/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/eca-rers2012/Problem16_label46.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:19:45,615 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:19:45,617 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:19:45,635 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:19:45,635 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:19:45,636 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:19:45,637 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:19:45,638 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:19:45,639 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:19:45,639 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:19:45,640 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:19:45,641 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:19:45,641 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:19:45,641 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:19:45,642 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:19:45,643 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:19:45,643 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:19:45,644 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:19:45,645 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:19:45,646 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:19:45,647 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:19:45,661 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:19:45,662 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:19:45,663 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:19:45,665 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:19:45,665 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:19:45,665 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:19:45,666 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:19:45,666 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:19:45,666 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:19:45,666 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:19:45,667 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:19:45,667 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:19:45,668 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:19:45,668 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:19:45,668 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:19:45,669 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:19:45,669 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:19:45,669 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:19:45,669 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:19:45,670 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:19:45,670 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 04:19:45,692 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:19:45,692 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:19:45,692 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:19:45,692 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:19:45,693 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:19:45,693 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:19:45,693 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:19:45,693 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:19:45,693 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:19:45,694 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:19:45,694 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:19:45,694 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:19:45,694 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:19:45,694 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:19:45,694 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:19:45,695 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:19:45,695 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:19:45,695 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:19:45,695 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:19:45,695 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:19:45,695 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:19:45,695 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:19:45,696 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:19:45,696 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:19:45,696 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:19:45,696 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:19:45,696 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:19:45,696 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:19:45,696 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:19:45,696 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:19:45,696 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:19:45,696 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:19:45,697 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:19:45,697 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:19:45,697 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:19:45,697 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:19:45,697 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:19:45,697 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:19:45,697 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:19:45,697 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:19:45,697 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:19:45,697 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:19:45,861 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:19:45,883 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:19:45,885 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:19:45,886 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:19:45,886 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:19:45,887 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem16_label46.c [2023-04-01 04:19:46,878 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:19:47,140 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:19:47,141 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label46.c [2023-04-01 04:19:47,159 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5dc83d945/afd488a3201a44a28881c9a5a9f17525/FLAG4d587d14a [2023-04-01 04:19:47,494 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5dc83d945/afd488a3201a44a28881c9a5a9f17525 [2023-04-01 04:19:47,497 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:19:47,499 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:19:47,501 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:19:47,502 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:19:47,504 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:19:47,505 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:19:47" (1/1) ... [2023-04-01 04:19:47,506 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cc31fdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:19:47, skipping insertion in model container [2023-04-01 04:19:47,507 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:19:47" (1/1) ... [2023-04-01 04:19:47,513 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:19:47,567 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:19:47,683 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label46.c[1899,1912] [2023-04-01 04:19:48,000 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:19:48,010 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:19:48,027 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label46.c[1899,1912] [2023-04-01 04:19:48,134 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:19:48,147 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:19:48,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:19:48 WrapperNode [2023-04-01 04:19:48,148 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:19:48,149 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:19:48,149 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:19:48,149 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:19:48,158 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:19:48" (1/1) ... [2023-04-01 04:19:48,159 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:19:48" (1/1) ... [2023-04-01 04:19:48,192 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:19:48" (1/1) ... [2023-04-01 04:19:48,193 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:19:48" (1/1) ... [2023-04-01 04:19:48,243 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:19:48" (1/1) ... [2023-04-01 04:19:48,264 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:19:48" (1/1) ... [2023-04-01 04:19:48,271 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:19:48" (1/1) ... [2023-04-01 04:19:48,279 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:19:48" (1/1) ... [2023-04-01 04:19:48,289 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:19:48,290 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:19:48,290 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:19:48,290 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:19:48,292 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:19:48" (1/1) ... [2023-04-01 04:19:48,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:19:48,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:19:48,339 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 04:19:48,349 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 04:19:48,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:19:48,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:19:48,381 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:19:48,382 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:19:48,382 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:19:48,382 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:19:48,382 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:19:48,382 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:19:48,382 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:19:48,382 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:19:48,382 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:19:48,383 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:19:48,383 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:19:48,383 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:19:48,383 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:19:48,383 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:19:48,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:19:48,383 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:19:48,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:19:48,384 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:19:48,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:19:48,452 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:19:48,454 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:19:49,880 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:19:50,773 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:19:50,773 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:19:50,779 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:19:50 BoogieIcfgContainer [2023-04-01 04:19:50,779 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:19:50,782 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:19:50,782 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:19:50,784 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:19:50,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:19:47" (1/3) ... [2023-04-01 04:19:50,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79b13dbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:19:50, skipping insertion in model container [2023-04-01 04:19:50,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:19:48" (2/3) ... [2023-04-01 04:19:50,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79b13dbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:19:50, skipping insertion in model container [2023-04-01 04:19:50,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:19:50" (3/3) ... [2023-04-01 04:19:50,787 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label46.c [2023-04-01 04:19:50,805 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:19:50,805 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:19:50,857 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:19:50,863 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;@58af4d2c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:19:50,863 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:19:50,869 INFO L276 IsEmpty]: Start isEmpty. Operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 04:19:50,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:19:50,875 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:19:50,876 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:19:50,877 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:19:50,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:19:50,882 INFO L85 PathProgramCache]: Analyzing trace with hash -706740890, now seen corresponding path program 1 times [2023-04-01 04:19:50,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:19:50,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714989317] [2023-04-01 04:19:50,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:19:50,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:19:51,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:19:51,185 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 04:19:51,186 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:19:51,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714989317] [2023-04-01 04:19:51,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714989317] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:19:51,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:19:51,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:19:51,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736132969] [2023-04-01 04:19:51,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:19:51,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:19:51,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:19:51,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:19:51,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:19:51,226 INFO L87 Difference]: Start difference. First operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:19:52,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:19:52,239 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2023-04-01 04:19:52,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:19:52,241 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 04:19:52,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:19:52,251 INFO L225 Difference]: With dead ends: 718 [2023-04-01 04:19:52,251 INFO L226 Difference]: Without dead ends: 471 [2023-04-01 04:19:52,255 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 04:19:52,258 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 268 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 376 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 1028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 376 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-01 04:19:52,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 69 Invalid, 1028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [376 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-01 04:19:52,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-04-01 04:19:52,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 466. [2023-04-01 04:19:52,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 456 states have (on average 1.8837719298245614) internal successors, (859), 456 states have internal predecessors, (859), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-01 04:19:52,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 870 transitions. [2023-04-01 04:19:52,303 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 870 transitions. Word has length 11 [2023-04-01 04:19:52,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:19:52,303 INFO L495 AbstractCegarLoop]: Abstraction has 466 states and 870 transitions. [2023-04-01 04:19:52,303 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 04:19:52,303 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 870 transitions. [2023-04-01 04:19:52,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-01 04:19:52,305 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:19:52,305 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] [2023-04-01 04:19:52,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:19:52,305 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:19:52,305 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:19:52,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1705304284, now seen corresponding path program 1 times [2023-04-01 04:19:52,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:19:52,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012496772] [2023-04-01 04:19:52,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:19:52,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:19:52,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:19:52,419 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 04:19:52,420 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:19:52,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012496772] [2023-04-01 04:19:52,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012496772] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:19:52,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:19:52,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:19:52,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46054341] [2023-04-01 04:19:52,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:19:52,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:19:52,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:19:52,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:19:52,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:19:52,422 INFO L87 Difference]: Start difference. First operand 466 states and 870 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 04:19:53,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:19:53,659 INFO L93 Difference]: Finished difference Result 1402 states and 2643 transitions. [2023-04-01 04:19:53,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:19:53,660 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 24 [2023-04-01 04:19:53,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:19:53,666 INFO L225 Difference]: With dead ends: 1402 [2023-04-01 04:19:53,666 INFO L226 Difference]: Without dead ends: 941 [2023-04-01 04:19:53,680 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 04:19:53,681 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 992 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1144 mSolverCounterSat, 440 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 992 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 440 IncrementalHoareTripleChecker+Valid, 1144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-01 04:19:53,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [992 Valid, 45 Invalid, 1584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [440 Valid, 1144 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-01 04:19:53,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2023-04-01 04:19:53,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 933. [2023-04-01 04:19:53,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 933 states, 913 states have (on average 1.6527929901423877) internal successors, (1509), 917 states have internal predecessors, (1509), 8 states have call successors, (8), 8 states have call predecessors, (8), 11 states have return successors, (27), 7 states have call predecessors, (27), 7 states have call successors, (27) [2023-04-01 04:19:53,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 933 states to 933 states and 1544 transitions. [2023-04-01 04:19:53,715 INFO L78 Accepts]: Start accepts. Automaton has 933 states and 1544 transitions. Word has length 24 [2023-04-01 04:19:53,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:19:53,715 INFO L495 AbstractCegarLoop]: Abstraction has 933 states and 1544 transitions. [2023-04-01 04:19:53,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 04:19:53,715 INFO L276 IsEmpty]: Start isEmpty. Operand 933 states and 1544 transitions. [2023-04-01 04:19:53,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-04-01 04:19:53,726 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:19:53,726 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2023-04-01 04:19:53,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:19:53,726 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:19:53,726 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:19:53,727 INFO L85 PathProgramCache]: Analyzing trace with hash -874201817, now seen corresponding path program 1 times [2023-04-01 04:19:53,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:19:53,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274499815] [2023-04-01 04:19:53,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:19:53,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:19:53,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:19:53,968 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 04:19:53,968 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:19:53,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274499815] [2023-04-01 04:19:53,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274499815] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:19:53,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852433513] [2023-04-01 04:19:53,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:19:53,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:19:53,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:19:53,973 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 04:19:53,997 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 04:19:54,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:19:54,084 INFO L262 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 04:19:54,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:19:54,224 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 04:19:54,225 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 04:19:54,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852433513] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:19:54,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 04:19:54,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 04:19:54,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985483130] [2023-04-01 04:19:54,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:19:54,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:19:54,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:19:54,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:19:54,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:19:54,227 INFO L87 Difference]: Start difference. First operand 933 states and 1544 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 04:19:55,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:19:55,427 INFO L93 Difference]: Finished difference Result 2571 states and 4271 transitions. [2023-04-01 04:19:55,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:19:55,428 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 80 [2023-04-01 04:19:55,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:19:55,435 INFO L225 Difference]: With dead ends: 2571 [2023-04-01 04:19:55,435 INFO L226 Difference]: Without dead ends: 1643 [2023-04-01 04:19:55,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-04-01 04:19:55,437 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 793 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1143 mSolverCounterSat, 579 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 793 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 579 IncrementalHoareTripleChecker+Valid, 1143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:19:55,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [793 Valid, 46 Invalid, 1722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [579 Valid, 1143 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-01 04:19:55,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1643 states. [2023-04-01 04:19:55,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1643 to 1611. [2023-04-01 04:19:55,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1611 states, 1582 states have (on average 1.4943109987357774) internal successors, (2364), 1589 states have internal predecessors, (2364), 11 states have call successors, (11), 11 states have call predecessors, (11), 17 states have return successors, (61), 10 states have call predecessors, (61), 10 states have call successors, (61) [2023-04-01 04:19:55,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1611 states to 1611 states and 2436 transitions. [2023-04-01 04:19:55,521 INFO L78 Accepts]: Start accepts. Automaton has 1611 states and 2436 transitions. Word has length 80 [2023-04-01 04:19:55,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:19:55,521 INFO L495 AbstractCegarLoop]: Abstraction has 1611 states and 2436 transitions. [2023-04-01 04:19:55,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 04:19:55,522 INFO L276 IsEmpty]: Start isEmpty. Operand 1611 states and 2436 transitions. [2023-04-01 04:19:55,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-04-01 04:19:55,527 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:19:55,528 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:19:55,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 04:19:55,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:19:55,733 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:19:55,734 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:19:55,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1057216037, now seen corresponding path program 1 times [2023-04-01 04:19:55,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:19:55,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643774392] [2023-04-01 04:19:55,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:19:55,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:19:55,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:19:55,912 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 04:19:55,913 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:19:55,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643774392] [2023-04-01 04:19:55,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643774392] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:19:55,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:19:55,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:19:55,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773562720] [2023-04-01 04:19:55,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:19:55,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:19:55,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:19:55,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:19:55,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:19:55,915 INFO L87 Difference]: Start difference. First operand 1611 states and 2436 transitions. Second operand has 5 states, 5 states have (on average 21.8) internal successors, (109), 4 states have internal predecessors, (109), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:19:57,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:19:57,121 INFO L93 Difference]: Finished difference Result 4169 states and 6301 transitions. [2023-04-01 04:19:57,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:19:57,125 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 4 states have internal predecessors, (109), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 115 [2023-04-01 04:19:57,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:19:57,135 INFO L225 Difference]: With dead ends: 4169 [2023-04-01 04:19:57,136 INFO L226 Difference]: Without dead ends: 2563 [2023-04-01 04:19:57,143 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 04:19:57,147 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 616 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1301 mSolverCounterSat, 405 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 405 IncrementalHoareTripleChecker+Valid, 1301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:19:57,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [616 Valid, 49 Invalid, 1706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [405 Valid, 1301 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-01 04:19:57,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2563 states. [2023-04-01 04:19:57,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2563 to 2451. [2023-04-01 04:19:57,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2451 states, 2403 states have (on average 1.4215563878485227) internal successors, (3416), 2421 states have internal predecessors, (3416), 15 states have call successors, (15), 15 states have call predecessors, (15), 32 states have return successors, (135), 14 states have call predecessors, (135), 14 states have call successors, (135) [2023-04-01 04:19:57,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2451 states to 2451 states and 3566 transitions. [2023-04-01 04:19:57,218 INFO L78 Accepts]: Start accepts. Automaton has 2451 states and 3566 transitions. Word has length 115 [2023-04-01 04:19:57,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:19:57,219 INFO L495 AbstractCegarLoop]: Abstraction has 2451 states and 3566 transitions. [2023-04-01 04:19:57,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 4 states have internal predecessors, (109), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:19:57,219 INFO L276 IsEmpty]: Start isEmpty. Operand 2451 states and 3566 transitions. [2023-04-01 04:19:57,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-04-01 04:19:57,221 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:19:57,221 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 04:19:57,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 04:19:57,222 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:19:57,222 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:19:57,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1455446098, now seen corresponding path program 1 times [2023-04-01 04:19:57,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:19:57,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755062472] [2023-04-01 04:19:57,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:19:57,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:19:57,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:19:57,415 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 73 proven. 13 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-01 04:19:57,415 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:19:57,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755062472] [2023-04-01 04:19:57,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755062472] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:19:57,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298613385] [2023-04-01 04:19:57,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:19:57,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:19:57,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:19:57,436 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:19:57,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 04:19:57,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:19:57,564 INFO L262 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:19:57,571 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:19:57,664 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 89 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 04:19:57,664 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:19:57,904 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 73 proven. 13 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-01 04:19:57,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298613385] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:19:57,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1857779302] [2023-04-01 04:19:57,927 INFO L159 IcfgInterpreter]: Started Sifa with 77 locations of interest [2023-04-01 04:19:57,927 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:19:57,930 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:19:57,934 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:19:57,934 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:19:58,045 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 46 for LOIs [2023-04-01 04:19:58,125 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2023-04-01 04:20:04,770 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 51