/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 EqDomain -i ../sv-benchmarks/c/eca-rers2012/Problem01_label23.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 09:14:30,510 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 09:14:30,511 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 09:14:30,535 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 09:14:30,535 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 09:14:30,535 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 09:14:30,536 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 09:14:30,537 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 09:14:30,538 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 09:14:30,539 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 09:14:30,539 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 09:14:30,540 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 09:14:30,540 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 09:14:30,541 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 09:14:30,541 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 09:14:30,542 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 09:14:30,542 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 09:14:30,543 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 09:14:30,544 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 09:14:30,545 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 09:14:30,546 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 09:14:30,546 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 09:14:30,547 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 09:14:30,547 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 09:14:30,550 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 09:14:30,550 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 09:14:30,550 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 09:14:30,550 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 09:14:30,551 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 09:14:30,551 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 09:14:30,551 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 09:14:30,552 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 09:14:30,552 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 09:14:30,553 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 09:14:30,553 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 09:14:30,553 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 09:14:30,554 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 09:14:30,554 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 09:14:30,554 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 09:14:30,554 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 09:14:30,555 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 09:14:30,569 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 09:14:30,582 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 09:14:30,582 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 09:14:30,582 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 09:14:30,582 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 09:14:30,582 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 09:14:30,582 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 09:14:30,583 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 09:14:30,583 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 09:14:30,583 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 09:14:30,583 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 09:14:30,583 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 09:14:30,583 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 09:14:30,583 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 09:14:30,583 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 09:14:30,583 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 09:14:30,584 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 09:14:30,584 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 09:14:30,584 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 09:14:30,584 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 09:14:30,584 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 09:14:30,584 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 09:14:30,584 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 09:14:30,585 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 09:14:30,585 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 09:14:30,585 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 09:14:30,585 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 09:14:30,585 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 09:14:30,585 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 09:14:30,585 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 09:14:30,585 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 09:14:30,585 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 09:14:30,585 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 09:14:30,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:14:30,586 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 09:14:30,586 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 09:14:30,586 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 09:14:30,586 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 09:14:30,586 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 09:14:30,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 09:14:30,586 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 09:14:30,586 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 09:14:30,586 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 09:14:30,747 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 09:14:30,765 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 09:14:30,768 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 09:14:30,769 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 09:14:30,769 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 09:14:30,770 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem01_label23.c [2023-04-01 09:14:31,696 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 09:14:32,024 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 09:14:32,025 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem01_label23.c [2023-04-01 09:14:32,032 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/243ec2f64/1882e32473e646149e0dc31bdda4a2fb/FLAGb12fa7f8e [2023-04-01 09:14:32,041 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/243ec2f64/1882e32473e646149e0dc31bdda4a2fb [2023-04-01 09:14:32,042 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 09:14:32,043 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 09:14:32,044 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 09:14:32,044 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 09:14:32,046 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 09:14:32,046 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:14:32" (1/1) ... [2023-04-01 09:14:32,047 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ffee55c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:14:32, skipping insertion in model container [2023-04-01 09:14:32,047 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:14:32" (1/1) ... [2023-04-01 09:14:32,051 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 09:14:32,078 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 09:14:32,258 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/Problem01_label23.c[17363,17376] [2023-04-01 09:14:32,278 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:14:32,284 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 09:14:32,362 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/Problem01_label23.c[17363,17376] [2023-04-01 09:14:32,371 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:14:32,403 INFO L208 MainTranslator]: Completed translation [2023-04-01 09:14:32,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:14:32 WrapperNode [2023-04-01 09:14:32,403 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 09:14:32,404 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 09:14:32,405 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 09:14:32,405 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 09:14:32,427 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:14:32" (1/1) ... [2023-04-01 09:14:32,427 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:14:32" (1/1) ... [2023-04-01 09:14:32,439 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:14:32" (1/1) ... [2023-04-01 09:14:32,439 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:14:32" (1/1) ... [2023-04-01 09:14:32,470 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:14:32" (1/1) ... [2023-04-01 09:14:32,488 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:14:32" (1/1) ... [2023-04-01 09:14:32,491 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:14:32" (1/1) ... [2023-04-01 09:14:32,493 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:14:32" (1/1) ... [2023-04-01 09:14:32,497 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 09:14:32,497 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 09:14:32,497 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 09:14:32,497 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 09:14:32,513 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:14:32" (1/1) ... [2023-04-01 09:14:32,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:14:32,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:14:32,536 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 09:14:32,566 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 09:14:32,575 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 09:14:32,575 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 09:14:32,575 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 09:14:32,575 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 09:14:32,576 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 09:14:32,576 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 09:14:32,576 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 09:14:32,576 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 09:14:32,576 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 09:14:32,576 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 09:14:32,576 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 09:14:32,576 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 09:14:32,576 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 09:14:32,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 09:14:32,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 09:14:32,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 09:14:32,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 09:14:32,577 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 09:14:32,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 09:14:32,645 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 09:14:32,647 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 09:14:33,275 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 09:14:33,382 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 09:14:33,382 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 09:14:33,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:14:33 BoogieIcfgContainer [2023-04-01 09:14:33,386 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 09:14:33,388 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 09:14:33,388 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 09:14:33,390 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 09:14:33,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 09:14:32" (1/3) ... [2023-04-01 09:14:33,391 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51fe0be9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:14:33, skipping insertion in model container [2023-04-01 09:14:33,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:14:32" (2/3) ... [2023-04-01 09:14:33,391 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51fe0be9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:14:33, skipping insertion in model container [2023-04-01 09:14:33,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:14:33" (3/3) ... [2023-04-01 09:14:33,394 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem01_label23.c [2023-04-01 09:14:33,405 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 09:14:33,405 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 09:14:33,441 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 09:14:33,446 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;@72228cc8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 09:14:33,446 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 09:14:33,448 INFO L276 IsEmpty]: Start isEmpty. Operand has 86 states, 78 states have (on average 1.8974358974358974) internal successors, (148), 79 states have internal predecessors, (148), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 09:14:33,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-04-01 09:14:33,455 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:14:33,455 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:14:33,455 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:14:33,458 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:14:33,458 INFO L85 PathProgramCache]: Analyzing trace with hash -2062138910, now seen corresponding path program 1 times [2023-04-01 09:14:33,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:14:33,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047076028] [2023-04-01 09:14:33,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:14:33,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:14:33,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:14:33,975 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 09:14:33,975 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:14:33,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047076028] [2023-04-01 09:14:33,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047076028] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:14:33,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:14:33,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 09:14:33,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138213736] [2023-04-01 09:14:33,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:14:33,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 09:14:33,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:14:34,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 09:14:34,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 09:14:34,009 INFO L87 Difference]: Start difference. First operand has 86 states, 78 states have (on average 1.8974358974358974) internal successors, (148), 79 states have internal predecessors, (148), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 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 09:14:34,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:14:34,275 INFO L93 Difference]: Finished difference Result 246 states and 454 transitions. [2023-04-01 09:14:34,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 09:14:34,277 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 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 77 [2023-04-01 09:14:34,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:14:34,283 INFO L225 Difference]: With dead ends: 246 [2023-04-01 09:14:34,283 INFO L226 Difference]: Without dead ends: 157 [2023-04-01 09:14:34,285 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 09:14:34,287 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 20 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 09:14:34,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 42 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 09:14:34,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-04-01 09:14:34,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2023-04-01 09:14:34,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 149 states have (on average 1.8120805369127517) internal successors, (270), 149 states have internal predecessors, (270), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 09:14:34,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 279 transitions. [2023-04-01 09:14:34,318 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 279 transitions. Word has length 77 [2023-04-01 09:14:34,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:14:34,318 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 279 transitions. [2023-04-01 09:14:34,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 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 09:14:34,318 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 279 transitions. [2023-04-01 09:14:34,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-04-01 09:14:34,320 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:14:34,321 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:14:34,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 09:14:34,321 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:14:34,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:14:34,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1470124604, now seen corresponding path program 1 times [2023-04-01 09:14:34,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:14:34,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495112598] [2023-04-01 09:14:34,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:14:34,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:14:34,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:14:34,500 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:14:34,501 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:14:34,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495112598] [2023-04-01 09:14:34,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495112598] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:14:34,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:14:34,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:14:34,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025592536] [2023-04-01 09:14:34,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:14:34,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:14:34,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:14:34,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:14:34,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:14:34,503 INFO L87 Difference]: Start difference. First operand 157 states and 279 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 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 09:14:34,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:14:34,830 INFO L93 Difference]: Finished difference Result 402 states and 725 transitions. [2023-04-01 09:14:34,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 09:14:34,831 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 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 87 [2023-04-01 09:14:34,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:14:34,833 INFO L225 Difference]: With dead ends: 402 [2023-04-01 09:14:34,834 INFO L226 Difference]: Without dead ends: 250 [2023-04-01 09:14:34,834 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 09:14:34,835 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 261 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 09:14:34,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 43 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 09:14:34,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2023-04-01 09:14:34,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 238. [2023-04-01 09:14:34,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 225 states have (on average 1.7244444444444444) internal successors, (388), 228 states have internal predecessors, (388), 5 states have call successors, (5), 5 states have call predecessors, (5), 7 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2023-04-01 09:14:34,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 407 transitions. [2023-04-01 09:14:34,849 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 407 transitions. Word has length 87 [2023-04-01 09:14:34,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:14:34,850 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 407 transitions. [2023-04-01 09:14:34,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 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 09:14:34,850 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 407 transitions. [2023-04-01 09:14:34,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-04-01 09:14:34,852 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:14:34,852 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:14:34,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 09:14:34,853 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:14:34,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:14:34,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1308830510, now seen corresponding path program 1 times [2023-04-01 09:14:34,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:14:34,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990414132] [2023-04-01 09:14:34,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:14:34,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:14:34,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:14:35,056 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:14:35,056 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:14:35,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990414132] [2023-04-01 09:14:35,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990414132] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:14:35,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137936991] [2023-04-01 09:14:35,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:14:35,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:14:35,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:14:35,084 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 09:14:35,169 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 09:14:35,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:14:35,250 INFO L262 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 09:14:35,254 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:14:35,347 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:14:35,347 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 09:14:35,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137936991] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:14:35,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 09:14:35,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-01 09:14:35,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209881382] [2023-04-01 09:14:35,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:14:35,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 09:14:35,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:14:35,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 09:14:35,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 09:14:35,349 INFO L87 Difference]: Start difference. First operand 238 states and 407 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:14:35,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:14:35,623 INFO L93 Difference]: Finished difference Result 700 states and 1242 transitions. [2023-04-01 09:14:35,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 09:14:35,623 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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 88 [2023-04-01 09:14:35,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:14:35,625 INFO L225 Difference]: With dead ends: 700 [2023-04-01 09:14:35,626 INFO L226 Difference]: Without dead ends: 467 [2023-04-01 09:14:35,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 09:14:35,627 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 2 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 09:14:35,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 166 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 09:14:35,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2023-04-01 09:14:35,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 467. [2023-04-01 09:14:35,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 446 states have (on average 1.5269058295964126) internal successors, (681), 451 states have internal predecessors, (681), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (48), 7 states have call predecessors, (48), 7 states have call successors, (48) [2023-04-01 09:14:35,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 737 transitions. [2023-04-01 09:14:35,663 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 737 transitions. Word has length 88 [2023-04-01 09:14:35,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:14:35,663 INFO L495 AbstractCegarLoop]: Abstraction has 467 states and 737 transitions. [2023-04-01 09:14:35,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:14:35,664 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 737 transitions. [2023-04-01 09:14:35,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-04-01 09:14:35,682 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:14:35,682 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:14:35,692 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 09:14:35,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:14:35,888 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:14:35,888 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:14:35,888 INFO L85 PathProgramCache]: Analyzing trace with hash -2050468986, now seen corresponding path program 1 times [2023-04-01 09:14:35,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:14:35,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840570010] [2023-04-01 09:14:35,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:14:35,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:14:35,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:14:36,127 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:14:36,128 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:14:36,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840570010] [2023-04-01 09:14:36,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840570010] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:14:36,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:14:36,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:14:36,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74901931] [2023-04-01 09:14:36,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:14:36,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:14:36,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:14:36,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:14:36,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:14:36,132 INFO L87 Difference]: Start difference. First operand 467 states and 737 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 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 09:14:36,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:14:36,524 INFO L93 Difference]: Finished difference Result 1358 states and 2246 transitions. [2023-04-01 09:14:36,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 09:14:36,524 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 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 94 [2023-04-01 09:14:36,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:14:36,529 INFO L225 Difference]: With dead ends: 1358 [2023-04-01 09:14:36,529 INFO L226 Difference]: Without dead ends: 730 [2023-04-01 09:14:36,533 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 09:14:36,538 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 241 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 09:14:36,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 49 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 09:14:36,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2023-04-01 09:14:36,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 643. [2023-04-01 09:14:36,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 605 states have (on average 1.3305785123966942) internal successors, (805), 623 states have internal predecessors, (805), 10 states have call successors, (10), 10 states have call predecessors, (10), 27 states have return successors, (88), 9 states have call predecessors, (88), 9 states have call successors, (88) [2023-04-01 09:14:36,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 903 transitions. [2023-04-01 09:14:36,582 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 903 transitions. Word has length 94 [2023-04-01 09:14:36,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:14:36,583 INFO L495 AbstractCegarLoop]: Abstraction has 643 states and 903 transitions. [2023-04-01 09:14:36,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 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 09:14:36,584 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 903 transitions. [2023-04-01 09:14:36,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-04-01 09:14:36,590 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:14:36,590 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:14:36,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 09:14:36,591 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:14:36,591 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:14:36,591 INFO L85 PathProgramCache]: Analyzing trace with hash 144090470, now seen corresponding path program 1 times [2023-04-01 09:14:36,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:14:36,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425030840] [2023-04-01 09:14:36,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:14:36,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:14:36,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:14:37,030 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:14:37,031 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:14:37,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425030840] [2023-04-01 09:14:37,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425030840] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:14:37,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:14:37,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:14:37,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518849511] [2023-04-01 09:14:37,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:14:37,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:14:37,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:14:37,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:14:37,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:14:37,041 INFO L87 Difference]: Start difference. First operand 643 states and 903 transitions. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 4 states have internal predecessors, (104), 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 09:14:37,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:14:37,372 INFO L93 Difference]: Finished difference Result 1384 states and 1984 transitions. [2023-04-01 09:14:37,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 09:14:37,372 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 4 states have internal predecessors, (104), 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 110 [2023-04-01 09:14:37,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:14:37,375 INFO L225 Difference]: With dead ends: 1384 [2023-04-01 09:14:37,375 INFO L226 Difference]: Without dead ends: 746 [2023-04-01 09:14:37,376 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 09:14:37,376 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 180 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 09:14:37,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 46 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 09:14:37,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2023-04-01 09:14:37,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 736. [2023-04-01 09:14:37,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 687 states have (on average 1.2954876273653566) internal successors, (890), 714 states have internal predecessors, (890), 11 states have call successors, (11), 11 states have call predecessors, (11), 37 states have return successors, (126), 10 states have call predecessors, (126), 10 states have call successors, (126) [2023-04-01 09:14:37,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 1027 transitions. [2023-04-01 09:14:37,402 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 1027 transitions. Word has length 110 [2023-04-01 09:14:37,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:14:37,402 INFO L495 AbstractCegarLoop]: Abstraction has 736 states and 1027 transitions. [2023-04-01 09:14:37,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 4 states have internal predecessors, (104), 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 09:14:37,402 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 1027 transitions. [2023-04-01 09:14:37,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-04-01 09:14:37,407 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:14:37,408 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:14:37,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 09:14:37,408 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:14:37,409 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:14:37,409 INFO L85 PathProgramCache]: Analyzing trace with hash 338345362, now seen corresponding path program 1 times [2023-04-01 09:14:37,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:14:37,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394947386] [2023-04-01 09:14:37,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:14:37,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:14:37,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:14:37,605 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 67 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:14:37,605 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:14:37,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394947386] [2023-04-01 09:14:37,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394947386] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:14:37,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997381794] [2023-04-01 09:14:37,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:14:37,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:14:37,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:14:37,607 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 09:14:37,661 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 09:14:37,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:14:37,726 INFO L262 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 09:14:37,731 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:14:37,824 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 09:14:37,824 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 09:14:37,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997381794] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:14:37,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 09:14:37,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 09:14:37,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868468984] [2023-04-01 09:14:37,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:14:37,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 09:14:37,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:14:37,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 09:14:37,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 09:14:37,826 INFO L87 Difference]: Start difference. First operand 736 states and 1027 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 09:14:38,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:14:38,051 INFO L93 Difference]: Finished difference Result 2028 states and 2890 transitions. [2023-04-01 09:14:38,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 09:14:38,051 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 135 [2023-04-01 09:14:38,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:14:38,056 INFO L225 Difference]: With dead ends: 2028 [2023-04-01 09:14:38,057 INFO L226 Difference]: Without dead ends: 1297 [2023-04-01 09:14:38,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 09:14:38,058 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 27 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 09:14:38,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 39 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 09:14:38,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1297 states. [2023-04-01 09:14:38,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1297 to 1297. [2023-04-01 09:14:38,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1297 states, 1216 states have (on average 1.2491776315789473) internal successors, (1519), 1261 states have internal predecessors, (1519), 18 states have call successors, (18), 18 states have call predecessors, (18), 62 states have return successors, (221), 17 states have call predecessors, (221), 17 states have call successors, (221) [2023-04-01 09:14:38,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 1758 transitions. [2023-04-01 09:14:38,086 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 1758 transitions. Word has length 135 [2023-04-01 09:14:38,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:14:38,087 INFO L495 AbstractCegarLoop]: Abstraction has 1297 states and 1758 transitions. [2023-04-01 09:14:38,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 09:14:38,087 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 1758 transitions. [2023-04-01 09:14:38,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-04-01 09:14:38,090 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:14:38,090 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:14:38,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 09:14:38,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-04-01 09:14:38,296 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:14:38,296 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:14:38,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1346437762, now seen corresponding path program 1 times [2023-04-01 09:14:38,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:14:38,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250773413] [2023-04-01 09:14:38,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:14:38,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:14:38,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:14:38,578 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 89 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 09:14:38,578 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:14:38,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250773413] [2023-04-01 09:14:38,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250773413] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:14:38,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526603470] [2023-04-01 09:14:38,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:14:38,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:14:38,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:14:38,579 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:14:38,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 09:14:38,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:14:38,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 09:14:38,701 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:14:38,776 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-04-01 09:14:38,777 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 09:14:38,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526603470] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:14:38,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 09:14:38,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2023-04-01 09:14:38,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124899158] [2023-04-01 09:14:38,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:14:38,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 09:14:38,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:14:38,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 09:14:38,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-04-01 09:14:38,778 INFO L87 Difference]: Start difference. First operand 1297 states and 1758 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 09:14:39,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:14:39,023 INFO L93 Difference]: Finished difference Result 2668 states and 3629 transitions. [2023-04-01 09:14:39,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 09:14:39,023 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 158 [2023-04-01 09:14:39,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:14:39,027 INFO L225 Difference]: With dead ends: 2668 [2023-04-01 09:14:39,027 INFO L226 Difference]: Without dead ends: 1376 [2023-04-01 09:14:39,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-04-01 09:14:39,031 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 6 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 09:14:39,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 120 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 09:14:39,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1376 states. [2023-04-01 09:14:39,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1376 to 1376. [2023-04-01 09:14:39,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1376 states, 1291 states have (on average 1.1975213013168087) internal successors, (1546), 1338 states have internal predecessors, (1546), 19 states have call successors, (19), 19 states have call predecessors, (19), 65 states have return successors, (195), 18 states have call predecessors, (195), 18 states have call successors, (195) [2023-04-01 09:14:39,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1376 states to 1376 states and 1760 transitions. [2023-04-01 09:14:39,066 INFO L78 Accepts]: Start accepts. Automaton has 1376 states and 1760 transitions. Word has length 158 [2023-04-01 09:14:39,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:14:39,066 INFO L495 AbstractCegarLoop]: Abstraction has 1376 states and 1760 transitions. [2023-04-01 09:14:39,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 09:14:39,066 INFO L276 IsEmpty]: Start isEmpty. Operand 1376 states and 1760 transitions. [2023-04-01 09:14:39,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2023-04-01 09:14:39,069 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:14:39,070 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:14:39,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 09:14:39,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:14:39,275 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:14:39,275 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:14:39,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1435749270, now seen corresponding path program 1 times [2023-04-01 09:14:39,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:14:39,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859833214] [2023-04-01 09:14:39,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:14:39,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:14:39,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:14:39,635 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 111 proven. 62 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-04-01 09:14:39,636 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:14:39,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859833214] [2023-04-01 09:14:39,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859833214] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:14:39,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464594689] [2023-04-01 09:14:39,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:14:39,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:14:39,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:14:39,637 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:14:39,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 09:14:39,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:14:39,745 INFO L262 TraceCheckSpWp]: Trace formula consists of 616 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 09:14:39,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:14:39,859 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 131 proven. 22 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-04-01 09:14:39,859 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:14:40,036 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 151 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-04-01 09:14:40,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464594689] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:14:40,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [842673013] [2023-04-01 09:14:40,069 INFO L159 IcfgInterpreter]: Started Sifa with 81 locations of interest [2023-04-01 09:14:40,069 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:14:40,072 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:14:40,074 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:14:40,075 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:14:40,383 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 104 for LOIs [2023-04-01 09:15:04,834 WARN L223 SmtUtils]: Spent 19.79s on a formula simplification. DAG size of input: 1232 DAG size of output: 1230 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)