/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/Problem15_label01.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 10:15:11,511 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 10:15:11,513 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 10:15:11,537 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 10:15:11,537 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 10:15:11,538 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 10:15:11,540 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 10:15:11,546 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 10:15:11,547 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 10:15:11,548 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 10:15:11,549 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 10:15:11,549 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 10:15:11,550 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 10:15:11,551 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 10:15:11,551 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 10:15:11,552 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 10:15:11,553 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 10:15:11,554 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 10:15:11,555 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 10:15:11,557 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 10:15:11,558 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 10:15:11,566 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 10:15:11,568 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 10:15:11,569 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 10:15:11,572 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 10:15:11,572 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 10:15:11,572 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 10:15:11,573 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 10:15:11,573 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 10:15:11,574 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 10:15:11,574 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 10:15:11,575 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 10:15:11,575 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 10:15:11,576 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 10:15:11,577 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 10:15:11,577 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 10:15:11,578 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 10:15:11,578 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 10:15:11,578 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 10:15:11,579 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 10:15:11,579 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 10:15:11,580 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 10:15:11,604 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 10:15:11,604 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 10:15:11,605 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 10:15:11,605 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 10:15:11,605 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 10:15:11,605 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 10:15:11,605 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 10:15:11,606 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 10:15:11,606 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 10:15:11,606 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 10:15:11,606 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 10:15:11,606 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 10:15:11,606 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 10:15:11,606 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 10:15:11,606 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 10:15:11,607 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 10:15:11,607 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 10:15:11,607 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 10:15:11,607 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 10:15:11,607 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 10:15:11,607 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 10:15:11,608 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 10:15:11,608 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 10:15:11,608 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 10:15:11,608 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 10:15:11,608 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 10:15:11,608 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 10:15:11,608 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 10:15:11,611 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 10:15:11,611 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 10:15:11,611 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 10:15:11,612 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 10:15:11,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:15:11,612 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 10:15:11,612 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 10:15:11,612 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 10:15:11,613 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 10:15:11,613 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 10:15:11,613 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 10:15:11,613 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 10:15:11,613 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 10:15:11,613 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 10:15:11,855 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 10:15:11,883 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 10:15:11,885 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 10:15:11,886 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 10:15:11,887 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 10:15:11,888 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label01.c [2023-04-01 10:15:13,047 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 10:15:13,368 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 10:15:13,369 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label01.c [2023-04-01 10:15:13,397 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd6534215/a50cbd3049f44daaaa7e5c282cab35b5/FLAG12ce395bd [2023-04-01 10:15:13,416 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd6534215/a50cbd3049f44daaaa7e5c282cab35b5 [2023-04-01 10:15:13,419 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 10:15:13,421 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 10:15:13,423 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 10:15:13,423 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 10:15:13,426 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 10:15:13,426 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:15:13" (1/1) ... [2023-04-01 10:15:13,428 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78fd32d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:15:13, skipping insertion in model container [2023-04-01 10:15:13,428 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:15:13" (1/1) ... [2023-04-01 10:15:13,435 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 10:15:13,500 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 10:15:13,730 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_label01.c[5470,5483] [2023-04-01 10:15:14,106 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:15:14,117 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 10:15:14,148 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_label01.c[5470,5483] [2023-04-01 10:15:14,328 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:15:14,345 INFO L208 MainTranslator]: Completed translation [2023-04-01 10:15:14,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:15:14 WrapperNode [2023-04-01 10:15:14,346 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 10:15:14,347 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 10:15:14,347 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 10:15:14,347 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 10:15:14,358 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:15:14" (1/1) ... [2023-04-01 10:15:14,358 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:15:14" (1/1) ... [2023-04-01 10:15:14,404 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:15:14" (1/1) ... [2023-04-01 10:15:14,404 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:15:14" (1/1) ... [2023-04-01 10:15:14,486 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:15:14" (1/1) ... [2023-04-01 10:15:14,506 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:15:14" (1/1) ... [2023-04-01 10:15:14,525 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:15:14" (1/1) ... [2023-04-01 10:15:14,535 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:15:14" (1/1) ... [2023-04-01 10:15:14,547 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 10:15:14,549 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 10:15:14,549 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 10:15:14,549 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 10:15:14,550 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:15:14" (1/1) ... [2023-04-01 10:15:14,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:15:14,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:15:14,579 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 10:15:14,599 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 10:15:14,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 10:15:14,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 10:15:14,615 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 10:15:14,615 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 10:15:14,615 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 10:15:14,615 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 10:15:14,615 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 10:15:14,615 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 10:15:14,616 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 10:15:14,616 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 10:15:14,616 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 10:15:14,616 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 10:15:14,616 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 10:15:14,616 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 10:15:14,616 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 10:15:14,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 10:15:14,617 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 10:15:14,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 10:15:14,617 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 10:15:14,617 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 10:15:14,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 10:15:14,700 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 10:15:14,702 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 10:15:16,985 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 10:15:17,717 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 10:15:17,718 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 10:15:17,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:15:17 BoogieIcfgContainer [2023-04-01 10:15:17,721 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 10:15:17,723 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 10:15:17,723 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 10:15:17,726 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 10:15:17,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:15:13" (1/3) ... [2023-04-01 10:15:17,727 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dfb713e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:15:17, skipping insertion in model container [2023-04-01 10:15:17,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:15:14" (2/3) ... [2023-04-01 10:15:17,727 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dfb713e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:15:17, skipping insertion in model container [2023-04-01 10:15:17,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:15:17" (3/3) ... [2023-04-01 10:15:17,728 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label01.c [2023-04-01 10:15:17,745 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 10:15:17,745 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 10:15:17,792 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 10:15:17,799 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;@c8b0c02, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 10:15:17,800 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 10:15:17,806 INFO L276 IsEmpty]: Start isEmpty. Operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 10:15:17,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 10:15:17,812 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:15:17,813 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:15:17,813 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:15:17,818 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:15:17,818 INFO L85 PathProgramCache]: Analyzing trace with hash 271519427, now seen corresponding path program 1 times [2023-04-01 10:15:17,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:15:17,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998505760] [2023-04-01 10:15:17,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:15:17,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:15:17,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:15:18,236 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 10:15:18,237 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:15:18,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998505760] [2023-04-01 10:15:18,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998505760] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:15:18,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:15:18,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:15:18,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418719315] [2023-04-01 10:15:18,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:15:18,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:15:18,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:15:18,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:15:18,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:15:18,281 INFO L87 Difference]: Start difference. First operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:15:19,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:15:19,941 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2023-04-01 10:15:19,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:15:19,943 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 10:15:19,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:15:19,957 INFO L225 Difference]: With dead ends: 718 [2023-04-01 10:15:19,957 INFO L226 Difference]: Without dead ends: 471 [2023-04-01 10:15:19,962 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 10:15:19,965 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 238 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-04-01 10:15:19,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 181 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-04-01 10:15:19,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-04-01 10:15:20,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 469. [2023-04-01 10:15:20,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 459 states have (on average 1.5969498910675382) internal successors, (733), 459 states have internal predecessors, (733), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-01 10:15:20,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 744 transitions. [2023-04-01 10:15:20,024 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 744 transitions. Word has length 11 [2023-04-01 10:15:20,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:15:20,024 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 744 transitions. [2023-04-01 10:15:20,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:15:20,025 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 744 transitions. [2023-04-01 10:15:20,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 10:15:20,026 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:15:20,026 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:15:20,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 10:15:20,026 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:15:20,027 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:15:20,027 INFO L85 PathProgramCache]: Analyzing trace with hash -272698411, now seen corresponding path program 1 times [2023-04-01 10:15:20,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:15:20,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098347485] [2023-04-01 10:15:20,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:15:20,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:15:20,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:15:20,375 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:15:20,376 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:15:20,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098347485] [2023-04-01 10:15:20,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098347485] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:15:20,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963122869] [2023-04-01 10:15:20,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:15:20,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:15:20,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:15:20,381 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 10:15:20,408 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 10:15:20,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:15:20,483 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 10:15:20,488 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:15:20,646 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:15:20,646 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 10:15:20,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963122869] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:15:20,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 10:15:20,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 8 [2023-04-01 10:15:20,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797176569] [2023-04-01 10:15:20,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:15:20,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:15:20,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:15:20,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:15:20,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:15:20,650 INFO L87 Difference]: Start difference. First operand 469 states and 744 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:15:22,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:15:22,678 INFO L93 Difference]: Finished difference Result 1171 states and 1783 transitions. [2023-04-01 10:15:22,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 10:15:22,681 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2023-04-01 10:15:22,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:15:22,685 INFO L225 Difference]: With dead ends: 1171 [2023-04-01 10:15:22,685 INFO L226 Difference]: Without dead ends: 707 [2023-04-01 10:15:22,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-04-01 10:15:22,688 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 683 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 1445 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 683 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-04-01 10:15:22,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [683 Valid, 48 Invalid, 1588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1445 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-04-01 10:15:22,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2023-04-01 10:15:22,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 700. [2023-04-01 10:15:22,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 686 states have (on average 1.4431486880466473) internal successors, (990), 689 states have internal predecessors, (990), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2023-04-01 10:15:22,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 1009 transitions. [2023-04-01 10:15:22,727 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 1009 transitions. Word has length 21 [2023-04-01 10:15:22,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:15:22,727 INFO L495 AbstractCegarLoop]: Abstraction has 700 states and 1009 transitions. [2023-04-01 10:15:22,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:15:22,727 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 1009 transitions. [2023-04-01 10:15:22,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-01 10:15:22,728 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:15:22,728 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] [2023-04-01 10:15:22,737 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 10:15:22,933 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 [2023-04-01 10:15:22,934 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:15:22,934 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:15:22,934 INFO L85 PathProgramCache]: Analyzing trace with hash 656394014, now seen corresponding path program 1 times [2023-04-01 10:15:22,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:15:22,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272091355] [2023-04-01 10:15:22,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:15:22,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:15:22,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:15:23,026 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:15:23,026 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:15:23,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272091355] [2023-04-01 10:15:23,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272091355] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:15:23,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:15:23,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:15:23,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556749354] [2023-04-01 10:15:23,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:15:23,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:15:23,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:15:23,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:15:23,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:15:23,032 INFO L87 Difference]: Start difference. First operand 700 states and 1009 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) [2023-04-01 10:15:25,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:15:25,509 INFO L93 Difference]: Finished difference Result 1662 states and 2557 transitions. [2023-04-01 10:15:25,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 10:15:25,515 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 [2023-04-01 10:15:25,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:15:25,521 INFO L225 Difference]: With dead ends: 1662 [2023-04-01 10:15:25,521 INFO L226 Difference]: Without dead ends: 1192 [2023-04-01 10:15:25,523 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 10:15:25,524 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 742 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 1420 mSolverCounterSat, 323 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s 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, 2.4s IncrementalHoareTripleChecker+Time [2023-04-01 10:15:25,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [742 Valid, 49 Invalid, 1743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [323 Valid, 1420 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-04-01 10:15:25,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1192 states. [2023-04-01 10:15:25,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1192 to 943. [2023-04-01 10:15:25,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 943 states, 920 states have (on average 1.3706521739130435) internal successors, (1261), 927 states have internal predecessors, (1261), 8 states have call successors, (8), 8 states have call predecessors, (8), 14 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) [2023-04-01 10:15:25,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 1295 transitions. [2023-04-01 10:15:25,559 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 1295 transitions. Word has length 26 [2023-04-01 10:15:25,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:15:25,560 INFO L495 AbstractCegarLoop]: Abstraction has 943 states and 1295 transitions. [2023-04-01 10:15:25,560 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) [2023-04-01 10:15:25,560 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 1295 transitions. [2023-04-01 10:15:25,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-01 10:15:25,561 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:15:25,561 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] [2023-04-01 10:15:25,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 10:15:25,562 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:15:25,562 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:15:25,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1890375341, now seen corresponding path program 1 times [2023-04-01 10:15:25,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:15:25,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116545855] [2023-04-01 10:15:25,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:15:25,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:15:25,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:15:25,741 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:15:25,742 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:15:25,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116545855] [2023-04-01 10:15:25,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116545855] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:15:25,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71432669] [2023-04-01 10:15:25,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:15:25,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:15:25,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:15:25,744 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 10:15:25,773 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 10:15:25,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:15:25,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-01 10:15:25,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:15:25,940 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:15:25,941 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:15:26,135 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:15:26,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71432669] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 10:15:26,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 10:15:26,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 11 [2023-04-01 10:15:26,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808235409] [2023-04-01 10:15:26,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:15:26,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 10:15:26,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:15:26,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 10:15:26,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2023-04-01 10:15:26,142 INFO L87 Difference]: Start difference. First operand 943 states and 1295 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 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 10:15:29,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:15:29,688 INFO L93 Difference]: Finished difference Result 3295 states and 4774 transitions. [2023-04-01 10:15:29,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 10:15:29,690 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 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 47 [2023-04-01 10:15:29,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:15:29,701 INFO L225 Difference]: With dead ends: 3295 [2023-04-01 10:15:29,701 INFO L226 Difference]: Without dead ends: 2357 [2023-04-01 10:15:29,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2023-04-01 10:15:29,705 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 1068 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 1667 mSolverCounterSat, 663 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1068 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 2330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 663 IncrementalHoareTripleChecker+Valid, 1667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-04-01 10:15:29,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1068 Valid, 37 Invalid, 2330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [663 Valid, 1667 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-04-01 10:15:29,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2357 states. [2023-04-01 10:15:29,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2357 to 2129. [2023-04-01 10:15:29,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2129 states, 2080 states have (on average 1.3918269230769231) internal successors, (2895), 2101 states have internal predecessors, (2895), 14 states have call successors, (14), 14 states have call predecessors, (14), 34 states have return successors, (144), 13 states have call predecessors, (144), 13 states have call successors, (144) [2023-04-01 10:15:29,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2129 states to 2129 states and 3053 transitions. [2023-04-01 10:15:29,769 INFO L78 Accepts]: Start accepts. Automaton has 2129 states and 3053 transitions. Word has length 47 [2023-04-01 10:15:29,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:15:29,770 INFO L495 AbstractCegarLoop]: Abstraction has 2129 states and 3053 transitions. [2023-04-01 10:15:29,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 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 10:15:29,770 INFO L276 IsEmpty]: Start isEmpty. Operand 2129 states and 3053 transitions. [2023-04-01 10:15:29,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-01 10:15:29,771 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:15:29,772 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:15:29,783 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 10:15:29,978 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,SelfDestructingSolverStorable3 [2023-04-01 10:15:29,978 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:15:29,979 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:15:29,979 INFO L85 PathProgramCache]: Analyzing trace with hash -327410286, now seen corresponding path program 1 times [2023-04-01 10:15:29,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:15:29,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937609925] [2023-04-01 10:15:29,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:15:29,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:15:30,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:15:30,297 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 10:15:30,298 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:15:30,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937609925] [2023-04-01 10:15:30,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937609925] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:15:30,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876004491] [2023-04-01 10:15:30,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:15:30,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:15:30,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:15:30,300 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 10:15:30,303 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 10:15:30,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:15:30,401 INFO L262 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 10:15:30,403 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:15:30,567 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 10:15:30,568 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:15:30,767 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 10:15:30,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876004491] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 10:15:30,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 10:15:30,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2023-04-01 10:15:30,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100328292] [2023-04-01 10:15:30,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:15:30,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:15:30,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:15:30,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:15:30,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:15:30,770 INFO L87 Difference]: Start difference. First operand 2129 states and 3053 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 10:15:32,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:15:32,569 INFO L93 Difference]: Finished difference Result 5558 states and 8291 transitions. [2023-04-01 10:15:32,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 10:15:32,573 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 60 [2023-04-01 10:15:32,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:15:32,590 INFO L225 Difference]: With dead ends: 5558 [2023-04-01 10:15:32,590 INFO L226 Difference]: Without dead ends: 3434 [2023-04-01 10:15:32,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 119 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-04-01 10:15:32,597 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 511 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 503 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 503 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-04-01 10:15:32,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [511 Valid, 43 Invalid, 1521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [503 Valid, 1018 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-04-01 10:15:32,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3434 states. [2023-04-01 10:15:32,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3434 to 3227. [2023-04-01 10:15:32,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3227 states, 3137 states have (on average 1.3076187440229519) internal successors, (4102), 3185 states have internal predecessors, (4102), 21 states have call successors, (21), 21 states have call predecessors, (21), 68 states have return successors, (273), 20 states have call predecessors, (273), 20 states have call successors, (273) [2023-04-01 10:15:32,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3227 states to 3227 states and 4396 transitions. [2023-04-01 10:15:32,684 INFO L78 Accepts]: Start accepts. Automaton has 3227 states and 4396 transitions. Word has length 60 [2023-04-01 10:15:32,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:15:32,685 INFO L495 AbstractCegarLoop]: Abstraction has 3227 states and 4396 transitions. [2023-04-01 10:15:32,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 10:15:32,685 INFO L276 IsEmpty]: Start isEmpty. Operand 3227 states and 4396 transitions. [2023-04-01 10:15:32,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-04-01 10:15:32,688 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:15:32,688 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:15:32,702 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 10:15:32,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:15:32,900 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:15:32,900 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:15:32,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1833758318, now seen corresponding path program 1 times [2023-04-01 10:15:32,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:15:32,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837626674] [2023-04-01 10:15:32,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:15:32,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:15:32,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:15:33,228 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-01 10:15:33,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:15:33,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837626674] [2023-04-01 10:15:33,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837626674] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:15:33,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:15:33,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:15:33,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970046221] [2023-04-01 10:15:33,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:15:33,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:15:33,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:15:33,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:15:33,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:15:33,231 INFO L87 Difference]: Start difference. First operand 3227 states and 4396 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 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 10:15:34,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:15:34,714 INFO L93 Difference]: Finished difference Result 8370 states and 11835 transitions. [2023-04-01 10:15:34,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:15:34,714 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 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 173 [2023-04-01 10:15:34,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:15:34,736 INFO L225 Difference]: With dead ends: 8370 [2023-04-01 10:15:34,736 INFO L226 Difference]: Without dead ends: 5148 [2023-04-01 10:15:34,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:15:34,745 INFO L413 NwaCegarLoop]: 413 mSDtfsCounter, 228 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-01 10:15:34,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 429 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-01 10:15:34,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5148 states. [2023-04-01 10:15:34,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5148 to 4102. [2023-04-01 10:15:34,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4102 states, 3988 states have (on average 1.2670511534603812) internal successors, (5053), 4048 states have internal predecessors, (5053), 27 states have call successors, (27), 27 states have call predecessors, (27), 86 states have return successors, (406), 26 states have call predecessors, (406), 26 states have call successors, (406) [2023-04-01 10:15:34,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4102 states to 4102 states and 5486 transitions. [2023-04-01 10:15:34,856 INFO L78 Accepts]: Start accepts. Automaton has 4102 states and 5486 transitions. Word has length 173 [2023-04-01 10:15:34,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:15:34,857 INFO L495 AbstractCegarLoop]: Abstraction has 4102 states and 5486 transitions. [2023-04-01 10:15:34,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 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 10:15:34,857 INFO L276 IsEmpty]: Start isEmpty. Operand 4102 states and 5486 transitions. [2023-04-01 10:15:34,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2023-04-01 10:15:34,859 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:15:34,859 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:15:34,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 10:15:34,860 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:15:34,860 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:15:34,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1602878250, now seen corresponding path program 1 times [2023-04-01 10:15:34,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:15:34,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624141433] [2023-04-01 10:15:34,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:15:34,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:15:34,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:15:35,110 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:15:35,111 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:15:35,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624141433] [2023-04-01 10:15:35,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624141433] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:15:35,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636807293] [2023-04-01 10:15:35,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:15:35,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:15:35,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:15:35,113 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 10:15:35,137 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 10:15:35,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:15:35,252 INFO L262 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 10:15:35,264 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:15:35,324 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:15:35,324 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:15:35,437 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:15:35,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636807293] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:15:35,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1598794402] [2023-04-01 10:15:35,492 INFO L159 IcfgInterpreter]: Started Sifa with 148 locations of interest [2023-04-01 10:15:35,493 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:15:35,500 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:15:35,508 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:15:35,509 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:15:35,929 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 83 for LOIs [2023-04-01 10:15:36,374 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 38 [2023-04-01 10:15:36,594 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 6480 conjuctions. This might take some time... [2023-04-01 10:15:36,761 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 110 conjuctions. [2023-04-01 10:15:45,860 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 23