states and 30873 transitions. [2023-03-31 21:20:05,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 21:20:05,349 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 174 [2023-03-31 21:20:05,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:20:05,417 INFO L225 Difference]: With dead ends: 19205 [2023-03-31 21:20:05,417 INFO L226 Difference]: Without dead ends: 12615 [2023-03-31 21:20:05,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-03-31 21:20:05,437 INFO L413 NwaCegarLoop]: 299 mSDtfsCounter, 5 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-31 21:20:05,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 324 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-31 21:20:05,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12615 states. [2023-03-31 21:20:05,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12615 to 12613. [2023-03-31 21:20:05,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12613 states, 12169 states have (on average 1.3812145615909277) internal successors, (16808), 12445 states have internal predecessors, (16808), 84 states have call successors, (84), 84 states have call predecessors, (84), 359 states have return successors, (3111), 83 states have call predecessors, (3111), 83 states have call successors, (3111) [2023-03-31 21:20:05,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12613 states to 12613 states and 20003 transitions. [2023-03-31 21:20:05,777 INFO L78 Accepts]: Start accepts. Automaton has 12613 states and 20003 transitions. Word has length 174 [2023-03-31 21:20:05,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:20:05,778 INFO L495 AbstractCegarLoop]: Abstraction has 12613 states and 20003 transitions. [2023-03-31 21:20:05,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 21:20:05,779 INFO L276 IsEmpty]: Start isEmpty. Operand 12613 states and 20003 transitions. [2023-03-31 21:20:05,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2023-03-31 21:20:05,803 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:20:05,803 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-03-31 21:20:05,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 21:20:06,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:20:06,010 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:20:06,010 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:20:06,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1834319755, now seen corresponding path program 1 times [2023-03-31 21:20:06,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:20:06,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199546285] [2023-03-31 21:20:06,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:20:06,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:20:06,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:20:06,407 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-03-31 21:20:06,407 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:20:06,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199546285] [2023-03-31 21:20:06,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199546285] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:20:06,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111479654] [2023-03-31 21:20:06,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:20:06,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:20:06,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:20:06,408 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 21:20:06,425 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 21:20:06,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:20:06,626 INFO L262 TraceCheckSpWp]: Trace formula consists of 1037 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 21:20:06,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:20:06,793 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-03-31 21:20:06,793 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 21:20:06,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111479654] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:20:06,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 21:20:06,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-03-31 21:20:06,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3323647] [2023-03-31 21:20:06,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:20:06,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 21:20:06,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:20:06,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 21:20:06,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-03-31 21:20:06,795 INFO L87 Difference]: Start difference. First operand 12613 states and 20003 transitions. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 21:20:07,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:20:07,566 INFO L93 Difference]: Finished difference Result 28483 states and 45518 transitions. [2023-03-31 21:20:07,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 21:20:07,567 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 187 [2023-03-31 21:20:07,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:20:07,647 INFO L225 Difference]: With dead ends: 28483 [2023-03-31 21:20:07,647 INFO L226 Difference]: Without dead ends: 15875 [2023-03-31 21:20:07,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-03-31 21:20:07,743 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 9 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-03-31 21:20:07,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 282 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-03-31 21:20:07,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15875 states. [2023-03-31 21:20:08,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15875 to 15875. [2023-03-31 21:20:08,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15875 states, 15373 states have (on average 1.3812528458986535) internal successors, (21234), 15663 states have internal predecessors, (21234), 106 states have call successors, (106), 106 states have call predecessors, (106), 395 states have return successors, (3920), 105 states have call predecessors, (3920), 105 states have call successors, (3920) [2023-03-31 21:20:08,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15875 states to 15875 states and 25260 transitions. [2023-03-31 21:20:08,078 INFO L78 Accepts]: Start accepts. Automaton has 15875 states and 25260 transitions. Word has length 187 [2023-03-31 21:20:08,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:20:08,078 INFO L495 AbstractCegarLoop]: Abstraction has 15875 states and 25260 transitions. [2023-03-31 21:20:08,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 21:20:08,079 INFO L276 IsEmpty]: Start isEmpty. Operand 15875 states and 25260 transitions. [2023-03-31 21:20:08,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2023-03-31 21:20:08,114 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:20:08,114 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:20:08,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 21:20:08,324 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,SelfDestructingSolverStorable7 [2023-03-31 21:20:08,324 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:20:08,325 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:20:08,325 INFO L85 PathProgramCache]: Analyzing trace with hash -885183223, now seen corresponding path program 1 times [2023-03-31 21:20:08,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:20:08,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506549454] [2023-03-31 21:20:08,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:20:08,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:20:08,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:20:08,933 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 72 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:20:08,934 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:20:08,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506549454] [2023-03-31 21:20:08,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506549454] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:20:08,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689427520] [2023-03-31 21:20:08,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:20:08,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:20:08,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:20:08,935 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 21:20:08,960 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 21:20:09,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:20:09,139 INFO L262 TraceCheckSpWp]: Trace formula consists of 1052 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-31 21:20:09,143 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:20:09,206 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 72 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:20:09,206 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:20:09,324 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 72 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:20:09,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689427520] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:20:09,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1919608304] [2023-03-31 21:20:09,341 INFO L159 IcfgInterpreter]: Started Sifa with 153 locations of interest [2023-03-31 21:20:09,341 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:20:09,343 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:20:09,346 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:20:09,347 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:20:09,840 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 162 for LOIs [2023-03-31 21:20:12,115 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 150 for LOIs [2023-03-31 21:20:59,361 WARN L223 SmtUtils]: Spent 32.65s on a formula simplification that was a NOOP. DAG size: 961 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)