/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain IntervalDomain -i ../sv-benchmarks/c/eca-rers2012/Problem15_label19.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:11:44,617 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:11:44,619 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:11:44,655 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:11:44,656 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:11:44,658 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:11:44,660 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:11:44,662 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:11:44,663 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:11:44,667 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:11:44,668 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:11:44,670 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:11:44,670 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:11:44,671 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:11:44,672 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:11:44,673 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:11:44,674 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:11:44,674 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:11:44,676 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:11:44,679 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:11:44,680 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:11:44,681 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:11:44,681 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:11:44,682 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:11:44,688 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 22:11:44,688 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 22:11:44,689 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 22:11:44,690 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 22:11:44,690 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 22:11:44,691 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 22:11:44,691 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:11:44,691 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:11:44,692 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:11:44,693 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:11:44,693 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:11:44,693 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:11:44,694 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:11:44,694 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:11:44,694 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:11:44,694 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:11:44,695 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:11:44,695 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-03-31 22:11:44,719 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:11:44,719 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:11:44,719 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:11:44,720 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:11:44,720 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:11:44,720 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:11:44,720 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:11:44,721 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:11:44,721 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:11:44,721 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:11:44,721 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:11:44,721 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:11:44,721 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:11:44,722 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:11:44,722 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:11:44,722 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:11:44,722 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:11:44,722 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:11:44,722 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:11:44,722 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:11:44,722 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:11:44,723 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:11:44,723 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:11:44,723 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:11:44,723 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:11:44,723 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:11:44,723 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:11:44,723 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:11:44,723 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:11:44,723 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:11:44,723 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:11:44,724 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:11:44,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:11:44,724 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:11:44,724 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:11:44,724 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:11:44,724 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:11:44,724 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:11:44,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:11:44,724 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:11:44,724 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:11:44,724 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:11:44,917 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:11:44,942 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:11:44,943 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:11:44,944 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:11:44,945 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:11:44,945 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label19.c [2023-03-31 22:11:45,932 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:11:46,196 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:11:46,197 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label19.c [2023-03-31 22:11:46,211 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad1b259bd/ace1accda99f4ef9af3b5a0d0fe12822/FLAG9d2886aa1 [2023-03-31 22:11:46,224 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad1b259bd/ace1accda99f4ef9af3b5a0d0fe12822 [2023-03-31 22:11:46,226 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:11:46,227 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:11:46,229 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:11:46,229 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:11:46,232 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:11:46,233 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:11:46" (1/1) ... [2023-03-31 22:11:46,233 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@432933ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:11:46, skipping insertion in model container [2023-03-31 22:11:46,234 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:11:46" (1/1) ... [2023-03-31 22:11:46,239 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:11:46,289 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:11:46,455 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/Problem15_label19.c[5585,5598] [2023-03-31 22:11:46,771 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:11:46,779 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:11:46,801 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/Problem15_label19.c[5585,5598] [2023-03-31 22:11:46,971 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:11:46,983 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:11:46,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:11:46 WrapperNode [2023-03-31 22:11:46,983 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:11:46,984 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:11:46,984 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:11:46,984 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:11:46,996 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:11:46" (1/1) ... [2023-03-31 22:11:46,996 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:11:46" (1/1) ... [2023-03-31 22:11:47,032 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:11:46" (1/1) ... [2023-03-31 22:11:47,032 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:11:46" (1/1) ... [2023-03-31 22:11:47,105 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:11:46" (1/1) ... [2023-03-31 22:11:47,113 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:11:46" (1/1) ... [2023-03-31 22:11:47,129 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:11:46" (1/1) ... [2023-03-31 22:11:47,136 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:11:46" (1/1) ... [2023-03-31 22:11:47,144 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:11:47,145 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:11:47,146 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:11:47,146 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:11:47,147 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:11:46" (1/1) ... [2023-03-31 22:11:47,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:11:47,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:11:47,172 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-31 22:11:47,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-31 22:11:47,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:11:47,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:11:47,206 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:11:47,206 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 22:11:47,206 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 22:11:47,206 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:11:47,206 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 22:11:47,206 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 22:11:47,206 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:11:47,206 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:11:47,206 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:11:47,206 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:11:47,207 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:11:47,207 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:11:47,207 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:11:47,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:11:47,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:11:47,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:11:47,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:11:47,207 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:11:47,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:11:47,268 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:11:47,270 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:11:49,210 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:11:49,748 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:11:49,748 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 22:11:49,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:11:49 BoogieIcfgContainer [2023-03-31 22:11:49,751 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:11:49,754 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:11:49,754 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:11:49,756 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:11:49,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:11:46" (1/3) ... [2023-03-31 22:11:49,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@629fc49c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:11:49, skipping insertion in model container [2023-03-31 22:11:49,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:11:46" (2/3) ... [2023-03-31 22:11:49,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@629fc49c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:11:49, skipping insertion in model container [2023-03-31 22:11:49,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:11:49" (3/3) ... [2023-03-31 22:11:49,758 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label19.c [2023-03-31 22:11:49,771 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:11:49,772 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:11:49,820 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:11:49,825 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;@5b22c513, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:11:49,826 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:11:49,830 INFO L276 IsEmpty]: Start isEmpty. Operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 22:11:49,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 22:11:49,835 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:11:49,835 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:11:49,836 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:11:49,840 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:11:49,841 INFO L85 PathProgramCache]: Analyzing trace with hash 271519683, now seen corresponding path program 1 times [2023-03-31 22:11:49,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:11:49,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417227000] [2023-03-31 22:11:49,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:11:49,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:11:49,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:11:50,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:11:50,151 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:11:50,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417227000] [2023-03-31 22:11:50,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417227000] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:11:50,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:11:50,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:11:50,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757862369] [2023-03-31 22:11:50,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:11:50,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:11:50,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:11:50,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:11:50,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:11:50,181 INFO L87 Difference]: Start difference. First operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:11:51,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:11:51,558 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2023-03-31 22:11:51,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:11:51,561 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-03-31 22:11:51,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:11:51,571 INFO L225 Difference]: With dead ends: 718 [2023-03-31 22:11:51,572 INFO L226 Difference]: Without dead ends: 471 [2023-03-31 22:11:51,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:11:51,581 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 240 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-03-31 22:11:51,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 48 Invalid, 995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-03-31 22:11:51,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-03-31 22:11:51,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 442. [2023-03-31 22:11:51,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 432 states have (on average 1.9305555555555556) internal successors, (834), 432 states have internal predecessors, (834), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-03-31 22:11:51,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 845 transitions. [2023-03-31 22:11:51,655 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 845 transitions. Word has length 11 [2023-03-31 22:11:51,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:11:51,655 INFO L495 AbstractCegarLoop]: Abstraction has 442 states and 845 transitions. [2023-03-31 22:11:51,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:11:51,656 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 845 transitions. [2023-03-31 22:11:51,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-03-31 22:11:51,657 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:11:51,657 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:11:51,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:11:51,657 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:11:51,657 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:11:51,657 INFO L85 PathProgramCache]: Analyzing trace with hash 759963597, now seen corresponding path program 1 times [2023-03-31 22:11:51,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:11:51,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356629473] [2023-03-31 22:11:51,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:11:51,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:11:51,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:11:51,978 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:11:51,978 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:11:51,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356629473] [2023-03-31 22:11:51,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356629473] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:11:51,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213872943] [2023-03-31 22:11:51,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:11:51,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:11:51,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:11:51,982 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:11:52,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 22:11:52,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:11:52,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 11 conjunts are in the unsatisfiable core [2023-03-31 22:11:52,092 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:11:52,167 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:11:52,168 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 22:11:52,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213872943] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:11:52,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 22:11:52,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2023-03-31 22:11:52,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423930026] [2023-03-31 22:11:52,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:11:52,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:11:52,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:11:52,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:11:52,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-03-31 22:11:52,177 INFO L87 Difference]: Start difference. First operand 442 states and 845 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:11:54,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:11:54,107 INFO L93 Difference]: Finished difference Result 1122 states and 2144 transitions. [2023-03-31 22:11:54,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:11:54,109 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2023-03-31 22:11:54,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:11:54,113 INFO L225 Difference]: With dead ends: 1122 [2023-03-31 22:11:54,113 INFO L226 Difference]: Without dead ends: 685 [2023-03-31 22:11:54,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2023-03-31 22:11:54,114 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 689 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1447 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 689 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 1668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 1447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-03-31 22:11:54,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [689 Valid, 51 Invalid, 1668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 1447 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-03-31 22:11:54,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2023-03-31 22:11:54,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 679. [2023-03-31 22:11:54,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 663 states have (on average 1.7707390648567118) internal successors, (1174), 667 states have internal predecessors, (1174), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2023-03-31 22:11:54,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 1195 transitions. [2023-03-31 22:11:54,139 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 1195 transitions. Word has length 21 [2023-03-31 22:11:54,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:11:54,140 INFO L495 AbstractCegarLoop]: Abstraction has 679 states and 1195 transitions. [2023-03-31 22:11:54,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:11:54,140 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 1195 transitions. [2023-03-31 22:11:54,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-03-31 22:11:54,140 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:11:54,140 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:11:54,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 22:11:54,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:11:54,349 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:11:54,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:11:54,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1136417326, now seen corresponding path program 1 times [2023-03-31 22:11:54,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:11:54,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435643873] [2023-03-31 22:11:54,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:11:54,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:11:54,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:11:54,421 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:11:54,422 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:11:54,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435643873] [2023-03-31 22:11:54,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435643873] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:11:54,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:11:54,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:11:54,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154360783] [2023-03-31 22:11:54,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:11:54,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:11:54,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:11:54,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:11:54,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:11:54,423 INFO L87 Difference]: Start difference. First operand 679 states and 1195 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:11:56,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:11:56,334 INFO L93 Difference]: Finished difference Result 1835 states and 3341 transitions. [2023-03-31 22:11:56,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:11:56,334 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 22 [2023-03-31 22:11:56,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:11:56,339 INFO L225 Difference]: With dead ends: 1835 [2023-03-31 22:11:56,339 INFO L226 Difference]: Without dead ends: 1161 [2023-03-31 22:11:56,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:11:56,341 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 740 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1482 mSolverCounterSat, 304 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 740 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 1786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 304 IncrementalHoareTripleChecker+Valid, 1482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-03-31 22:11:56,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [740 Valid, 70 Invalid, 1786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [304 Valid, 1482 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-03-31 22:11:56,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2023-03-31 22:11:56,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 970. [2023-03-31 22:11:56,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 970 states, 944 states have (on average 1.5317796610169492) internal successors, (1446), 955 states have internal predecessors, (1446), 8 states have call successors, (8), 8 states have call predecessors, (8), 17 states have return successors, (41), 6 states have call predecessors, (41), 7 states have call successors, (41) [2023-03-31 22:11:56,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 970 states to 970 states and 1495 transitions. [2023-03-31 22:11:56,389 INFO L78 Accepts]: Start accepts. Automaton has 970 states and 1495 transitions. Word has length 22 [2023-03-31 22:11:56,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:11:56,389 INFO L495 AbstractCegarLoop]: Abstraction has 970 states and 1495 transitions. [2023-03-31 22:11:56,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:11:56,390 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states and 1495 transitions. [2023-03-31 22:11:56,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-03-31 22:11:56,391 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:11:56,391 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] [2023-03-31 22:11:56,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 22:11:56,391 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:11:56,391 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:11:56,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1402030042, now seen corresponding path program 1 times [2023-03-31 22:11:56,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:11:56,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466196588] [2023-03-31 22:11:56,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:11:56,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:11:56,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:11:56,482 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:11:56,482 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:11:56,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466196588] [2023-03-31 22:11:56,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466196588] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:11:56,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:11:56,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:11:56,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789715589] [2023-03-31 22:11:56,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:11:56,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:11:56,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:11:56,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:11:56,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:11:56,484 INFO L87 Difference]: Start difference. First operand 970 states and 1495 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:11:58,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:11:58,239 INFO L93 Difference]: Finished difference Result 2440 states and 4057 transitions. [2023-03-31 22:11:58,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:11:58,239 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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 26 [2023-03-31 22:11:58,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:11:58,245 INFO L225 Difference]: With dead ends: 2440 [2023-03-31 22:11:58,245 INFO L226 Difference]: Without dead ends: 1700 [2023-03-31 22:11:58,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:11:58,248 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 742 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 1420 mSolverCounterSat, 323 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 323 IncrementalHoareTripleChecker+Valid, 1420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-03-31 22:11:58,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [742 Valid, 49 Invalid, 1743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [323 Valid, 1420 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-03-31 22:11:58,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1700 states. [2023-03-31 22:11:58,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1700 to 1392. [2023-03-31 22:11:58,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1349 states have (on average 1.4292068198665677) internal successors, (1928), 1370 states have internal predecessors, (1928), 11 states have call successors, (11), 11 states have call predecessors, (11), 31 states have return successors, (89), 10 states have call predecessors, (89), 10 states have call successors, (89) [2023-03-31 22:11:58,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 2028 transitions. [2023-03-31 22:11:58,287 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 2028 transitions. Word has length 26 [2023-03-31 22:11:58,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:11:58,287 INFO L495 AbstractCegarLoop]: Abstraction has 1392 states and 2028 transitions. [2023-03-31 22:11:58,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:11:58,288 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 2028 transitions. [2023-03-31 22:11:58,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-03-31 22:11:58,289 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:11:58,289 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] [2023-03-31 22:11:58,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 22:11:58,289 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:11:58,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:11:58,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1712844981, now seen corresponding path program 1 times [2023-03-31 22:11:58,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:11:58,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103998892] [2023-03-31 22:11:58,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:11:58,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:11:58,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:11:58,428 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:11:58,428 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:11:58,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103998892] [2023-03-31 22:11:58,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103998892] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:11:58,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:11:58,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:11:58,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767272450] [2023-03-31 22:11:58,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:11:58,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:11:58,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:11:58,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:11:58,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:11:58,430 INFO L87 Difference]: Start difference. First operand 1392 states and 2028 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 22:11:59,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:11:59,763 INFO L93 Difference]: Finished difference Result 3626 states and 5533 transitions. [2023-03-31 22:11:59,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:11:59,777 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 47 [2023-03-31 22:11:59,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:11:59,786 INFO L225 Difference]: With dead ends: 3626 [2023-03-31 22:11:59,786 INFO L226 Difference]: Without dead ends: 2239 [2023-03-31 22:11:59,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:11:59,792 INFO L413 NwaCegarLoop]: 392 mSDtfsCounter, 247 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 278 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 278 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-03-31 22:11:59,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 407 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [278 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-03-31 22:11:59,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2239 states. [2023-03-31 22:11:59,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2239 to 2032. [2023-03-31 22:11:59,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2032 states, 1975 states have (on average 1.3468354430379748) internal successors, (2660), 2004 states have internal predecessors, (2660), 14 states have call successors, (14), 14 states have call predecessors, (14), 42 states have return successors, (163), 13 states have call predecessors, (163), 13 states have call successors, (163) [2023-03-31 22:11:59,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2032 states to 2032 states and 2837 transitions. [2023-03-31 22:11:59,840 INFO L78 Accepts]: Start accepts. Automaton has 2032 states and 2837 transitions. Word has length 47 [2023-03-31 22:11:59,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:11:59,840 INFO L495 AbstractCegarLoop]: Abstraction has 2032 states and 2837 transitions. [2023-03-31 22:11:59,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 22:11:59,840 INFO L276 IsEmpty]: Start isEmpty. Operand 2032 states and 2837 transitions. [2023-03-31 22:11:59,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-03-31 22:11:59,847 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:11:59,848 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:11:59,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-03-31 22:11:59,848 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:11:59,848 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:11:59,849 INFO L85 PathProgramCache]: Analyzing trace with hash 661154622, now seen corresponding path program 1 times [2023-03-31 22:11:59,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:11:59,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728299476] [2023-03-31 22:11:59,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:11:59,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:11:59,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:12:00,109 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 20 proven. 51 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-03-31 22:12:00,109 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:12:00,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728299476] [2023-03-31 22:12:00,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728299476] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:12:00,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260511242] [2023-03-31 22:12:00,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:12:00,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:12:00,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:12:00,111 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:12:00,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 22:12:00,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:12:00,231 INFO L262 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 8 conjunts are in the unsatisfiable core [2023-03-31 22:12:00,235 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:12:00,342 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 67 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-03-31 22:12:00,342 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:12:00,574 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 22 proven. 49 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-03-31 22:12:00,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260511242] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:12:00,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [283577498] [2023-03-31 22:12:00,593 INFO L159 IcfgInterpreter]: Started Sifa with 43 locations of interest [2023-03-31 22:12:00,593 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:12:00,596 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:12:00,601 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:12:00,602 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:12:00,758 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 51 for LOIs [2023-03-31 22:12:00,895 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 39 [2023-03-31 22:12:01,154 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 5941 conjuctions. This might take some time... [2023-03-31 22:12:01,225 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 106 conjuctions. [2023-03-31 22:12:01,270 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 22 [2023-03-31 22:12:01,881 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 41 for LOIs [2023-03-31 22:12:01,978 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 39 [2023-03-31 22:12:02,213 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 5941 conjuctions. This might take some time... [2023-03-31 22:12:02,367 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 106 conjuctions. [2023-03-31 22:12:12,333 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 22 [2023-03-31 22:12:29,713 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 650628 conjuctions. This might take some time...