/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/Problem02_label53.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 09:22:00,400 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 09:22:00,401 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 09:22:00,427 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 09:22:00,427 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 09:22:00,428 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 09:22:00,429 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 09:22:00,430 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 09:22:00,431 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 09:22:00,432 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 09:22:00,433 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 09:22:00,433 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 09:22:00,434 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 09:22:00,435 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 09:22:00,435 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 09:22:00,436 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 09:22:00,437 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 09:22:00,437 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 09:22:00,438 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 09:22:00,440 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 09:22:00,441 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 09:22:00,442 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 09:22:00,442 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 09:22:00,443 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 09:22:00,446 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 09:22:00,446 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 09:22:00,446 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 09:22:00,447 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 09:22:00,447 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 09:22:00,448 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 09:22:00,448 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 09:22:00,449 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 09:22:00,449 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 09:22:00,450 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 09:22:00,451 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 09:22:00,451 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 09:22:00,451 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 09:22:00,452 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 09:22:00,452 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 09:22:00,452 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 09:22:00,453 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 09:22:00,454 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 09:22:00,473 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 09:22:00,473 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 09:22:00,474 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 09:22:00,474 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 09:22:00,474 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 09:22:00,475 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 09:22:00,475 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 09:22:00,475 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 09:22:00,475 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 09:22:00,475 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 09:22:00,475 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 09:22:00,475 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 09:22:00,475 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 09:22:00,476 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 09:22:00,476 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 09:22:00,476 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 09:22:00,476 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 09:22:00,476 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 09:22:00,477 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 09:22:00,477 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 09:22:00,477 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 09:22:00,477 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 09:22:00,477 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 09:22:00,477 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 09:22:00,477 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 09:22:00,477 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 09:22:00,477 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 09:22:00,478 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 09:22:00,478 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 09:22:00,478 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 09:22:00,478 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 09:22:00,478 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 09:22:00,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:22:00,478 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 09:22:00,479 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 09:22:00,479 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 09:22:00,479 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 09:22:00,479 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 09:22:00,479 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 09:22:00,479 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 09:22:00,479 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 09:22:00,479 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 09:22:00,648 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 09:22:00,672 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 09:22:00,674 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 09:22:00,675 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 09:22:00,676 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 09:22:00,677 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem02_label53.c [2023-04-01 09:22:01,851 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 09:22:02,096 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 09:22:02,097 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem02_label53.c [2023-04-01 09:22:02,121 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00f3ebc3c/7b1bb051b5cb428384b4e505c0e349b2/FLAG39bbe7d36 [2023-04-01 09:22:02,136 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00f3ebc3c/7b1bb051b5cb428384b4e505c0e349b2 [2023-04-01 09:22:02,139 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 09:22:02,141 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 09:22:02,145 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 09:22:02,145 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 09:22:02,148 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 09:22:02,149 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:22:02" (1/1) ... [2023-04-01 09:22:02,150 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1acd69ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:22:02, skipping insertion in model container [2023-04-01 09:22:02,150 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:22:02" (1/1) ... [2023-04-01 09:22:02,156 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 09:22:02,200 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 09:22:02,504 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/Problem02_label53.c[21108,21121] [2023-04-01 09:22:02,535 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:22:02,543 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 09:22:02,657 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/Problem02_label53.c[21108,21121] [2023-04-01 09:22:02,661 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:22:02,683 INFO L208 MainTranslator]: Completed translation [2023-04-01 09:22:02,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:22:02 WrapperNode [2023-04-01 09:22:02,684 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 09:22:02,686 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 09:22:02,686 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 09:22:02,686 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 09:22:02,696 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:22:02" (1/1) ... [2023-04-01 09:22:02,696 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:22:02" (1/1) ... [2023-04-01 09:22:02,717 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:22:02" (1/1) ... [2023-04-01 09:22:02,717 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:22:02" (1/1) ... [2023-04-01 09:22:02,774 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:22:02" (1/1) ... [2023-04-01 09:22:02,780 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:22:02" (1/1) ... [2023-04-01 09:22:02,784 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:22:02" (1/1) ... [2023-04-01 09:22:02,787 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:22:02" (1/1) ... [2023-04-01 09:22:02,792 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 09:22:02,793 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 09:22:02,793 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 09:22:02,793 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 09:22:02,794 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:22:02" (1/1) ... [2023-04-01 09:22:02,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:22:02,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:22:02,829 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 09:22:02,853 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 09:22:02,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 09:22:02,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 09:22:02,867 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 09:22:02,868 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 09:22:02,868 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 09:22:02,868 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 09:22:02,869 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 09:22:02,869 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 09:22:02,869 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 09:22:02,869 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 09:22:02,869 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 09:22:02,869 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 09:22:02,869 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 09:22:02,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 09:22:02,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 09:22:02,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 09:22:02,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 09:22:02,870 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 09:22:02,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 09:22:02,955 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 09:22:02,957 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 09:22:03,852 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 09:22:04,115 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 09:22:04,116 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 09:22:04,118 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:22:04 BoogieIcfgContainer [2023-04-01 09:22:04,118 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 09:22:04,120 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 09:22:04,121 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 09:22:04,123 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 09:22:04,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 09:22:02" (1/3) ... [2023-04-01 09:22:04,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48a43b6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:22:04, skipping insertion in model container [2023-04-01 09:22:04,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:22:02" (2/3) ... [2023-04-01 09:22:04,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48a43b6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:22:04, skipping insertion in model container [2023-04-01 09:22:04,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:22:04" (3/3) ... [2023-04-01 09:22:04,125 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem02_label53.c [2023-04-01 09:22:04,141 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 09:22:04,141 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 09:22:04,189 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 09:22:04,196 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;@53ffb508, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 09:22:04,196 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 09:22:04,200 INFO L276 IsEmpty]: Start isEmpty. Operand has 95 states, 87 states have (on average 1.9080459770114941) internal successors, (166), 88 states have internal predecessors, (166), 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 09:22:04,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-01 09:22:04,210 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:22:04,210 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:22:04,210 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:22:04,214 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:22:04,214 INFO L85 PathProgramCache]: Analyzing trace with hash -818160041, now seen corresponding path program 1 times [2023-04-01 09:22:04,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:22:04,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829748657] [2023-04-01 09:22:04,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:22:04,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:22:04,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:22:04,728 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 09:22:04,728 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:22:04,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829748657] [2023-04-01 09:22:04,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829748657] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:22:04,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:22:04,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 09:22:04,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844922313] [2023-04-01 09:22:04,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:22:04,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 09:22:04,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:22:04,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 09:22:04,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 09:22:04,759 INFO L87 Difference]: Start difference. First operand has 95 states, 87 states have (on average 1.9080459770114941) internal successors, (166), 88 states have internal predecessors, (166), 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 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 09:22:05,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:22:05,084 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2023-04-01 09:22:05,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 09:22:05,086 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 86 [2023-04-01 09:22:05,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:22:05,095 INFO L225 Difference]: With dead ends: 273 [2023-04-01 09:22:05,095 INFO L226 Difference]: Without dead ends: 175 [2023-04-01 09:22:05,098 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 09:22:05,101 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 25 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 09:22:05,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 76 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 09:22:05,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-04-01 09:22:05,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2023-04-01 09:22:05,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 167 states have (on average 1.81437125748503) internal successors, (303), 167 states have internal predecessors, (303), 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 09:22:05,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 312 transitions. [2023-04-01 09:22:05,195 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 312 transitions. Word has length 86 [2023-04-01 09:22:05,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:22:05,196 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 312 transitions. [2023-04-01 09:22:05,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 09:22:05,196 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 312 transitions. [2023-04-01 09:22:05,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-04-01 09:22:05,200 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:22:05,200 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:22:05,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 09:22:05,200 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:22:05,201 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:22:05,201 INFO L85 PathProgramCache]: Analyzing trace with hash 363562787, now seen corresponding path program 1 times [2023-04-01 09:22:05,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:22:05,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819025950] [2023-04-01 09:22:05,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:22:05,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:22:05,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:22:05,832 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 09:22:05,832 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:22:05,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819025950] [2023-04-01 09:22:05,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819025950] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:22:05,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:22:05,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:22:05,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108450589] [2023-04-01 09:22:05,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:22:05,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:22:05,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:22:05,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:22:05,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:22:05,837 INFO L87 Difference]: Start difference. First operand 175 states and 312 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 09:22:06,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:22:06,338 INFO L93 Difference]: Finished difference Result 535 states and 970 transitions. [2023-04-01 09:22:06,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 09:22:06,339 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 09:22:06,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:22:06,343 INFO L225 Difference]: With dead ends: 535 [2023-04-01 09:22:06,343 INFO L226 Difference]: Without dead ends: 365 [2023-04-01 09:22:06,344 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 09:22:06,345 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 268 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 09:22:06,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 47 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 09:22:06,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2023-04-01 09:22:06,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 359. [2023-04-01 09:22:06,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 339 states have (on average 1.640117994100295) internal successors, (556), 347 states have internal predecessors, (556), 6 states have call successors, (6), 6 states have call predecessors, (6), 13 states have return successors, (29), 5 states have call predecessors, (29), 5 states have call successors, (29) [2023-04-01 09:22:06,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 591 transitions. [2023-04-01 09:22:06,372 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 591 transitions. Word has length 94 [2023-04-01 09:22:06,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:22:06,373 INFO L495 AbstractCegarLoop]: Abstraction has 359 states and 591 transitions. [2023-04-01 09:22:06,373 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 09:22:06,373 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 591 transitions. [2023-04-01 09:22:06,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-04-01 09:22:06,375 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:22:06,376 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:22:06,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 09:22:06,376 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:22:06,376 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:22:06,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1115178089, now seen corresponding path program 1 times [2023-04-01 09:22:06,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:22:06,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070744122] [2023-04-01 09:22:06,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:22:06,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:22:06,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:22:06,665 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 09:22:06,665 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:22:06,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070744122] [2023-04-01 09:22:06,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070744122] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:22:06,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:22:06,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:22:06,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702906973] [2023-04-01 09:22:06,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:22:06,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:22:06,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:22:06,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:22:06,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:22:06,670 INFO L87 Difference]: Start difference. First operand 359 states and 591 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 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 09:22:07,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:22:07,122 INFO L93 Difference]: Finished difference Result 1107 states and 1947 transitions. [2023-04-01 09:22:07,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 09:22:07,123 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 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 97 [2023-04-01 09:22:07,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:22:07,129 INFO L225 Difference]: With dead ends: 1107 [2023-04-01 09:22:07,129 INFO L226 Difference]: Without dead ends: 753 [2023-04-01 09:22:07,131 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 09:22:07,132 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 288 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 09:22:07,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 44 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 09:22:07,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2023-04-01 09:22:07,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 725. [2023-04-01 09:22:07,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725 states, 682 states have (on average 1.5601173020527859) internal successors, (1064), 705 states have internal predecessors, (1064), 10 states have call successors, (10), 10 states have call predecessors, (10), 32 states have return successors, (109), 9 states have call predecessors, (109), 9 states have call successors, (109) [2023-04-01 09:22:07,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 1183 transitions. [2023-04-01 09:22:07,185 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 1183 transitions. Word has length 97 [2023-04-01 09:22:07,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:22:07,185 INFO L495 AbstractCegarLoop]: Abstraction has 725 states and 1183 transitions. [2023-04-01 09:22:07,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 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 09:22:07,186 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 1183 transitions. [2023-04-01 09:22:07,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-04-01 09:22:07,201 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:22:07,201 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2023-04-01 09:22:07,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 09:22:07,201 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:22:07,202 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:22:07,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1834619895, now seen corresponding path program 1 times [2023-04-01 09:22:07,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:22:07,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900711841] [2023-04-01 09:22:07,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:22:07,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:22:07,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:22:07,402 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 09:22:07,403 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:22:07,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900711841] [2023-04-01 09:22:07,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900711841] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:22:07,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97693943] [2023-04-01 09:22:07,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:22:07,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:22:07,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:22:07,408 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 09:22:07,410 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 09:22:07,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:22:07,521 INFO L262 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 09:22:07,526 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:22:07,637 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 09:22:07,637 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 09:22:07,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97693943] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:22:07,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 09:22:07,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 09:22:07,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690314770] [2023-04-01 09:22:07,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:22:07,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:22:07,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:22:07,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:22:07,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 09:22:07,639 INFO L87 Difference]: Start difference. First operand 725 states and 1183 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 09:22:08,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:22:08,060 INFO L93 Difference]: Finished difference Result 1833 states and 3080 transitions. [2023-04-01 09:22:08,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 09:22:08,061 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 106 [2023-04-01 09:22:08,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:22:08,069 INFO L225 Difference]: With dead ends: 1833 [2023-04-01 09:22:08,070 INFO L226 Difference]: Without dead ends: 1113 [2023-04-01 09:22:08,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-04-01 09:22:08,078 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 256 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 09:22:08,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 40 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 09:22:08,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2023-04-01 09:22:08,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 1091. [2023-04-01 09:22:08,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1091 states, 1025 states have (on average 1.431219512195122) internal successors, (1467), 1063 states have internal predecessors, (1467), 14 states have call successors, (14), 14 states have call predecessors, (14), 51 states have return successors, (202), 13 states have call predecessors, (202), 13 states have call successors, (202) [2023-04-01 09:22:08,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1091 states to 1091 states and 1683 transitions. [2023-04-01 09:22:08,124 INFO L78 Accepts]: Start accepts. Automaton has 1091 states and 1683 transitions. Word has length 106 [2023-04-01 09:22:08,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:22:08,124 INFO L495 AbstractCegarLoop]: Abstraction has 1091 states and 1683 transitions. [2023-04-01 09:22:08,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 09:22:08,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1091 states and 1683 transitions. [2023-04-01 09:22:08,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-04-01 09:22:08,132 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:22:08,133 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:22:08,144 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 09:22:08,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:22:08,340 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:22:08,341 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:22:08,341 INFO L85 PathProgramCache]: Analyzing trace with hash 856787175, now seen corresponding path program 1 times [2023-04-01 09:22:08,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:22:08,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181507655] [2023-04-01 09:22:08,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:22:08,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:22:08,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:22:08,612 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:22:08,612 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:22:08,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181507655] [2023-04-01 09:22:08,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181507655] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:22:08,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032598205] [2023-04-01 09:22:08,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:22:08,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:22:08,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:22:08,614 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 09:22:08,636 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 09:22:08,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:22:08,728 INFO L262 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 09:22:08,732 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:22:08,848 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 09:22:08,849 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 09:22:08,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032598205] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:22:08,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 09:22:08,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 09:22:08,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506884212] [2023-04-01 09:22:08,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:22:08,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 09:22:08,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:22:08,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 09:22:08,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 09:22:08,853 INFO L87 Difference]: Start difference. First operand 1091 states and 1683 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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 09:22:09,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:22:09,135 INFO L93 Difference]: Finished difference Result 2865 states and 4525 transitions. [2023-04-01 09:22:09,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 09:22:09,135 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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 107 [2023-04-01 09:22:09,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:22:09,149 INFO L225 Difference]: With dead ends: 2865 [2023-04-01 09:22:09,149 INFO L226 Difference]: Without dead ends: 1779 [2023-04-01 09:22:09,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 107 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 09:22:09,152 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 41 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 09:22:09,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 43 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 09:22:09,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1779 states. [2023-04-01 09:22:09,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1779 to 1779. [2023-04-01 09:22:09,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1779 states, 1689 states have (on average 1.329188869153345) internal successors, (2245), 1735 states have internal predecessors, (2245), 22 states have call successors, (22), 22 states have call predecessors, (22), 67 states have return successors, (333), 21 states have call predecessors, (333), 21 states have call successors, (333) [2023-04-01 09:22:09,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1779 states to 1779 states and 2600 transitions. [2023-04-01 09:22:09,208 INFO L78 Accepts]: Start accepts. Automaton has 1779 states and 2600 transitions. Word has length 107 [2023-04-01 09:22:09,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:22:09,210 INFO L495 AbstractCegarLoop]: Abstraction has 1779 states and 2600 transitions. [2023-04-01 09:22:09,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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 09:22:09,210 INFO L276 IsEmpty]: Start isEmpty. Operand 1779 states and 2600 transitions. [2023-04-01 09:22:09,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-04-01 09:22:09,215 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:22:09,215 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:22:09,228 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 09:22:09,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:22:09,422 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:22:09,422 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:22:09,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1623009434, now seen corresponding path program 1 times [2023-04-01 09:22:09,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:22:09,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87241751] [2023-04-01 09:22:09,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:22:09,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:22:09,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:22:09,549 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 51 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:22:09,550 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:22:09,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87241751] [2023-04-01 09:22:09,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87241751] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:22:09,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269337588] [2023-04-01 09:22:09,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:22:09,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:22:09,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:22:09,565 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 09:22:09,592 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 09:22:09,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:22:09,693 INFO L262 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 09:22:09,696 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:22:09,790 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 09:22:09,790 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 09:22:09,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269337588] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:22:09,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 09:22:09,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 09:22:09,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664051215] [2023-04-01 09:22:09,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:22:09,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:22:09,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:22:09,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:22:09,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 09:22:09,793 INFO L87 Difference]: Start difference. First operand 1779 states and 2600 transitions. Second operand has 5 states, 5 states have (on average 23.2) internal successors, (116), 4 states have internal predecessors, (116), 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 09:22:10,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:22:10,303 INFO L93 Difference]: Finished difference Result 4409 states and 6853 transitions. [2023-04-01 09:22:10,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 09:22:10,303 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 4 states have internal predecessors, (116), 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 132 [2023-04-01 09:22:10,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:22:10,316 INFO L225 Difference]: With dead ends: 4409 [2023-04-01 09:22:10,317 INFO L226 Difference]: Without dead ends: 2635 [2023-04-01 09:22:10,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-04-01 09:22:10,322 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 299 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 09:22:10,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 37 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 09:22:10,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2635 states. [2023-04-01 09:22:10,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2635 to 2579. [2023-04-01 09:22:10,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2579 states, 2449 states have (on average 1.3046141282155983) internal successors, (3195), 2517 states have internal predecessors, (3195), 31 states have call successors, (31), 31 states have call predecessors, (31), 98 states have return successors, (510), 30 states have call predecessors, (510), 30 states have call successors, (510) [2023-04-01 09:22:10,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2579 states to 2579 states and 3736 transitions. [2023-04-01 09:22:10,402 INFO L78 Accepts]: Start accepts. Automaton has 2579 states and 3736 transitions. Word has length 132 [2023-04-01 09:22:10,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:22:10,402 INFO L495 AbstractCegarLoop]: Abstraction has 2579 states and 3736 transitions. [2023-04-01 09:22:10,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 4 states have internal predecessors, (116), 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 09:22:10,403 INFO L276 IsEmpty]: Start isEmpty. Operand 2579 states and 3736 transitions. [2023-04-01 09:22:10,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-04-01 09:22:10,409 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:22:10,409 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 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] [2023-04-01 09:22:10,418 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 09:22:10,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:22:10,616 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:22:10,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:22:10,617 INFO L85 PathProgramCache]: Analyzing trace with hash 759700934, now seen corresponding path program 1 times [2023-04-01 09:22:10,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:22:10,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570594889] [2023-04-01 09:22:10,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:22:10,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:22:10,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:22:10,946 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 68 proven. 14 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-04-01 09:22:10,947 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:22:10,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570594889] [2023-04-01 09:22:10,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570594889] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:22:10,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458887013] [2023-04-01 09:22:10,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:22:10,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:22:10,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:22:10,949 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 09:22:10,951 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 09:22:11,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:22:11,072 INFO L262 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 09:22:11,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:22:11,128 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 77 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-01 09:22:11,128 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:22:11,214 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 83 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-01 09:22:11,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458887013] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:22:11,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1914359448] [2023-04-01 09:22:11,261 INFO L159 IcfgInterpreter]: Started Sifa with 90 locations of interest [2023-04-01 09:22:11,261 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:22:11,264 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:22:11,268 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:22:11,269 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:22:11,575 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 98 for LOIs