/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/Problem16_label47.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:18:43,128 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:18:43,129 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:18:43,163 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:18:43,164 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:18:43,165 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:18:43,168 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:18:43,169 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:18:43,170 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:18:43,174 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:18:43,175 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:18:43,176 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:18:43,177 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:18:43,178 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:18:43,179 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:18:43,180 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:18:43,180 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:18:43,181 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:18:43,183 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:18:43,186 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:18:43,187 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:18:43,188 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:18:43,188 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:18:43,189 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:18:43,195 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-31 22:18:43,198 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:18:43,198 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:18:43,199 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:18:43,199 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:18:43,200 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:18:43,200 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:18:43,200 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:18:43,201 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:18:43,201 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:18:43,201 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:18:43,202 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:18:43,203 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-03-31 22:18:43,225 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:18:43,225 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:18:43,225 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:18:43,225 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:18:43,226 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:18:43,226 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:18:43,226 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:18:43,226 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:18:43,226 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:18:43,226 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:18:43,227 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:18:43,227 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:18:43,227 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:18:43,227 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:18:43,227 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:18:43,227 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:18:43,227 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:18:43,227 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:18:43,228 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:18:43,228 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:18:43,228 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:18:43,228 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:18:43,228 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:18:43,228 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:18:43,228 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:18:43,229 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:18:43,229 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:18:43,229 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:18:43,229 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:18:43,229 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:18:43,229 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:18:43,229 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:18:43,229 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:18:43,230 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:18:43,230 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:18:43,230 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:18:43,230 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:18:43,230 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:18:43,230 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:18:43,230 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:18:43,230 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:18:43,230 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:18:43,392 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:18:43,417 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:18:43,419 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:18:43,419 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:18:43,420 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:18:43,421 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem16_label47.c [2023-03-31 22:18:44,497 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:18:44,767 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:18:44,768 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label47.c [2023-03-31 22:18:44,778 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7811a8b7a/0434588538564d89b5e1eb8cd5a1c958/FLAGd079c719f [2023-03-31 22:18:44,787 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7811a8b7a/0434588538564d89b5e1eb8cd5a1c958 [2023-03-31 22:18:44,789 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:18:44,790 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:18:44,791 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:18:44,791 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:18:44,793 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:18:44,793 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:18:44" (1/1) ... [2023-03-31 22:18:44,794 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70126f0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:18:44, skipping insertion in model container [2023-03-31 22:18:44,794 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:18:44" (1/1) ... [2023-03-31 22:18:44,798 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:18:44,829 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:18:44,955 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_label47.c[6782,6795] [2023-03-31 22:18:45,167 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:18:45,174 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:18:45,190 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_label47.c[6782,6795] [2023-03-31 22:18:45,428 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:18:45,439 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:18:45,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:18:45 WrapperNode [2023-03-31 22:18:45,440 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:18:45,440 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:18:45,441 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:18:45,441 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:18:45,456 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:18:45" (1/1) ... [2023-03-31 22:18:45,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:18:45" (1/1) ... [2023-03-31 22:18:45,490 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:18:45" (1/1) ... [2023-03-31 22:18:45,490 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:18:45" (1/1) ... [2023-03-31 22:18:45,529 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:18:45" (1/1) ... [2023-03-31 22:18:45,536 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:18:45" (1/1) ... [2023-03-31 22:18:45,550 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:18:45" (1/1) ... [2023-03-31 22:18:45,558 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:18:45" (1/1) ... [2023-03-31 22:18:45,563 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:18:45,564 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:18:45,564 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:18:45,564 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:18:45,565 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:18:45" (1/1) ... [2023-03-31 22:18:45,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:18:45,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:18:45,604 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-31 22:18:45,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-31 22:18:45,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:18:45,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:18:45,648 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:18:45,649 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 22:18:45,649 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 22:18:45,649 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:18:45,649 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 22:18:45,649 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 22:18:45,650 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:18:45,650 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:18:45,650 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:18:45,650 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:18:45,650 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:18:45,650 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:18:45,650 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:18:45,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:18:45,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:18:45,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:18:45,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:18:45,650 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:18:45,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:18:45,721 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:18:45,722 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:18:47,145 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:18:47,939 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:18:47,940 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 22:18:47,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:18:47 BoogieIcfgContainer [2023-03-31 22:18:47,942 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:18:47,944 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:18:47,944 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:18:47,946 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:18:47,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:18:44" (1/3) ... [2023-03-31 22:18:47,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76ad754b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:18:47, skipping insertion in model container [2023-03-31 22:18:47,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:18:45" (2/3) ... [2023-03-31 22:18:47,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76ad754b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:18:47, skipping insertion in model container [2023-03-31 22:18:47,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:18:47" (3/3) ... [2023-03-31 22:18:47,948 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label47.c [2023-03-31 22:18:47,959 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:18:47,960 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:18:48,064 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:18:48,068 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;@7494e39b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:18:48,069 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:18:48,074 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) [2023-03-31 22:18:48,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 22:18:48,078 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:18:48,078 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:18:48,079 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:18:48,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:18:48,084 INFO L85 PathProgramCache]: Analyzing trace with hash -706725463, now seen corresponding path program 1 times [2023-03-31 22:18:48,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:18:48,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457482834] [2023-03-31 22:18:48,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:18:48,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:18:48,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:18:48,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:18:48,411 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:18:48,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457482834] [2023-03-31 22:18:48,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457482834] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:18:48,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:18:48,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:18:48,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225943890] [2023-03-31 22:18:48,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:18:48,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:18:48,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:18:48,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:18:48,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:18:48,435 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) [2023-03-31 22:18:49,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:18:49,430 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2023-03-31 22:18:49,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:18:49,432 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-03-31 22:18:49,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:18:49,443 INFO L225 Difference]: With dead ends: 718 [2023-03-31 22:18:49,443 INFO L226 Difference]: Without dead ends: 471 [2023-03-31 22:18:49,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:18:49,450 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 307 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 348 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 348 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-03-31 22:18:49,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 54 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [348 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-03-31 22:18:49,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-03-31 22:18:49,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 462. [2023-03-31 22:18:49,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 452 states have (on average 1.915929203539823) internal successors, (866), 452 states have internal predecessors, (866), 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) [2023-03-31 22:18:49,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 877 transitions. [2023-03-31 22:18:49,528 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 877 transitions. Word has length 11 [2023-03-31 22:18:49,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:18:49,529 INFO L495 AbstractCegarLoop]: Abstraction has 462 states and 877 transitions. [2023-03-31 22:18:49,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:18:49,529 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 877 transitions. [2023-03-31 22:18:49,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-03-31 22:18:49,530 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:18:49,531 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] [2023-03-31 22:18:49,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:18:49,531 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:18:49,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:18:49,532 INFO L85 PathProgramCache]: Analyzing trace with hash -973631004, now seen corresponding path program 1 times [2023-03-31 22:18:49,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:18:49,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352217970] [2023-03-31 22:18:49,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:18:49,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:18:49,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:18:49,670 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:18:49,671 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:18:49,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352217970] [2023-03-31 22:18:49,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352217970] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:18:49,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:18:49,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:18:49,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118566647] [2023-03-31 22:18:49,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:18:49,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:18:49,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:18:49,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:18:49,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:18:49,673 INFO L87 Difference]: Start difference. First operand 462 states and 877 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:18:50,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:18:50,916 INFO L93 Difference]: Finished difference Result 1390 states and 2669 transitions. [2023-03-31 22:18:50,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:18:50,916 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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 44 [2023-03-31 22:18:50,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:18:50,922 INFO L225 Difference]: With dead ends: 1390 [2023-03-31 22:18:50,922 INFO L226 Difference]: Without dead ends: 933 [2023-03-31 22:18:50,924 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 22:18:50,925 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 853 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1251 mSolverCounterSat, 403 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 853 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 403 IncrementalHoareTripleChecker+Valid, 1251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-03-31 22:18:50,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [853 Valid, 43 Invalid, 1654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [403 Valid, 1251 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-03-31 22:18:50,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2023-03-31 22:18:50,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 917. [2023-03-31 22:18:50,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 900 states have (on average 1.8311111111111111) internal successors, (1648), 903 states have internal predecessors, (1648), 7 states have call successors, (7), 7 states have call predecessors, (7), 9 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2023-03-31 22:18:50,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 1678 transitions. [2023-03-31 22:18:50,959 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 1678 transitions. Word has length 44 [2023-03-31 22:18:50,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:18:50,959 INFO L495 AbstractCegarLoop]: Abstraction has 917 states and 1678 transitions. [2023-03-31 22:18:50,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:18:50,959 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 1678 transitions. [2023-03-31 22:18:50,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-03-31 22:18:50,961 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:18:50,961 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-03-31 22:18:50,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 22:18:50,962 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:18:50,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:18:50,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1181573133, now seen corresponding path program 1 times [2023-03-31 22:18:50,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:18:50,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057803026] [2023-03-31 22:18:50,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:18:50,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:18:50,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:18:51,137 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 22:18:51,138 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:18:51,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057803026] [2023-03-31 22:18:51,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057803026] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:18:51,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957005456] [2023-03-31 22:18:51,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:18:51,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:18:51,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:18:51,141 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:18:51,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 22:18:51,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:18:51,235 INFO L262 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 22:18:51,239 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:18:51,333 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 22:18:51,333 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 22:18:51,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957005456] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:18:51,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 22:18:51,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-03-31 22:18:51,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484066437] [2023-03-31 22:18:51,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:18:51,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:18:51,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:18:51,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:18:51,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:18:51,335 INFO L87 Difference]: Start difference. First operand 917 states and 1678 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 22:18:52,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:18:52,458 INFO L93 Difference]: Finished difference Result 2749 states and 5075 transitions. [2023-03-31 22:18:52,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 22:18:52,459 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 95 [2023-03-31 22:18:52,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:18:52,466 INFO L225 Difference]: With dead ends: 2749 [2023-03-31 22:18:52,466 INFO L226 Difference]: Without dead ends: 1837 [2023-03-31 22:18:52,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-03-31 22:18:52,469 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 887 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 440 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 887 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 440 IncrementalHoareTripleChecker+Valid, 1145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-03-31 22:18:52,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [887 Valid, 37 Invalid, 1585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [440 Valid, 1145 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-03-31 22:18:52,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1837 states. [2023-03-31 22:18:52,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1837 to 1168. [2023-03-31 22:18:52,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1140 states have (on average 1.7456140350877194) internal successors, (1990), 1148 states have internal predecessors, (1990), 10 states have call successors, (10), 10 states have call predecessors, (10), 17 states have return successors, (48), 9 states have call predecessors, (48), 9 states have call successors, (48) [2023-03-31 22:18:52,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 2048 transitions. [2023-03-31 22:18:52,537 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 2048 transitions. Word has length 95 [2023-03-31 22:18:52,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:18:52,553 INFO L495 AbstractCegarLoop]: Abstraction has 1168 states and 2048 transitions. [2023-03-31 22:18:52,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 22:18:52,553 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 2048 transitions. [2023-03-31 22:18:52,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-03-31 22:18:52,560 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:18:52,560 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-03-31 22:18:52,569 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 22:18:52,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:18:52,761 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:18:52,762 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:18:52,762 INFO L85 PathProgramCache]: Analyzing trace with hash 2003195669, now seen corresponding path program 1 times [2023-03-31 22:18:52,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:18:52,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452571385] [2023-03-31 22:18:52,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:18:52,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:18:52,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:18:52,989 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 15 proven. 76 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-03-31 22:18:52,989 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:18:52,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452571385] [2023-03-31 22:18:52,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452571385] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:18:52,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089553389] [2023-03-31 22:18:52,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:18:52,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:18:52,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:18:52,991 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:18:53,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 22:18:53,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:18:53,163 INFO L262 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 22:18:53,166 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:18:53,269 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-03-31 22:18:53,269 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 22:18:53,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089553389] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:18:53,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 22:18:53,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-03-31 22:18:53,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835560630] [2023-03-31 22:18:53,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:18:53,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:18:53,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:18:53,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:18:53,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:18:53,271 INFO L87 Difference]: Start difference. First operand 1168 states and 2048 transitions. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 22:18:54,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:18:54,413 INFO L93 Difference]: Finished difference Result 2591 states and 4491 transitions. [2023-03-31 22:18:54,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:18:54,416 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 151 [2023-03-31 22:18:54,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:18:54,421 INFO L225 Difference]: With dead ends: 2591 [2023-03-31 22:18:54,421 INFO L226 Difference]: Without dead ends: 1428 [2023-03-31 22:18:54,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-03-31 22:18:54,424 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 799 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1131 mSolverCounterSat, 585 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 799 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 585 IncrementalHoareTripleChecker+Valid, 1131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-03-31 22:18:54,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [799 Valid, 46 Invalid, 1716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [585 Valid, 1131 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-03-31 22:18:54,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2023-03-31 22:18:54,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 1410. [2023-03-31 22:18:54,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1410 states, 1374 states have (on average 1.5254730713245996) internal successors, (2096), 1386 states have internal predecessors, (2096), 12 states have call successors, (12), 12 states have call predecessors, (12), 23 states have return successors, (68), 11 states have call predecessors, (68), 11 states have call successors, (68) [2023-03-31 22:18:54,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1410 states to 1410 states and 2176 transitions. [2023-03-31 22:18:54,509 INFO L78 Accepts]: Start accepts. Automaton has 1410 states and 2176 transitions. Word has length 151 [2023-03-31 22:18:54,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:18:54,510 INFO L495 AbstractCegarLoop]: Abstraction has 1410 states and 2176 transitions. [2023-03-31 22:18:54,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 22:18:54,510 INFO L276 IsEmpty]: Start isEmpty. Operand 1410 states and 2176 transitions. [2023-03-31 22:18:54,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2023-03-31 22:18:54,514 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:18:54,515 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:18:54,531 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 22:18:54,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-03-31 22:18:54,721 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:18:54,722 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:18:54,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1318943265, now seen corresponding path program 1 times [2023-03-31 22:18:54,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:18:54,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866573547] [2023-03-31 22:18:54,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:18:54,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:18:54,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:18:54,977 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 82 proven. 82 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2023-03-31 22:18:54,978 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:18:54,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866573547] [2023-03-31 22:18:54,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866573547] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:18:54,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117978240] [2023-03-31 22:18:54,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:18:54,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:18:54,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:18:54,981 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:18:55,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 22:18:55,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:18:55,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 807 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 22:18:55,136 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:18:55,210 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 230 proven. 2 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-03-31 22:18:55,210 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:18:55,383 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 82 proven. 82 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2023-03-31 22:18:55,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117978240] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:18:55,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2061880558] [2023-03-31 22:18:55,402 INFO L159 IcfgInterpreter]: Started Sifa with 77 locations of interest [2023-03-31 22:18:55,402 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:18:55,404 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:18:55,409 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:18:55,409 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:18:55,499 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 46 for LOIs [2023-03-31 22:18:55,721 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 59 [2023-03-31 22:18:56,569 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 50 for LOIs [2023-03-31 22:18:56,715 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 59 [2023-03-31 22:19:35,072 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 37 for LOIs [2023-03-31 22:19:35,082 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 22:19:43,290 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14004#(and (= 3 ~inputC~0) (<= calculate_output_~input 6) (= ~a16~0 10) (<= |old(~a15~0)| 4) (<= 5 |old(~a12~0)|) (= ~inputD~0 4) (<= (+ ~a18~0 156) 0) (<= |calculate_output_#in~input| 6) (<= 1 |calculate_output_#in~input|) (= 5 ~inputE~0) (<= |old(~a12~0)| 7) (<= 1 calculate_output_~input) (= 6 ~inputF~0) (<= |old(~a16~0)| 12) (<= 8 |old(~a16~0)|) (<= 3 |old(~a15~0)|) (= |#NULL.offset| 0) (= ~a15~0 3) (= ~inputA~0 1) (<= 0 |#StackHeapBarrier|) (= 7 ~a12~0) (= |#NULL.base| 0) (= 2 ~inputB~0))' at error location [2023-03-31 22:19:43,290 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 22:19:43,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 22:19:43,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-03-31 22:19:43,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478915212] [2023-03-31 22:19:43,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 22:19:43,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-03-31 22:19:43,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:19:43,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-03-31 22:19:43,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2023-03-31 22:19:43,296 INFO L87 Difference]: Start difference. First operand 1410 states and 2176 transitions. Second operand has 10 states, 10 states have (on average 28.9) internal successors, (289), 10 states have internal predecessors, (289), 5 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-03-31 22:19:45,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:19:45,829 INFO L93 Difference]: Finished difference Result 5634 states and 8746 transitions. [2023-03-31 22:19:45,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-03-31 22:19:45,829 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 28.9) internal successors, (289), 10 states have internal predecessors, (289), 5 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 221 [2023-03-31 22:19:45,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:19:45,849 INFO L225 Difference]: With dead ends: 5634 [2023-03-31 22:19:45,850 INFO L226 Difference]: Without dead ends: 4229 [2023-03-31 22:19:45,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 685 GetRequests, 478 SyntacticMatches, 179 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2524 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=178, Invalid=692, Unknown=0, NotChecked=0, Total=870 [2023-03-31 22:19:45,856 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 1623 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 3614 mSolverCounterSat, 965 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1623 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 4579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 965 IncrementalHoareTripleChecker+Valid, 3614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-03-31 22:19:45,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1623 Valid, 126 Invalid, 4579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [965 Valid, 3614 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-03-31 22:19:45,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4229 states. [2023-03-31 22:19:45,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4229 to 4109. [2023-03-31 22:19:45,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4109 states, 4023 states have (on average 1.3432761620681084) internal successors, (5404), 4059 states have internal predecessors, (5404), 25 states have call successors, (25), 25 states have call predecessors, (25), 60 states have return successors, (372), 24 states have call predecessors, (372), 24 states have call successors, (372) [2023-03-31 22:19:45,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4109 states to 4109 states and 5801 transitions. [2023-03-31 22:19:45,950 INFO L78 Accepts]: Start accepts. Automaton has 4109 states and 5801 transitions. Word has length 221 [2023-03-31 22:19:45,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:19:45,951 INFO L495 AbstractCegarLoop]: Abstraction has 4109 states and 5801 transitions. [2023-03-31 22:19:45,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 28.9) internal successors, (289), 10 states have internal predecessors, (289), 5 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-03-31 22:19:45,952 INFO L276 IsEmpty]: Start isEmpty. Operand 4109 states and 5801 transitions. [2023-03-31 22:19:45,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2023-03-31 22:19:45,955 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:19:45,956 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:19:45,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 22:19:46,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:19:46,164 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:19:46,164 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:19:46,164 INFO L85 PathProgramCache]: Analyzing trace with hash 371492623, now seen corresponding path program 1 times [2023-03-31 22:19:46,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:19:46,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131924677] [2023-03-31 22:19:46,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:19:46,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:19:46,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat