/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_label26.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:27:04,619 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:27:04,621 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:27:04,661 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:27:04,662 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:27:04,664 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:27:04,669 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:27:04,671 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:27:04,673 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:27:04,678 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:27:04,679 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:27:04,680 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:27:04,681 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:27:04,683 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:27:04,684 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:27:04,685 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:27:04,686 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:27:04,686 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:27:04,688 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:27:04,692 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:27:04,693 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:27:04,694 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:27:04,695 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:27:04,696 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:27:04,704 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:27:04,704 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:27:04,704 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:27:04,706 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:27:04,706 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:27:04,707 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:27:04,707 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:27:04,708 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:27:04,709 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:27:04,709 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:27:04,710 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:27:04,710 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:27:04,711 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:27:04,711 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:27:04,711 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:27:04,712 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:27:04,712 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:27:04,714 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 04:27:04,742 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:27:04,743 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:27:04,743 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:27:04,743 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:27:04,744 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:27:04,744 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:27:04,744 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:27:04,744 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:27:04,744 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:27:04,745 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:27:04,745 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:27:04,745 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:27:04,746 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:27:04,746 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:27:04,746 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:27:04,746 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:27:04,746 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:27:04,746 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:27:04,747 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:27:04,747 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:27:04,747 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:27:04,747 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:27:04,747 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:27:04,747 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:27:04,747 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:27:04,748 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:27:04,748 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:27:04,748 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:27:04,748 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:27:04,748 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:27:04,748 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:27:04,749 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:27:04,749 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:27:04,749 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:27:04,749 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:27:04,749 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:27:04,749 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:27:04,749 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:27:04,749 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:27:04,750 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:27:04,750 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:27:04,750 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:27:04,975 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:27:04,996 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:27:04,998 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:27:04,999 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:27:05,000 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:27:05,001 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem18_label26.c [2023-04-01 04:27:06,214 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:27:06,616 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:27:06,617 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label26.c [2023-04-01 04:27:06,646 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff0cb605c/66d589b6837b49eb919db314c2a83787/FLAGbd5013335 [2023-04-01 04:27:06,666 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff0cb605c/66d589b6837b49eb919db314c2a83787 [2023-04-01 04:27:06,669 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:27:06,670 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:27:06,673 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:27:06,673 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:27:06,677 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:27:06,677 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:27:06" (1/1) ... [2023-04-01 04:27:06,680 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b9f61e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:27:06, skipping insertion in model container [2023-04-01 04:27:06,681 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:27:06" (1/1) ... [2023-04-01 04:27:06,687 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:27:06,777 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:27:07,015 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_label26.c[6456,6469] [2023-04-01 04:27:07,528 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:27:07,539 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:27:07,570 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_label26.c[6456,6469] [2023-04-01 04:27:07,824 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:27:07,844 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:27:07,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:27:07 WrapperNode [2023-04-01 04:27:07,844 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:27:07,846 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:27:07,846 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:27:07,846 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:27:07,856 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:27:07" (1/1) ... [2023-04-01 04:27:07,856 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:27:07" (1/1) ... [2023-04-01 04:27:07,900 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:27:07" (1/1) ... [2023-04-01 04:27:07,900 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:27:07" (1/1) ... [2023-04-01 04:27:08,007 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:27:07" (1/1) ... [2023-04-01 04:27:08,030 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:27:07" (1/1) ... [2023-04-01 04:27:08,063 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:27:07" (1/1) ... [2023-04-01 04:27:08,075 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:27:07" (1/1) ... [2023-04-01 04:27:08,101 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:27:08,102 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:27:08,102 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:27:08,102 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:27:08,104 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:27:07" (1/1) ... [2023-04-01 04:27:08,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:27:08,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:27:08,171 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 04:27:08,182 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 04:27:08,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:27:08,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:27:08,205 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:27:08,205 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:27:08,206 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:27:08,206 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 04:27:08,206 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:27:08,206 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:27:08,206 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:27:08,206 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 04:27:08,206 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:27:08,206 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:27:08,206 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:27:08,206 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:27:08,206 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:27:08,207 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:27:08,207 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:27:08,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:27:08,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:27:08,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:27:08,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:27:08,207 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:27:08,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:27:08,267 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:27:08,269 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:27:11,241 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:27:18,408 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:27:18,408 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:27:18,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:27:18 BoogieIcfgContainer [2023-04-01 04:27:18,412 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:27:18,413 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:27:18,414 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:27:18,417 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:27:18,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:27:06" (1/3) ... [2023-04-01 04:27:18,418 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@644de98b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:27:18, skipping insertion in model container [2023-04-01 04:27:18,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:27:07" (2/3) ... [2023-04-01 04:27:18,418 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@644de98b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:27:18, skipping insertion in model container [2023-04-01 04:27:18,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:27:18" (3/3) ... [2023-04-01 04:27:18,419 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label26.c [2023-04-01 04:27:18,439 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:27:18,439 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:27:18,513 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:27:18,519 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;@455f0522, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:27:18,520 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:27:18,528 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 04:27:18,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:27:18,534 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:27:18,535 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:27:18,536 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:27:18,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:27:18,541 INFO L85 PathProgramCache]: Analyzing trace with hash 314329699, now seen corresponding path program 1 times [2023-04-01 04:27:18,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:27:18,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056215519] [2023-04-01 04:27:18,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:27:18,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:27:18,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:27:18,881 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 04:27:18,882 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:27:18,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056215519] [2023-04-01 04:27:18,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056215519] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:27:18,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:27:18,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:27:18,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323291669] [2023-04-01 04:27:18,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:27:18,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:27:18,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:27:18,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:27:18,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:27:18,918 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 04:27:21,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:27:21,242 INFO L93 Difference]: Finished difference Result 1393 states and 2727 transitions. [2023-04-01 04:27:21,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:27:21,246 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 04:27:21,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:27:21,264 INFO L225 Difference]: With dead ends: 1393 [2023-04-01 04:27:21,264 INFO L226 Difference]: Without dead ends: 921 [2023-04-01 04:27:21,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:27:21,274 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 480 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 1361 mSolverCounterSat, 753 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 2114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 753 IncrementalHoareTripleChecker+Valid, 1361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-04-01 04:27:21,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [480 Valid, 68 Invalid, 2114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [753 Valid, 1361 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-04-01 04:27:21,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2023-04-01 04:27:21,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 899. [2023-04-01 04:27:21,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 885 states have (on average 1.9457627118644067) internal successors, (1722), 885 states have internal predecessors, (1722), 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 04:27:21,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1739 transitions. [2023-04-01 04:27:21,359 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1739 transitions. Word has length 11 [2023-04-01 04:27:21,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:27:21,360 INFO L495 AbstractCegarLoop]: Abstraction has 899 states and 1739 transitions. [2023-04-01 04:27:21,360 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 04:27:21,360 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1739 transitions. [2023-04-01 04:27:21,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 04:27:21,362 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:27:21,362 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 04:27:21,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:27:21,362 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:27:21,363 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:27:21,363 INFO L85 PathProgramCache]: Analyzing trace with hash 992004905, now seen corresponding path program 1 times [2023-04-01 04:27:21,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:27:21,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142191646] [2023-04-01 04:27:21,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:27:21,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:27:21,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:27:21,632 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 04:27:21,633 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:27:21,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142191646] [2023-04-01 04:27:21,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142191646] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:27:21,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:27:21,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:27:21,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393398439] [2023-04-01 04:27:21,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:27:21,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:27:21,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:27:21,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:27:21,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:27:21,637 INFO L87 Difference]: Start difference. First operand 899 states and 1739 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 04:27:24,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:27:24,560 INFO L93 Difference]: Finished difference Result 2721 states and 5303 transitions. [2023-04-01 04:27:24,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:27:24,561 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 04:27:24,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:27:24,573 INFO L225 Difference]: With dead ends: 2721 [2023-04-01 04:27:24,574 INFO L226 Difference]: Without dead ends: 1827 [2023-04-01 04:27:24,577 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 04:27:24,579 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1716 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 2398 mSolverCounterSat, 910 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1716 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 3308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 910 IncrementalHoareTripleChecker+Valid, 2398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-04-01 04:27:24,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1716 Valid, 71 Invalid, 3308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [910 Valid, 2398 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-04-01 04:27:24,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1827 states. [2023-04-01 04:27:24,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1827 to 1807. [2023-04-01 04:27:24,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1807 states, 1777 states have (on average 1.727068092290377) internal successors, (3069), 1781 states have internal predecessors, (3069), 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 04:27:24,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1807 states to 1807 states and 3130 transitions. [2023-04-01 04:27:24,656 INFO L78 Accepts]: Start accepts. Automaton has 1807 states and 3130 transitions. Word has length 25 [2023-04-01 04:27:24,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:27:24,657 INFO L495 AbstractCegarLoop]: Abstraction has 1807 states and 3130 transitions. [2023-04-01 04:27:24,657 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 04:27:24,657 INFO L276 IsEmpty]: Start isEmpty. Operand 1807 states and 3130 transitions. [2023-04-01 04:27:24,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-01 04:27:24,658 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:27:24,659 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] [2023-04-01 04:27:24,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:27:24,659 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:27:24,659 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:27:24,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1536362218, now seen corresponding path program 1 times [2023-04-01 04:27:24,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:27:24,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130963768] [2023-04-01 04:27:24,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:27:24,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:27:24,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:27:24,906 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 04:27:24,907 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:27:24,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130963768] [2023-04-01 04:27:24,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130963768] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:27:24,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:27:24,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:27:24,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671561430] [2023-04-01 04:27:24,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:27:24,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:27:24,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:27:24,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:27:24,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:27:24,912 INFO L87 Difference]: Start difference. First operand 1807 states and 3130 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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 04:27:29,639 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-01 04:27:31,744 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-01 04:27:31,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:27:31,814 INFO L93 Difference]: Finished difference Result 5507 states and 9693 transitions. [2023-04-01 04:27:31,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:27:31,818 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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 28 [2023-04-01 04:27:31,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:27:31,839 INFO L225 Difference]: With dead ends: 5507 [2023-04-01 04:27:31,839 INFO L226 Difference]: Without dead ends: 3705 [2023-04-01 04:27:31,845 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 04:27:31,847 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 1549 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 2645 mSolverCounterSat, 763 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1549 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 3410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 763 IncrementalHoareTripleChecker+Valid, 2645 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2023-04-01 04:27:31,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1549 Valid, 87 Invalid, 3410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [763 Valid, 2645 Invalid, 2 Unknown, 0 Unchecked, 6.7s Time] [2023-04-01 04:27:31,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3705 states. [2023-04-01 04:27:31,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3705 to 3653. [2023-04-01 04:27:31,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3653 states, 3577 states have (on average 1.4788929270338271) internal successors, (5290), 3599 states have internal predecessors, (5290), 19 states have call successors, (19), 19 states have call predecessors, (19), 56 states have return successors, (228), 34 states have call predecessors, (228), 18 states have call successors, (228) [2023-04-01 04:27:31,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3653 states to 3653 states and 5537 transitions. [2023-04-01 04:27:31,980 INFO L78 Accepts]: Start accepts. Automaton has 3653 states and 5537 transitions. Word has length 28 [2023-04-01 04:27:31,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:27:31,980 INFO L495 AbstractCegarLoop]: Abstraction has 3653 states and 5537 transitions. [2023-04-01 04:27:31,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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 04:27:31,981 INFO L276 IsEmpty]: Start isEmpty. Operand 3653 states and 5537 transitions. [2023-04-01 04:27:31,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-01 04:27:31,982 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:27:31,983 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:27:31,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:27:31,983 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:27:31,983 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:27:31,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1238073828, now seen corresponding path program 1 times [2023-04-01 04:27:31,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:27:31,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636695553] [2023-04-01 04:27:31,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:27:31,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:27:32,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:27:32,183 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 04:27:32,183 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:27:32,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636695553] [2023-04-01 04:27:32,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636695553] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:27:32,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458632336] [2023-04-01 04:27:32,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:27:32,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:27:32,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:27:32,191 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 04:27:32,197 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 04:27:32,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:27:32,301 INFO L262 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 04:27:32,306 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:27:32,380 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 04:27:32,380 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 04:27:32,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458632336] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:27:32,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 04:27:32,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 04:27:32,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72285822] [2023-04-01 04:27:32,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:27:32,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:27:32,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:27:32,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:27:32,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:27:32,404 INFO L87 Difference]: Start difference. First operand 3653 states and 5537 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 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 04:27:34,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:27:34,770 INFO L93 Difference]: Finished difference Result 9191 states and 13934 transitions. [2023-04-01 04:27:34,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:27:34,773 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 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 38 [2023-04-01 04:27:34,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:27:34,802 INFO L225 Difference]: With dead ends: 9191 [2023-04-01 04:27:34,803 INFO L226 Difference]: Without dead ends: 5543 [2023-04-01 04:27:34,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-04-01 04:27:34,819 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 1602 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 2358 mSolverCounterSat, 822 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1602 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 3180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 822 IncrementalHoareTripleChecker+Valid, 2358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-04-01 04:27:34,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1602 Valid, 59 Invalid, 3180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [822 Valid, 2358 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-04-01 04:27:34,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5543 states. [2023-04-01 04:27:34,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5543 to 5485. [2023-04-01 04:27:34,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5485 states, 5359 states have (on average 1.3558499720097033) internal successors, (7266), 5402 states have internal predecessors, (7266), 27 states have call successors, (27), 27 states have call predecessors, (27), 98 states have return successors, (488), 55 states have call predecessors, (488), 26 states have call successors, (488) [2023-04-01 04:27:34,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5485 states to 5485 states and 7781 transitions. [2023-04-01 04:27:34,994 INFO L78 Accepts]: Start accepts. Automaton has 5485 states and 7781 transitions. Word has length 38 [2023-04-01 04:27:34,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:27:34,994 INFO L495 AbstractCegarLoop]: Abstraction has 5485 states and 7781 transitions. [2023-04-01 04:27:34,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 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 04:27:34,994 INFO L276 IsEmpty]: Start isEmpty. Operand 5485 states and 7781 transitions. [2023-04-01 04:27:35,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-04-01 04:27:35,003 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:27:35,003 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:27:35,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 04:27:35,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:27:35,210 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:27:35,210 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:27:35,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1990320716, now seen corresponding path program 1 times [2023-04-01 04:27:35,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:27:35,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110706448] [2023-04-01 04:27:35,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:27:35,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:27:35,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:27:35,439 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:27:35,439 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:27:35,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110706448] [2023-04-01 04:27:35,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110706448] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:27:35,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429267790] [2023-04-01 04:27:35,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:27:35,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:27:35,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:27:35,449 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 04:27:35,452 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 04:27:35,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:27:35,563 INFO L262 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:27:35,567 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:27:35,628 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:27:35,628 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:27:35,737 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:27:35,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429267790] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:27:35,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1464361637] [2023-04-01 04:27:35,762 INFO L159 IcfgInterpreter]: Started Sifa with 70 locations of interest [2023-04-01 04:27:35,762 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:27:35,765 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:27:35,770 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:27:35,770 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:27:35,903 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 44 for LOIs [2023-04-01 04:27:36,079 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 56