/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain IntervalDomain -i ../sv-benchmarks/c/eca-rers2012/Problem03_label17.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 21:18:46,091 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 21:18:46,093 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 21:18:46,120 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 21:18:46,124 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 21:18:46,127 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 21:18:46,130 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 21:18:46,132 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 21:18:46,133 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 21:18:46,137 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 21:18:46,138 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 21:18:46,140 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 21:18:46,140 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 21:18:46,143 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 21:18:46,144 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 21:18:46,145 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 21:18:46,145 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 21:18:46,146 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 21:18:46,148 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 21:18:46,154 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 21:18:46,155 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 21:18:46,156 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 21:18:46,157 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 21:18:46,158 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 21:18:46,165 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 21:18:46,165 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 21:18:46,165 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 21:18:46,166 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 21:18:46,167 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 21:18:46,167 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 21:18:46,168 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 21:18:46,168 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 21:18:46,169 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 21:18:46,170 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 21:18:46,170 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 21:18:46,170 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 21:18:46,171 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 21:18:46,171 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 21:18:46,171 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 21:18:46,171 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 21:18:46,172 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 21:18:46,173 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-03-31 21:18:46,201 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 21:18:46,201 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 21:18:46,201 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 21:18:46,201 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 21:18:46,202 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 21:18:46,202 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 21:18:46,202 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 21:18:46,202 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 21:18:46,202 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 21:18:46,202 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 21:18:46,203 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 21:18:46,203 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 21:18:46,203 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 21:18:46,203 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 21:18:46,203 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 21:18:46,204 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 21:18:46,204 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 21:18:46,204 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 21:18:46,204 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 21:18:46,204 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 21:18:46,204 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 21:18:46,204 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 21:18:46,204 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 21:18:46,204 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 21:18:46,205 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 21:18:46,205 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 21:18:46,205 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 21:18:46,205 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 21:18:46,205 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 21:18:46,205 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 21:18:46,205 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 21:18:46,205 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 21:18:46,205 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:18:46,205 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 21:18:46,205 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 21:18:46,206 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 21:18:46,206 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 21:18:46,206 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 21:18:46,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 21:18:46,206 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 21:18:46,206 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 21:18:46,206 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 21:18:46,449 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 21:18:46,476 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 21:18:46,477 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 21:18:46,478 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 21:18:46,479 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 21:18:46,480 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label17.c [2023-03-31 21:18:47,558 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 21:18:47,867 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 21:18:47,867 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label17.c [2023-03-31 21:18:47,888 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/796540c31/8efb89007767452889bb718a96e90639/FLAG29e631548 [2023-03-31 21:18:47,901 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/796540c31/8efb89007767452889bb718a96e90639 [2023-03-31 21:18:47,903 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 21:18:47,904 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 21:18:47,906 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 21:18:47,906 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 21:18:47,908 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 21:18:47,909 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:18:47" (1/1) ... [2023-03-31 21:18:47,910 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c436377 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:18:47, skipping insertion in model container [2023-03-31 21:18:47,910 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:18:47" (1/1) ... [2023-03-31 21:18:47,914 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 21:18:47,963 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 21:18:48,340 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label17.c[61094,61107] [2023-03-31 21:18:48,364 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:18:48,373 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 21:18:48,513 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label17.c[61094,61107] [2023-03-31 21:18:48,518 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:18:48,530 INFO L208 MainTranslator]: Completed translation [2023-03-31 21:18:48,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:18:48 WrapperNode [2023-03-31 21:18:48,531 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 21:18:48,531 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 21:18:48,532 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 21:18:48,532 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 21:18:48,539 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:18:48" (1/1) ... [2023-03-31 21:18:48,539 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:18:48" (1/1) ... [2023-03-31 21:18:48,564 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:18:48" (1/1) ... [2023-03-31 21:18:48,565 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:18:48" (1/1) ... [2023-03-31 21:18:48,628 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:18:48" (1/1) ... [2023-03-31 21:18:48,637 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:18:48" (1/1) ... [2023-03-31 21:18:48,644 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:18:48" (1/1) ... [2023-03-31 21:18:48,649 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:18:48" (1/1) ... [2023-03-31 21:18:48,657 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 21:18:48,657 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 21:18:48,658 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 21:18:48,658 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 21:18:48,658 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:18:48" (1/1) ... [2023-03-31 21:18:48,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:18:48,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:18:48,694 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-31 21:18:48,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-31 21:18:48,776 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 21:18:48,776 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 21:18:48,776 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 21:18:48,777 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 21:18:48,778 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 21:18:48,778 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 21:18:48,778 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 21:18:48,778 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 21:18:48,778 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 21:18:48,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 21:18:48,778 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 21:18:48,778 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 21:18:48,778 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 21:18:48,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 21:18:48,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 21:18:48,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 21:18:48,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 21:18:48,779 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 21:18:48,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 21:18:48,856 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 21:18:48,870 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 21:18:50,274 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 21:18:50,457 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 21:18:50,457 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 21:18:50,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:18:50 BoogieIcfgContainer [2023-03-31 21:18:50,460 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 21:18:50,462 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 21:18:50,462 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 21:18:50,466 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 21:18:50,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 09:18:47" (1/3) ... [2023-03-31 21:18:50,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@485a16f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:18:50, skipping insertion in model container [2023-03-31 21:18:50,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:18:48" (2/3) ... [2023-03-31 21:18:50,467 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@485a16f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:18:50, skipping insertion in model container [2023-03-31 21:18:50,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:18:50" (3/3) ... [2023-03-31 21:18:50,468 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label17.c [2023-03-31 21:18:50,481 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 21:18:50,481 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 21:18:50,525 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 21:18:50,530 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;@22f28f03, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 21:18:50,531 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 21:18:50,535 INFO L276 IsEmpty]: Start isEmpty. Operand has 158 states, 150 states have (on average 1.9466666666666668) internal successors, (292), 151 states have internal predecessors, (292), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 21:18:50,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-03-31 21:18:50,545 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:18:50,546 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:18:50,546 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:18:50,549 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:18:50,550 INFO L85 PathProgramCache]: Analyzing trace with hash 597543670, now seen corresponding path program 1 times [2023-03-31 21:18:50,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:18:50,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492587081] [2023-03-31 21:18:50,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:18:50,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:18:50,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:18:51,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:18:51,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:18:51,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492587081] [2023-03-31 21:18:51,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492587081] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:18:51,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:18:51,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 21:18:51,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904010672] [2023-03-31 21:18:51,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:18:51,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 21:18:51,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:18:51,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 21:18:51,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 21:18:51,567 INFO L87 Difference]: Start difference. First operand has 158 states, 150 states have (on average 1.9466666666666668) internal successors, (292), 151 states have internal predecessors, (292), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 21:18:52,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:18:52,252 INFO L93 Difference]: Finished difference Result 462 states and 886 transitions. [2023-03-31 21:18:52,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 21:18:52,254 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 149 [2023-03-31 21:18:52,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:18:52,268 INFO L225 Difference]: With dead ends: 462 [2023-03-31 21:18:52,268 INFO L226 Difference]: Without dead ends: 301 [2023-03-31 21:18:52,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 21:18:52,275 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 34 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-03-31 21:18:52,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 70 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-03-31 21:18:52,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2023-03-31 21:18:52,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2023-03-31 21:18:52,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 293 states have (on average 1.7747440273037542) internal successors, (520), 293 states have internal predecessors, (520), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-03-31 21:18:52,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 529 transitions. [2023-03-31 21:18:52,330 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 529 transitions. Word has length 149 [2023-03-31 21:18:52,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:18:52,330 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 529 transitions. [2023-03-31 21:18:52,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 21:18:52,331 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 529 transitions. [2023-03-31 21:18:52,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2023-03-31 21:18:52,333 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:18:52,333 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:18:52,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 21:18:52,334 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:18:52,334 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:18:52,334 INFO L85 PathProgramCache]: Analyzing trace with hash -848538923, now seen corresponding path program 1 times [2023-03-31 21:18:52,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:18:52,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465500754] [2023-03-31 21:18:52,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:18:52,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:18:52,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:18:52,665 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:18:52,666 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:18:52,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465500754] [2023-03-31 21:18:52,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465500754] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:18:52,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:18:52,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:18:52,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410242997] [2023-03-31 21:18:52,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:18:52,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:18:52,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:18:52,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:18:52,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:18:52,669 INFO L87 Difference]: Start difference. First operand 301 states and 529 transitions. Second operand has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:18:53,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:18:53,479 INFO L93 Difference]: Finished difference Result 917 states and 1632 transitions. [2023-03-31 21:18:53,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 21:18:53,480 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 161 [2023-03-31 21:18:53,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:18:53,484 INFO L225 Difference]: With dead ends: 917 [2023-03-31 21:18:53,484 INFO L226 Difference]: Without dead ends: 621 [2023-03-31 21:18:53,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-31 21:18:53,486 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 492 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-03-31 21:18:53,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [492 Valid, 48 Invalid, 1119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 862 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-03-31 21:18:53,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2023-03-31 21:18:53,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 607. [2023-03-31 21:18:53,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 589 states have (on average 1.7215619694397284) internal successors, (1014), 595 states have internal predecessors, (1014), 6 states have call successors, (6), 6 states have call predecessors, (6), 11 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) [2023-03-31 21:18:53,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 1046 transitions. [2023-03-31 21:18:53,506 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 1046 transitions. Word has length 161 [2023-03-31 21:18:53,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:18:53,506 INFO L495 AbstractCegarLoop]: Abstraction has 607 states and 1046 transitions. [2023-03-31 21:18:53,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:18:53,507 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 1046 transitions. [2023-03-31 21:18:53,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2023-03-31 21:18:53,509 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:18:53,509 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:18:53,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 21:18:53,510 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:18:53,510 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:18:53,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1298788492, now seen corresponding path program 1 times [2023-03-31 21:18:53,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:18:53,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014271776] [2023-03-31 21:18:53,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:18:53,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:18:53,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:18:53,926 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:18:53,926 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:18:53,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014271776] [2023-03-31 21:18:53,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014271776] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:18:53,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:18:53,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:18:53,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676266168] [2023-03-31 21:18:53,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:18:53,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:18:53,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:18:53,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:18:53,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:18:53,928 INFO L87 Difference]: Start difference. First operand 607 states and 1046 transitions. Second operand has 5 states, 5 states have (on average 34.0) internal successors, (170), 4 states have internal predecessors, (170), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:18:54,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:18:54,611 INFO L93 Difference]: Finished difference Result 1881 states and 3380 transitions. [2023-03-31 21:18:54,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 21:18:54,612 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 34.0) internal successors, (170), 4 states have internal predecessors, (170), 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 176 [2023-03-31 21:18:54,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:18:54,617 INFO L225 Difference]: With dead ends: 1881 [2023-03-31 21:18:54,617 INFO L226 Difference]: Without dead ends: 1279 [2023-03-31 21:18:54,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-31 21:18:54,619 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 478 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-03-31 21:18:54,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [478 Valid, 39 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-03-31 21:18:54,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2023-03-31 21:18:54,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1255. [2023-03-31 21:18:54,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1255 states, 1199 states have (on average 1.4962468723936613) internal successors, (1794), 1235 states have internal predecessors, (1794), 10 states have call successors, (10), 10 states have call predecessors, (10), 45 states have return successors, (147), 9 states have call predecessors, (147), 9 states have call successors, (147) [2023-03-31 21:18:54,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1255 states to 1255 states and 1951 transitions. [2023-03-31 21:18:54,649 INFO L78 Accepts]: Start accepts. Automaton has 1255 states and 1951 transitions. Word has length 176 [2023-03-31 21:18:54,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:18:54,649 INFO L495 AbstractCegarLoop]: Abstraction has 1255 states and 1951 transitions. [2023-03-31 21:18:54,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.0) internal successors, (170), 4 states have internal predecessors, (170), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:18:54,650 INFO L276 IsEmpty]: Start isEmpty. Operand 1255 states and 1951 transitions. [2023-03-31 21:18:54,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2023-03-31 21:18:54,653 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:18:54,653 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:18:54,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 21:18:54,653 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:18:54,653 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:18:54,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1395149654, now seen corresponding path program 1 times [2023-03-31 21:18:54,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:18:54,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108101379] [2023-03-31 21:18:54,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:18:54,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:18:54,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:18:55,072 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:18:55,073 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:18:55,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108101379] [2023-03-31 21:18:55,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108101379] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:18:55,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139149336] [2023-03-31 21:18:55,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:18:55,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:18:55,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:18:55,076 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 21:18:55,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 21:18:55,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:18:55,297 INFO L262 TraceCheckSpWp]: Trace formula consists of 1075 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 21:18:55,304 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:18:55,424 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:18:55,425 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:18:55,532 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:18:55,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139149336] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:18:55,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [446502126] [2023-03-31 21:18:55,557 INFO L159 IcfgInterpreter]: Started Sifa with 153 locations of interest [2023-03-31 21:18:55,557 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:18:55,563 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:18:55,567 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:18:55,567 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:18:56,177 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 162 for LOIs [2023-03-31 21:18:58,412 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 148 for LOIs