/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/eca-rers2012/Problem18_label10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:25:50,305 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:25:50,308 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:25:50,350 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:25:50,350 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:25:50,354 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:25:50,357 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:25:50,359 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:25:50,360 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:25:50,361 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:25:50,363 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:25:50,364 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:25:50,365 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:25:50,365 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:25:50,366 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:25:50,367 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:25:50,368 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:25:50,368 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:25:50,369 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:25:50,371 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:25:50,372 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:25:50,378 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:25:50,380 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:25:50,381 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:25:50,387 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 04:25:50,390 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:25:50,390 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:25:50,391 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:25:50,391 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:25:50,392 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:25:50,392 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:25:50,393 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:25:50,393 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:25:50,393 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:25:50,394 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:25:50,394 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:25:50,399 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 04:25:50,430 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:25:50,430 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:25:50,431 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:25:50,431 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:25:50,432 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:25:50,432 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:25:50,432 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:25:50,432 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:25:50,432 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:25:50,432 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:25:50,433 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:25:50,433 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:25:50,433 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:25:50,434 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:25:50,434 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:25:50,434 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:25:50,434 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:25:50,434 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:25:50,435 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:25:50,435 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:25:50,435 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:25:50,435 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:25:50,435 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:25:50,435 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:25:50,435 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:25:50,435 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:25:50,436 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:25:50,436 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:25:50,436 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:25:50,436 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:25:50,436 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:25:50,436 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:25:50,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:25:50,437 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:25:50,437 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:25:50,437 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:25:50,437 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:25:50,437 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:25:50,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:25:50,437 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:25:50,437 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:25:50,438 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:25:50,666 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:25:50,689 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:25:50,692 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:25:50,693 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:25:50,694 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:25:50,695 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem18_label10.c [2023-04-01 04:25:51,817 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:25:52,222 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:25:52,222 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label10.c [2023-04-01 04:25:52,252 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0ba38ed7/bbbfde386fc6419b863c4a96b6cf1289/FLAG21bcca509 [2023-04-01 04:25:52,268 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0ba38ed7/bbbfde386fc6419b863c4a96b6cf1289 [2023-04-01 04:25:52,271 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:25:52,274 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:25:52,275 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:25:52,275 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:25:52,278 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:25:52,279 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:25:52" (1/1) ... [2023-04-01 04:25:52,280 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16e7f202 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:25:52, skipping insertion in model container [2023-04-01 04:25:52,281 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:25:52" (1/1) ... [2023-04-01 04:25:52,287 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:25:52,393 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:25:52,630 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/Problem18_label10.c[2213,2226] [2023-04-01 04:25:53,223 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:25:53,234 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:25:53,256 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/Problem18_label10.c[2213,2226] [2023-04-01 04:25:53,521 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:25:53,543 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:25:53,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:25:53 WrapperNode [2023-04-01 04:25:53,543 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:25:53,545 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:25:53,545 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:25:53,545 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:25:53,556 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:25:53" (1/1) ... [2023-04-01 04:25:53,556 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:25:53" (1/1) ... [2023-04-01 04:25:53,611 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:25:53" (1/1) ... [2023-04-01 04:25:53,611 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:25:53" (1/1) ... [2023-04-01 04:25:53,684 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:25:53" (1/1) ... [2023-04-01 04:25:53,708 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:25:53" (1/1) ... [2023-04-01 04:25:53,732 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:25:53" (1/1) ... [2023-04-01 04:25:53,745 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:25:53" (1/1) ... [2023-04-01 04:25:53,764 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:25:53,765 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:25:53,766 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:25:53,766 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:25:53,767 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:25:53" (1/1) ... [2023-04-01 04:25:53,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:25:53,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:25:53,798 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 04:25:53,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 04:25:53,837 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:25:53,837 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:25:53,837 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:25:53,838 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:25:53,838 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:25:53,838 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 04:25:53,838 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:25:53,838 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:25:53,838 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:25:53,838 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 04:25:53,838 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:25:53,838 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:25:53,838 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:25:53,838 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:25:53,839 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:25:53,839 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:25:53,839 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:25:53,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:25:53,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:25:53,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:25:53,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:25:53,841 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:25:53,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:25:53,944 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:25:53,946 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:25:56,852 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:26:03,843 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:26:03,844 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:26:03,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:26:03 BoogieIcfgContainer [2023-04-01 04:26:03,848 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:26:03,852 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:26:03,852 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:26:03,855 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:26:03,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:25:52" (1/3) ... [2023-04-01 04:26:03,856 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12efe402 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:26:03, skipping insertion in model container [2023-04-01 04:26:03,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:25:53" (2/3) ... [2023-04-01 04:26:03,856 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12efe402 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:26:03, skipping insertion in model container [2023-04-01 04:26:03,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:26:03" (3/3) ... [2023-04-01 04:26:03,858 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label10.c [2023-04-01 04:26:03,877 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:26:03,877 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:26:03,926 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:26:03,932 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;@7062ce98, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:26:03,932 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:26:03,938 INFO L276 IsEmpty]: Start isEmpty. Operand has 469 states, 457 states have (on average 1.9715536105032823) internal successors, (901), 458 states have internal predecessors, (901), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 04:26:03,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:26:03,945 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:26:03,945 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:26:03,946 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:26:03,950 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:26:03,951 INFO L85 PathProgramCache]: Analyzing trace with hash 510739684, now seen corresponding path program 1 times [2023-04-01 04:26:03,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:26:03,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100497318] [2023-04-01 04:26:03,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:26:03,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:26:04,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:26:04,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:26:04,325 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:26:04,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100497318] [2023-04-01 04:26:04,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100497318] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:26:04,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:26:04,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:26:04,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850242837] [2023-04-01 04:26:04,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:26:04,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:26:04,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:26:04,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:26:04,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:26:04,370 INFO L87 Difference]: Start difference. First operand has 469 states, 457 states have (on average 1.9715536105032823) internal successors, (901), 458 states have internal predecessors, (901), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:26:06,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:26:06,536 INFO L93 Difference]: Finished difference Result 1393 states and 2727 transitions. [2023-04-01 04:26:06,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:26:06,540 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 04:26:06,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:26:06,559 INFO L225 Difference]: With dead ends: 1393 [2023-04-01 04:26:06,559 INFO L226 Difference]: Without dead ends: 921 [2023-04-01 04:26:06,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:26:06,570 INFO L413 NwaCegarLoop]: 318 mSDtfsCounter, 515 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 1352 mSolverCounterSat, 455 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 1807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 455 IncrementalHoareTripleChecker+Valid, 1352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:26:06,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [515 Valid, 339 Invalid, 1807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [455 Valid, 1352 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-04-01 04:26:06,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2023-04-01 04:26:06,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 919. [2023-04-01 04:26:06,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 905 states have (on average 1.6519337016574585) internal successors, (1495), 905 states have internal predecessors, (1495), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-04-01 04:26:06,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1512 transitions. [2023-04-01 04:26:06,669 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1512 transitions. Word has length 11 [2023-04-01 04:26:06,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:26:06,669 INFO L495 AbstractCegarLoop]: Abstraction has 919 states and 1512 transitions. [2023-04-01 04:26:06,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:26:06,670 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1512 transitions. [2023-04-01 04:26:06,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 04:26:06,671 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:26:06,671 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:26:06,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:26:06,672 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:26:06,673 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:26:06,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1363833710, now seen corresponding path program 1 times [2023-04-01 04:26:06,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:26:06,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47754065] [2023-04-01 04:26:06,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:26:06,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:26:06,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:26:06,839 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:26:06,840 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:26:06,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47754065] [2023-04-01 04:26:06,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47754065] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:26:06,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:26:06,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:26:06,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061937569] [2023-04-01 04:26:06,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:26:06,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:26:06,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:26:06,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:26:06,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:26:06,844 INFO L87 Difference]: Start difference. First operand 919 states and 1512 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:26:09,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:26:09,732 INFO L93 Difference]: Finished difference Result 2781 states and 4622 transitions. [2023-04-01 04:26:09,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:26:09,738 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 21 [2023-04-01 04:26:09,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:26:09,749 INFO L225 Difference]: With dead ends: 2781 [2023-04-01 04:26:09,749 INFO L226 Difference]: Without dead ends: 1867 [2023-04-01 04:26:09,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:26:09,761 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 1548 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 3056 mSolverCounterSat, 701 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1548 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 3757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 701 IncrementalHoareTripleChecker+Valid, 3056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-04-01 04:26:09,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1548 Valid, 83 Invalid, 3757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [701 Valid, 3056 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-04-01 04:26:09,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1867 states. [2023-04-01 04:26:09,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1867 to 1822. [2023-04-01 04:26:09,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1822 states, 1792 states have (on average 1.5412946428571428) internal successors, (2762), 1796 states have internal predecessors, (2762), 11 states have call successors, (11), 11 states have call predecessors, (11), 18 states have return successors, (50), 14 states have call predecessors, (50), 10 states have call successors, (50) [2023-04-01 04:26:09,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 2823 transitions. [2023-04-01 04:26:09,848 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 2823 transitions. Word has length 21 [2023-04-01 04:26:09,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:26:09,849 INFO L495 AbstractCegarLoop]: Abstraction has 1822 states and 2823 transitions. [2023-04-01 04:26:09,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:26:09,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 2823 transitions. [2023-04-01 04:26:09,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 04:26:09,850 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:26:09,850 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] [2023-04-01 04:26:09,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:26:09,850 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:26:09,852 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:26:09,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1686859338, now seen corresponding path program 1 times [2023-04-01 04:26:09,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:26:09,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225881232] [2023-04-01 04:26:09,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:26:09,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:26:09,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:26:09,984 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:26:09,984 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:26:09,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225881232] [2023-04-01 04:26:09,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225881232] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:26:09,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:26:09,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:26:09,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104868828] [2023-04-01 04:26:09,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:26:09,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:26:09,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:26:09,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:26:09,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:26:09,987 INFO L87 Difference]: Start difference. First operand 1822 states and 2823 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:26:12,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:26:12,593 INFO L93 Difference]: Finished difference Result 5051 states and 8054 transitions. [2023-04-01 04:26:12,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:26:12,594 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 25 [2023-04-01 04:26:12,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:26:12,609 INFO L225 Difference]: With dead ends: 5051 [2023-04-01 04:26:12,610 INFO L226 Difference]: Without dead ends: 3234 [2023-04-01 04:26:12,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:26:12,615 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 1718 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 2397 mSolverCounterSat, 910 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1718 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 3307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 910 IncrementalHoareTripleChecker+Valid, 2397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-04-01 04:26:12,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1718 Valid, 66 Invalid, 3307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [910 Valid, 2397 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-04-01 04:26:12,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3234 states. [2023-04-01 04:26:12,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3234 to 3207. [2023-04-01 04:26:12,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3207 states, 3152 states have (on average 1.3981598984771573) internal successors, (4407), 3163 states have internal predecessors, (4407), 17 states have call successors, (17), 17 states have call predecessors, (17), 37 states have return successors, (145), 26 states have call predecessors, (145), 16 states have call successors, (145) [2023-04-01 04:26:12,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3207 states to 3207 states and 4569 transitions. [2023-04-01 04:26:12,701 INFO L78 Accepts]: Start accepts. Automaton has 3207 states and 4569 transitions. Word has length 25 [2023-04-01 04:26:12,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:26:12,701 INFO L495 AbstractCegarLoop]: Abstraction has 3207 states and 4569 transitions. [2023-04-01 04:26:12,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:26:12,702 INFO L276 IsEmpty]: Start isEmpty. Operand 3207 states and 4569 transitions. [2023-04-01 04:26:12,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-01 04:26:12,703 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:26:12,703 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] [2023-04-01 04:26:12,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:26:12,703 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:26:12,704 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:26:12,704 INFO L85 PathProgramCache]: Analyzing trace with hash -42858099, now seen corresponding path program 1 times [2023-04-01 04:26:12,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:26:12,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694134464] [2023-04-01 04:26:12,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:26:12,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:26:12,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:26:12,811 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:26:12,812 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:26:12,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694134464] [2023-04-01 04:26:12,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694134464] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:26:12,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:26:12,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:26:12,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823363923] [2023-04-01 04:26:12,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:26:12,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:26:12,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:26:12,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:26:12,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:26:12,814 INFO L87 Difference]: Start difference. First operand 3207 states and 4569 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 04:26:14,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:26:14,749 INFO L93 Difference]: Finished difference Result 9134 states and 12952 transitions. [2023-04-01 04:26:14,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:26:14,757 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 58 [2023-04-01 04:26:14,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:26:14,788 INFO L225 Difference]: With dead ends: 9134 [2023-04-01 04:26:14,788 INFO L226 Difference]: Without dead ends: 5932 [2023-04-01 04:26:14,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:26:14,803 INFO L413 NwaCegarLoop]: 816 mSDtfsCounter, 450 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1554 mSolverCounterSat, 315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 1869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 1554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-04-01 04:26:14,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [450 Valid, 838 Invalid, 1869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [315 Valid, 1554 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-04-01 04:26:14,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5932 states. [2023-04-01 04:26:14,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5932 to 5792. [2023-04-01 04:26:14,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5792 states, 5701 states have (on average 1.278196807577618) internal successors, (7287), 5722 states have internal predecessors, (7287), 29 states have call successors, (29), 29 states have call predecessors, (29), 61 states have return successors, (355), 40 states have call predecessors, (355), 28 states have call successors, (355) [2023-04-01 04:26:14,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5792 states to 5792 states and 7671 transitions. [2023-04-01 04:26:14,967 INFO L78 Accepts]: Start accepts. Automaton has 5792 states and 7671 transitions. Word has length 58 [2023-04-01 04:26:14,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:26:14,968 INFO L495 AbstractCegarLoop]: Abstraction has 5792 states and 7671 transitions. [2023-04-01 04:26:14,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 04:26:14,968 INFO L276 IsEmpty]: Start isEmpty. Operand 5792 states and 7671 transitions. [2023-04-01 04:26:14,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-04-01 04:26:14,977 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:26:14,977 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:26:14,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 04:26:14,978 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:26:14,978 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:26:14,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1724195028, now seen corresponding path program 1 times [2023-04-01 04:26:14,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:26:14,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865122178] [2023-04-01 04:26:14,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:26:14,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:26:15,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:26:15,289 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:26:15,290 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:26:15,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865122178] [2023-04-01 04:26:15,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865122178] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:26:15,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637239540] [2023-04-01 04:26:15,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:26:15,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:26:15,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:26:15,294 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:26:15,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 04:26:15,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:26:15,427 INFO L262 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:26:15,434 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:26:15,573 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:26:15,574 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:26:15,748 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:26:15,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637239540] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:26:15,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1294608264] [2023-04-01 04:26:15,778 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2023-04-01 04:26:15,778 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:26:15,781 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:26:15,786 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:26:15,787 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:26:15,954 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 44 for LOIs [2023-04-01 04:26:16,069 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2023-04-01 04:26:16,204 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 15238 conjuctions. This might take some time... [2023-04-01 04:26:17,221 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 604 conjuctions. [2023-04-01 04:26:48,328 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 49