/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/eca-rers2012/Problem16_label26.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:18:22,316 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:18:22,318 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:18:22,342 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:18:22,342 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:18:22,343 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:18:22,348 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:18:22,352 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:18:22,356 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:18:22,360 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:18:22,361 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:18:22,362 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:18:22,362 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:18:22,363 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:18:22,363 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:18:22,364 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:18:22,365 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:18:22,365 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:18:22,366 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:18:22,368 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:18:22,369 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:18:22,370 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:18:22,371 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:18:22,371 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:18:22,374 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:18:22,374 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:18:22,374 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:18:22,375 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:18:22,375 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:18:22,376 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:18:22,376 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:18:22,377 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:18:22,377 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:18:22,378 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:18:22,379 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:18:22,379 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:18:22,380 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:18:22,380 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:18:22,380 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:18:22,381 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:18:22,381 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:18:22,383 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 04:18:22,402 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:18:22,402 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:18:22,403 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:18:22,403 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:18:22,403 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:18:22,404 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:18:22,404 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:18:22,404 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:18:22,404 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:18:22,404 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:18:22,405 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:18:22,405 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:18:22,405 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:18:22,405 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:18:22,405 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:18:22,406 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:18:22,406 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:18:22,406 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:18:22,406 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:18:22,407 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:18:22,407 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:18:22,407 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:18:22,407 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:18:22,407 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:18:22,408 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:18:22,408 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:18:22,408 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:18:22,408 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:18:22,408 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:18:22,409 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:18:22,409 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:18:22,409 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:18:22,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:18:22,410 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:18:22,410 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:18:22,410 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:18:22,410 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:18:22,410 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:18:22,411 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:18:22,411 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:18:22,411 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:18:22,411 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:18:22,597 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:18:22,615 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:18:22,618 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:18:22,619 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:18:22,620 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:18:22,621 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem16_label26.c [2023-04-01 04:18:23,858 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:18:24,233 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:18:24,234 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label26.c [2023-04-01 04:18:24,250 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9af88d666/8e4e5c184d9a429bbe3066202e7927d2/FLAGa2c067761 [2023-04-01 04:18:24,263 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9af88d666/8e4e5c184d9a429bbe3066202e7927d2 [2023-04-01 04:18:24,266 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:18:24,267 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:18:24,268 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:18:24,269 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:18:24,272 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:18:24,272 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:18:24" (1/1) ... [2023-04-01 04:18:24,273 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40e4d916 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:18:24, skipping insertion in model container [2023-04-01 04:18:24,274 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:18:24" (1/1) ... [2023-04-01 04:18:24,280 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:18:24,342 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:18:24,581 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label26.c[3798,3811] [2023-04-01 04:18:24,989 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:18:25,004 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:18:25,039 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/Problem16_label26.c[3798,3811] [2023-04-01 04:18:25,193 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:18:25,210 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:18:25,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:18:25 WrapperNode [2023-04-01 04:18:25,210 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:18:25,212 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:18:25,212 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:18:25,212 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:18:25,222 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:18:25" (1/1) ... [2023-04-01 04:18:25,223 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:18:25" (1/1) ... [2023-04-01 04:18:25,264 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:18:25" (1/1) ... [2023-04-01 04:18:25,265 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:18:25" (1/1) ... [2023-04-01 04:18:25,310 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:18:25" (1/1) ... [2023-04-01 04:18:25,323 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:18:25" (1/1) ... [2023-04-01 04:18:25,334 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:18:25" (1/1) ... [2023-04-01 04:18:25,347 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:18:25" (1/1) ... [2023-04-01 04:18:25,357 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:18:25,358 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:18:25,358 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:18:25,358 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:18:25,359 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:18:25" (1/1) ... [2023-04-01 04:18:25,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:18:25,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:18:25,385 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 04:18:25,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 04:18:25,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:18:25,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:18:25,427 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:18:25,428 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:18:25,428 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:18:25,428 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:18:25,428 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:18:25,428 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:18:25,429 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:18:25,429 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:18:25,429 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:18:25,429 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:18:25,429 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:18:25,429 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:18:25,429 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:18:25,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:18:25,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:18:25,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:18:25,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:18:25,429 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:18:25,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:18:25,524 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:18:25,527 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:18:27,627 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:18:28,761 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:18:28,762 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:18:28,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:18:28 BoogieIcfgContainer [2023-04-01 04:18:28,764 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:18:28,766 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:18:28,767 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:18:28,769 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:18:28,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:18:24" (1/3) ... [2023-04-01 04:18:28,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dcd0a31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:18:28, skipping insertion in model container [2023-04-01 04:18:28,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:18:25" (2/3) ... [2023-04-01 04:18:28,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dcd0a31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:18:28, skipping insertion in model container [2023-04-01 04:18:28,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:18:28" (3/3) ... [2023-04-01 04:18:28,772 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label26.c [2023-04-01 04:18:28,787 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:18:28,787 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:18:28,833 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:18:28,840 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;@d5e4821, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:18:28,840 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:18:28,848 INFO L276 IsEmpty]: Start isEmpty. Operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 04:18:28,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:18:28,854 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:18:28,855 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:18:28,856 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:18:28,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:18:28,862 INFO L85 PathProgramCache]: Analyzing trace with hash -706736026, now seen corresponding path program 1 times [2023-04-01 04:18:28,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:18:28,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741043467] [2023-04-01 04:18:28,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:18:28,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:18:29,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:18:29,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:18:29,241 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:18:29,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741043467] [2023-04-01 04:18:29,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741043467] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:18:29,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:18:29,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:18:29,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985310186] [2023-04-01 04:18:29,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:18:29,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:18:29,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:18:29,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:18:29,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:18:29,290 INFO L87 Difference]: Start difference. First operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:18:30,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:18:30,957 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2023-04-01 04:18:30,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:18:30,959 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 04:18:30,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:18:30,973 INFO L225 Difference]: With dead ends: 718 [2023-04-01 04:18:30,973 INFO L226 Difference]: Without dead ends: 471 [2023-04-01 04:18:30,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:18:30,982 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 247 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-04-01 04:18:30,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 90 Invalid, 1003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-04-01 04:18:30,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-04-01 04:18:31,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 468. [2023-04-01 04:18:31,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 458 states have (on average 1.8384279475982532) internal successors, (842), 458 states have internal predecessors, (842), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-01 04:18:31,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 853 transitions. [2023-04-01 04:18:31,067 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 853 transitions. Word has length 11 [2023-04-01 04:18:31,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:18:31,067 INFO L495 AbstractCegarLoop]: Abstraction has 468 states and 853 transitions. [2023-04-01 04:18:31,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:18:31,068 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 853 transitions. [2023-04-01 04:18:31,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-01 04:18:31,069 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:18:31,069 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:18:31,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:18:31,070 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:18:31,070 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:18:31,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1940827752, now seen corresponding path program 1 times [2023-04-01 04:18:31,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:18:31,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30353408] [2023-04-01 04:18:31,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:18:31,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:18:31,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:18:31,364 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:18:31,364 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:18:31,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30353408] [2023-04-01 04:18:31,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30353408] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:18:31,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:18:31,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:18:31,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165139737] [2023-04-01 04:18:31,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:18:31,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:18:31,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:18:31,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:18:31,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:18:31,368 INFO L87 Difference]: Start difference. First operand 468 states and 853 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:18:32,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:18:32,775 INFO L93 Difference]: Finished difference Result 1410 states and 2605 transitions. [2023-04-01 04:18:32,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:18:32,776 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 22 [2023-04-01 04:18:32,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:18:32,784 INFO L225 Difference]: With dead ends: 1410 [2023-04-01 04:18:32,784 INFO L226 Difference]: Without dead ends: 947 [2023-04-01 04:18:32,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:18:32,787 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 889 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1247 mSolverCounterSat, 397 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 889 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 397 IncrementalHoareTripleChecker+Valid, 1247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-01 04:18:32,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [889 Valid, 43 Invalid, 1644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [397 Valid, 1247 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-01 04:18:32,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2023-04-01 04:18:32,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 924. [2023-04-01 04:18:32,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 924 states, 906 states have (on average 1.7339955849889626) internal successors, (1571), 910 states have internal predecessors, (1571), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) [2023-04-01 04:18:32,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 1604 transitions. [2023-04-01 04:18:32,837 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 1604 transitions. Word has length 22 [2023-04-01 04:18:32,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:18:32,837 INFO L495 AbstractCegarLoop]: Abstraction has 924 states and 1604 transitions. [2023-04-01 04:18:32,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:18:32,838 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 1604 transitions. [2023-04-01 04:18:32,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 04:18:32,838 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:18:32,839 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:18:32,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:18:32,839 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:18:32,839 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:18:32,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1197799739, now seen corresponding path program 1 times [2023-04-01 04:18:32,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:18:32,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496054156] [2023-04-01 04:18:32,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:18:32,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:18:32,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:18:33,001 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:18:33,001 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:18:33,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496054156] [2023-04-01 04:18:33,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496054156] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:18:33,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:18:33,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:18:33,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113137608] [2023-04-01 04:18:33,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:18:33,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:18:33,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:18:33,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:18:33,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:18:33,007 INFO L87 Difference]: Start difference. First operand 924 states and 1604 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:18:34,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:18:34,441 INFO L93 Difference]: Finished difference Result 2556 states and 4514 transitions. [2023-04-01 04:18:34,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:18:34,443 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2023-04-01 04:18:34,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:18:34,454 INFO L225 Difference]: With dead ends: 2556 [2023-04-01 04:18:34,454 INFO L226 Difference]: Without dead ends: 1637 [2023-04-01 04:18:34,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:18:34,462 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 994 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 994 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 439 IncrementalHoareTripleChecker+Valid, 1145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-01 04:18:34,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [994 Valid, 45 Invalid, 1584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [439 Valid, 1145 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-01 04:18:34,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2023-04-01 04:18:34,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1605. [2023-04-01 04:18:34,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1605 states, 1573 states have (on average 1.477431659249841) internal successors, (2324), 1583 states have internal predecessors, (2324), 11 states have call successors, (11), 11 states have call predecessors, (11), 20 states have return successors, (69), 10 states have call predecessors, (69), 10 states have call successors, (69) [2023-04-01 04:18:34,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1605 states to 1605 states and 2404 transitions. [2023-04-01 04:18:34,526 INFO L78 Accepts]: Start accepts. Automaton has 1605 states and 2404 transitions. Word has length 23 [2023-04-01 04:18:34,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:18:34,527 INFO L495 AbstractCegarLoop]: Abstraction has 1605 states and 2404 transitions. [2023-04-01 04:18:34,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:18:34,527 INFO L276 IsEmpty]: Start isEmpty. Operand 1605 states and 2404 transitions. [2023-04-01 04:18:34,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-04-01 04:18:34,531 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:18:34,532 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 04:18:34,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:18:34,532 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:18:34,533 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:18:34,533 INFO L85 PathProgramCache]: Analyzing trace with hash -88801929, now seen corresponding path program 1 times [2023-04-01 04:18:34,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:18:34,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986775490] [2023-04-01 04:18:34,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:18:34,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:18:34,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:18:34,799 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 04:18:34,799 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:18:34,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986775490] [2023-04-01 04:18:34,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986775490] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:18:34,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:18:34,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:18:34,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309030299] [2023-04-01 04:18:34,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:18:34,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:18:34,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:18:34,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:18:34,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:18:34,803 INFO L87 Difference]: Start difference. First operand 1605 states and 2404 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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) [2023-04-01 04:18:35,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:18:35,927 INFO L93 Difference]: Finished difference Result 4561 states and 6803 transitions. [2023-04-01 04:18:35,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:18:35,932 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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 92 [2023-04-01 04:18:35,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:18:35,948 INFO L225 Difference]: With dead ends: 4561 [2023-04-01 04:18:35,948 INFO L226 Difference]: Without dead ends: 2961 [2023-04-01 04:18:35,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:18:35,962 INFO L413 NwaCegarLoop]: 460 mSDtfsCounter, 225 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:18:35,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 476 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-01 04:18:35,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2961 states. [2023-04-01 04:18:36,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2961 to 2913. [2023-04-01 04:18:36,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2913 states, 2866 states have (on average 1.3080949057920446) internal successors, (3749), 2879 states have internal predecessors, (3749), 17 states have call successors, (17), 17 states have call predecessors, (17), 29 states have return successors, (145), 16 states have call predecessors, (145), 16 states have call successors, (145) [2023-04-01 04:18:36,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2913 states to 2913 states and 3911 transitions. [2023-04-01 04:18:36,059 INFO L78 Accepts]: Start accepts. Automaton has 2913 states and 3911 transitions. Word has length 92 [2023-04-01 04:18:36,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:18:36,062 INFO L495 AbstractCegarLoop]: Abstraction has 2913 states and 3911 transitions. [2023-04-01 04:18:36,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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) [2023-04-01 04:18:36,062 INFO L276 IsEmpty]: Start isEmpty. Operand 2913 states and 3911 transitions. [2023-04-01 04:18:36,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-04-01 04:18:36,072 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:18:36,072 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:18:36,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 04:18:36,073 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:18:36,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:18:36,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1181972669, now seen corresponding path program 1 times [2023-04-01 04:18:36,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:18:36,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420049838] [2023-04-01 04:18:36,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:18:36,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:18:36,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:18:36,377 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:18:36,377 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:18:36,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420049838] [2023-04-01 04:18:36,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420049838] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:18:36,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:18:36,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:18:36,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755501346] [2023-04-01 04:18:36,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:18:36,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:18:36,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:18:36,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:18:36,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:18:36,380 INFO L87 Difference]: Start difference. First operand 2913 states and 3911 transitions. Second operand has 5 states, 5 states have (on average 21.8) internal successors, (109), 4 states have internal predecessors, (109), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:18:37,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:18:37,919 INFO L93 Difference]: Finished difference Result 7225 states and 10000 transitions. [2023-04-01 04:18:37,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:18:37,920 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 4 states have internal predecessors, (109), 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 115 [2023-04-01 04:18:37,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:18:37,939 INFO L225 Difference]: With dead ends: 7225 [2023-04-01 04:18:37,940 INFO L226 Difference]: Without dead ends: 4317 [2023-04-01 04:18:37,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:18:37,946 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 608 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1326 mSolverCounterSat, 402 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 402 IncrementalHoareTripleChecker+Valid, 1326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-01 04:18:37,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [608 Valid, 44 Invalid, 1728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [402 Valid, 1326 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-01 04:18:37,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4317 states. [2023-04-01 04:18:38,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4317 to 4138. [2023-04-01 04:18:38,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4138 states, 4059 states have (on average 1.3128849470312884) internal successors, (5329), 4092 states have internal predecessors, (5329), 23 states have call successors, (23), 23 states have call predecessors, (23), 55 states have return successors, (363), 22 states have call predecessors, (363), 22 states have call successors, (363) [2023-04-01 04:18:38,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4138 states to 4138 states and 5715 transitions. [2023-04-01 04:18:38,062 INFO L78 Accepts]: Start accepts. Automaton has 4138 states and 5715 transitions. Word has length 115 [2023-04-01 04:18:38,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:18:38,064 INFO L495 AbstractCegarLoop]: Abstraction has 4138 states and 5715 transitions. [2023-04-01 04:18:38,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 4 states have internal predecessors, (109), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:18:38,065 INFO L276 IsEmpty]: Start isEmpty. Operand 4138 states and 5715 transitions. [2023-04-01 04:18:38,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-04-01 04:18:38,071 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:18:38,071 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:18:38,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 04:18:38,071 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:18:38,072 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:18:38,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1546443941, now seen corresponding path program 1 times [2023-04-01 04:18:38,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:18:38,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464843484] [2023-04-01 04:18:38,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:18:38,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:18:38,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:18:38,348 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:18:38,349 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:18:38,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464843484] [2023-04-01 04:18:38,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464843484] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:18:38,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:18:38,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:18:38,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557328238] [2023-04-01 04:18:38,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:18:38,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:18:38,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:18:38,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:18:38,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:18:38,352 INFO L87 Difference]: Start difference. First operand 4138 states and 5715 transitions. Second operand has 5 states, 5 states have (on average 25.8) internal successors, (129), 4 states have internal predecessors, (129), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:18:39,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:18:39,766 INFO L93 Difference]: Finished difference Result 9662 states and 13586 transitions. [2023-04-01 04:18:39,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:18:39,768 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 4 states have internal predecessors, (129), 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 135 [2023-04-01 04:18:39,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:18:39,793 INFO L225 Difference]: With dead ends: 9662 [2023-04-01 04:18:39,793 INFO L226 Difference]: Without dead ends: 5529 [2023-04-01 04:18:39,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:18:39,803 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 568 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1293 mSolverCounterSat, 424 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 424 IncrementalHoareTripleChecker+Valid, 1293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-01 04:18:39,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [568 Valid, 44 Invalid, 1717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [424 Valid, 1293 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-01 04:18:39,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5529 states. [2023-04-01 04:18:39,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5529 to 5487. [2023-04-01 04:18:39,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5487 states, 5381 states have (on average 1.2965991451403085) internal successors, (6977), 5429 states have internal predecessors, (6977), 29 states have call successors, (29), 29 states have call predecessors, (29), 76 states have return successors, (528), 28 states have call predecessors, (528), 28 states have call successors, (528) [2023-04-01 04:18:39,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5487 states to 5487 states and 7534 transitions. [2023-04-01 04:18:39,947 INFO L78 Accepts]: Start accepts. Automaton has 5487 states and 7534 transitions. Word has length 135 [2023-04-01 04:18:39,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:18:39,948 INFO L495 AbstractCegarLoop]: Abstraction has 5487 states and 7534 transitions. [2023-04-01 04:18:39,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 4 states have internal predecessors, (129), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:18:39,949 INFO L276 IsEmpty]: Start isEmpty. Operand 5487 states and 7534 transitions. [2023-04-01 04:18:39,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-04-01 04:18:39,951 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:18:39,951 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 04:18:39,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 04:18:39,951 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:18:39,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:18:39,952 INFO L85 PathProgramCache]: Analyzing trace with hash 274432705, now seen corresponding path program 1 times [2023-04-01 04:18:39,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:18:39,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412416858] [2023-04-01 04:18:39,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:18:39,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:18:39,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:18:40,218 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 82 proven. 23 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-04-01 04:18:40,219 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:18:40,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412416858] [2023-04-01 04:18:40,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412416858] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:18:40,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773836846] [2023-04-01 04:18:40,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:18:40,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:18:40,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:18:40,225 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:18:40,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 04:18:40,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:18:40,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 713 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:18:40,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:18:40,539 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 112 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-01 04:18:40,539 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:18:40,871 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 82 proven. 23 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-04-01 04:18:40,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773836846] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:18:40,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [414110915] [2023-04-01 04:18:40,891 INFO L159 IcfgInterpreter]: Started Sifa with 77 locations of interest [2023-04-01 04:18:40,891 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:18:40,894 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:18:40,898 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:18:40,899 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:18:41,065 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 46 for LOIs [2023-04-01 04:18:41,222 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 29 [2023-04-01 04:18:46,065 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 86018 conjuctions. This might take some time... [2023-04-01 04:18:57,636 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 1470 conjuctions. [2023-04-01 04:19:19,077 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 32