/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/eca-rers2012/Problem02_label41.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 03:18:00,741 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 03:18:00,742 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 03:18:00,771 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 03:18:00,771 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 03:18:00,772 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 03:18:00,773 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 03:18:00,775 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 03:18:00,776 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 03:18:00,780 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 03:18:00,780 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 03:18:00,781 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 03:18:00,782 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 03:18:00,782 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 03:18:00,783 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 03:18:00,784 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 03:18:00,785 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 03:18:00,791 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 03:18:00,793 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 03:18:00,794 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 03:18:00,795 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 03:18:00,800 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 03:18:00,801 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 03:18:00,802 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 03:18:00,808 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 03:18:00,808 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 03:18:00,809 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 03:18:00,809 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 03:18:00,810 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 03:18:00,810 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 03:18:00,810 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 03:18:00,811 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 03:18:00,812 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 03:18:00,812 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 03:18:00,813 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 03:18:00,813 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 03:18:00,814 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 03:18:00,814 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 03:18:00,814 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 03:18:00,815 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 03:18:00,815 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 03:18:00,821 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 03:18:00,845 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 03:18:00,845 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 03:18:00,846 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 03:18:00,846 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 03:18:00,846 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 03:18:00,847 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 03:18:00,847 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 03:18:00,847 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 03:18:00,847 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 03:18:00,847 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 03:18:00,847 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 03:18:00,847 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 03:18:00,848 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 03:18:00,848 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 03:18:00,848 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 03:18:00,848 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 03:18:00,848 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 03:18:00,848 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 03:18:00,849 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 03:18:00,849 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 03:18:00,849 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 03:18:00,849 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 03:18:00,849 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 03:18:00,849 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 03:18:00,849 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 03:18:00,850 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 03:18:00,850 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 03:18:00,850 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 03:18:00,850 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 03:18:00,850 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 03:18:00,850 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 03:18:00,850 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 03:18:00,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:18:00,851 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 03:18:00,851 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 03:18:00,851 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 03:18:00,851 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 03:18:00,851 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 03:18:00,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 03:18:00,851 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 03:18:00,852 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 03:18:00,852 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 03:18:01,057 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 03:18:01,079 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 03:18:01,081 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 03:18:01,082 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 03:18:01,083 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 03:18:01,084 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem02_label41.c [2023-04-01 03:18:02,286 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 03:18:02,549 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 03:18:02,550 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem02_label41.c [2023-04-01 03:18:02,560 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e74c7986/1b50cd592ced466c8af4b7c39b926625/FLAGf5ccf8e82 [2023-04-01 03:18:02,574 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e74c7986/1b50cd592ced466c8af4b7c39b926625 [2023-04-01 03:18:02,576 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 03:18:02,578 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 03:18:02,579 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 03:18:02,579 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 03:18:02,582 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 03:18:02,582 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:18:02" (1/1) ... [2023-04-01 03:18:02,583 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6709e75e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:18:02, skipping insertion in model container [2023-04-01 03:18:02,583 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:18:02" (1/1) ... [2023-04-01 03:18:02,589 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 03:18:02,642 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 03:18:02,904 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_label41.c[15650,15663] [2023-04-01 03:18:02,960 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:18:02,981 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 03:18:03,077 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_label41.c[15650,15663] [2023-04-01 03:18:03,089 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:18:03,103 INFO L208 MainTranslator]: Completed translation [2023-04-01 03:18:03,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:18:03 WrapperNode [2023-04-01 03:18:03,104 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 03:18:03,105 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 03:18:03,105 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 03:18:03,105 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 03:18:03,123 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:18:03" (1/1) ... [2023-04-01 03:18:03,123 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:18:03" (1/1) ... [2023-04-01 03:18:03,148 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:18:03" (1/1) ... [2023-04-01 03:18:03,149 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:18:03" (1/1) ... [2023-04-01 03:18:03,181 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:18:03" (1/1) ... [2023-04-01 03:18:03,196 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:18:03" (1/1) ... [2023-04-01 03:18:03,202 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:18:03" (1/1) ... [2023-04-01 03:18:03,206 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:18:03" (1/1) ... [2023-04-01 03:18:03,229 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 03:18:03,239 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 03:18:03,240 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 03:18:03,240 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 03:18:03,241 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:18:03" (1/1) ... [2023-04-01 03:18:03,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:18:03,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:18:03,275 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 03:18:03,299 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 03:18:03,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 03:18:03,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 03:18:03,319 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 03:18:03,320 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 03:18:03,320 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 03:18:03,321 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 03:18:03,321 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 03:18:03,321 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 03:18:03,321 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 03:18:03,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 03:18:03,321 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 03:18:03,321 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 03:18:03,321 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 03:18:03,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 03:18:03,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 03:18:03,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 03:18:03,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 03:18:03,322 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 03:18:03,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 03:18:03,405 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 03:18:03,407 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 03:18:04,328 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 03:18:04,560 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 03:18:04,561 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 03:18:04,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:18:04 BoogieIcfgContainer [2023-04-01 03:18:04,563 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 03:18:04,566 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 03:18:04,566 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 03:18:04,569 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 03:18:04,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 03:18:02" (1/3) ... [2023-04-01 03:18:04,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@685c1946 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:18:04, skipping insertion in model container [2023-04-01 03:18:04,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:18:03" (2/3) ... [2023-04-01 03:18:04,570 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@685c1946 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:18:04, skipping insertion in model container [2023-04-01 03:18:04,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:18:04" (3/3) ... [2023-04-01 03:18:04,575 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem02_label41.c [2023-04-01 03:18:04,593 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 03:18:04,593 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 03:18:04,648 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 03:18:04,654 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;@54a00b17, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 03:18:04,654 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 03:18:04,658 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 03:18:04,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-01 03:18:04,667 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:18:04,667 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 03:18:04,668 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:18:04,672 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:18:04,673 INFO L85 PathProgramCache]: Analyzing trace with hash -2027414568, now seen corresponding path program 1 times [2023-04-01 03:18:04,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:18:04,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502198218] [2023-04-01 03:18:04,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:18:04,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:18:04,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:18:05,274 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 03:18:05,275 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:18:05,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502198218] [2023-04-01 03:18:05,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502198218] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:18:05,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:18:05,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 03:18:05,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757154884] [2023-04-01 03:18:05,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:18:05,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 03:18:05,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:18:05,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 03:18:05,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 03:18:05,322 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 03:18:05,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:18:05,814 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2023-04-01 03:18:05,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 03:18:05,816 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 03:18:05,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:18:05,828 INFO L225 Difference]: With dead ends: 273 [2023-04-01 03:18:05,829 INFO L226 Difference]: Without dead ends: 175 [2023-04-01 03:18:05,832 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 03:18:05,834 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 52 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 03:18:05,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 44 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 03:18:05,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-04-01 03:18:05,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2023-04-01 03:18:05,899 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 03:18:05,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 312 transitions. [2023-04-01 03:18:05,902 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 312 transitions. Word has length 86 [2023-04-01 03:18:05,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:18:05,903 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 312 transitions. [2023-04-01 03:18:05,903 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 03:18:05,903 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 312 transitions. [2023-04-01 03:18:05,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-04-01 03:18:05,906 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:18:05,906 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 03:18:05,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 03:18:05,907 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:18:05,909 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:18:05,909 INFO L85 PathProgramCache]: Analyzing trace with hash -78203996, now seen corresponding path program 1 times [2023-04-01 03:18:05,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:18:05,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712070998] [2023-04-01 03:18:05,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:18:05,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:18:05,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:18:06,591 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 03:18:06,591 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:18:06,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712070998] [2023-04-01 03:18:06,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712070998] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:18:06,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:18:06,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 03:18:06,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240152727] [2023-04-01 03:18:06,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:18:06,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:18:06,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:18:06,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:18:06,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:18:06,596 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 03:18:07,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:18:07,112 INFO L93 Difference]: Finished difference Result 537 states and 970 transitions. [2023-04-01 03:18:07,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 03:18:07,112 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 03:18:07,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:18:07,116 INFO L225 Difference]: With dead ends: 537 [2023-04-01 03:18:07,116 INFO L226 Difference]: Without dead ends: 367 [2023-04-01 03:18:07,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 03:18:07,118 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 268 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 03:18:07,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 46 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 03:18:07,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2023-04-01 03:18:07,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 359. [2023-04-01 03:18:07,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 339 states have (on average 1.6224188790560472) internal successors, (550), 347 states have internal predecessors, (550), 6 states have call successors, (6), 6 states have call predecessors, (6), 13 states have return successors, (27), 5 states have call predecessors, (27), 5 states have call successors, (27) [2023-04-01 03:18:07,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 583 transitions. [2023-04-01 03:18:07,155 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 583 transitions. Word has length 94 [2023-04-01 03:18:07,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:18:07,161 INFO L495 AbstractCegarLoop]: Abstraction has 359 states and 583 transitions. [2023-04-01 03:18:07,161 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 03:18:07,161 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 583 transitions. [2023-04-01 03:18:07,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-04-01 03:18:07,165 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:18:07,165 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 03:18:07,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 03:18:07,166 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:18:07,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:18:07,166 INFO L85 PathProgramCache]: Analyzing trace with hash -4793616, now seen corresponding path program 1 times [2023-04-01 03:18:07,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:18:07,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254716195] [2023-04-01 03:18:07,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:18:07,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:18:07,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:18:07,367 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:18:07,367 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:18:07,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254716195] [2023-04-01 03:18:07,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254716195] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:18:07,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:18:07,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 03:18:07,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959557261] [2023-04-01 03:18:07,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:18:07,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:18:07,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:18:07,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:18:07,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:18:07,370 INFO L87 Difference]: Start difference. First operand 359 states and 583 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), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:18:07,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:18:07,746 INFO L93 Difference]: Finished difference Result 1113 states and 1922 transitions. [2023-04-01 03:18:07,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 03:18:07,747 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), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 100 [2023-04-01 03:18:07,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:18:07,753 INFO L225 Difference]: With dead ends: 1113 [2023-04-01 03:18:07,753 INFO L226 Difference]: Without dead ends: 759 [2023-04-01 03:18:07,761 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 03:18:07,762 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 340 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 03:18:07,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 42 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 03:18:07,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2023-04-01 03:18:07,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 729. [2023-04-01 03:18:07,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 684 states have (on average 1.5) internal successors, (1026), 709 states have internal predecessors, (1026), 10 states have call successors, (10), 10 states have call predecessors, (10), 34 states have return successors, (113), 9 states have call predecessors, (113), 9 states have call successors, (113) [2023-04-01 03:18:07,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 1149 transitions. [2023-04-01 03:18:07,815 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 1149 transitions. Word has length 100 [2023-04-01 03:18:07,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:18:07,816 INFO L495 AbstractCegarLoop]: Abstraction has 729 states and 1149 transitions. [2023-04-01 03:18:07,816 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), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:18:07,817 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 1149 transitions. [2023-04-01 03:18:07,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-04-01 03:18:07,820 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:18:07,821 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:18:07,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 03:18:07,821 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:18:07,823 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:18:07,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1875725267, now seen corresponding path program 1 times [2023-04-01 03:18:07,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:18:07,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101616541] [2023-04-01 03:18:07,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:18:07,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:18:07,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:18:08,062 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:18:08,062 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:18:08,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101616541] [2023-04-01 03:18:08,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101616541] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:18:08,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:18:08,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 03:18:08,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763106976] [2023-04-01 03:18:08,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:18:08,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:18:08,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:18:08,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:18:08,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:18:08,067 INFO L87 Difference]: Start difference. First operand 729 states and 1149 transitions. Second operand has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 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 03:18:08,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:18:08,488 INFO L93 Difference]: Finished difference Result 1855 states and 2986 transitions. [2023-04-01 03:18:08,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 03:18:08,490 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 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 114 [2023-04-01 03:18:08,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:18:08,498 INFO L225 Difference]: With dead ends: 1855 [2023-04-01 03:18:08,498 INFO L226 Difference]: Without dead ends: 1131 [2023-04-01 03:18:08,500 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 03:18:08,508 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 268 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 03:18:08,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 44 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 03:18:08,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2023-04-01 03:18:08,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 1099. [2023-04-01 03:18:08,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1099 states, 1029 states have (on average 1.4110787172011663) internal successors, (1452), 1071 states have internal predecessors, (1452), 14 states have call successors, (14), 14 states have call predecessors, (14), 55 states have return successors, (189), 13 states have call predecessors, (189), 13 states have call successors, (189) [2023-04-01 03:18:08,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1099 states to 1099 states and 1655 transitions. [2023-04-01 03:18:08,560 INFO L78 Accepts]: Start accepts. Automaton has 1099 states and 1655 transitions. Word has length 114 [2023-04-01 03:18:08,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:18:08,561 INFO L495 AbstractCegarLoop]: Abstraction has 1099 states and 1655 transitions. [2023-04-01 03:18:08,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 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 03:18:08,561 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states and 1655 transitions. [2023-04-01 03:18:08,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-04-01 03:18:08,565 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:18:08,565 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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 03:18:08,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 03:18:08,565 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:18:08,566 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:18:08,566 INFO L85 PathProgramCache]: Analyzing trace with hash 988233292, now seen corresponding path program 1 times [2023-04-01 03:18:08,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:18:08,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374376217] [2023-04-01 03:18:08,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:18:08,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:18:08,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:18:08,749 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 03:18:08,749 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:18:08,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374376217] [2023-04-01 03:18:08,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374376217] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:18:08,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125121061] [2023-04-01 03:18:08,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:18:08,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:18:08,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:18:08,757 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 03:18:08,777 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 03:18:08,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:18:08,876 INFO L262 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 03:18:08,883 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:18:09,040 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-01 03:18:09,041 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 03:18:09,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125121061] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:18:09,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 03:18:09,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 03:18:09,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867523080] [2023-04-01 03:18:09,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:18:09,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:18:09,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:18:09,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:18:09,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 03:18:09,043 INFO L87 Difference]: Start difference. First operand 1099 states and 1655 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 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 03:18:09,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:18:09,448 INFO L93 Difference]: Finished difference Result 2921 states and 4486 transitions. [2023-04-01 03:18:09,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 03:18:09,448 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 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 118 [2023-04-01 03:18:09,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:18:09,458 INFO L225 Difference]: With dead ends: 2921 [2023-04-01 03:18:09,459 INFO L226 Difference]: Without dead ends: 1827 [2023-04-01 03:18:09,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 117 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 03:18:09,462 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 255 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 03:18:09,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 42 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 03:18:09,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1827 states. [2023-04-01 03:18:09,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1827 to 1801. [2023-04-01 03:18:09,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1801 states, 1700 states have (on average 1.2958823529411765) internal successors, (2203), 1757 states have internal predecessors, (2203), 22 states have call successors, (22), 22 states have call predecessors, (22), 78 states have return successors, (287), 21 states have call predecessors, (287), 21 states have call successors, (287) [2023-04-01 03:18:09,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1801 states to 1801 states and 2512 transitions. [2023-04-01 03:18:09,535 INFO L78 Accepts]: Start accepts. Automaton has 1801 states and 2512 transitions. Word has length 118 [2023-04-01 03:18:09,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:18:09,536 INFO L495 AbstractCegarLoop]: Abstraction has 1801 states and 2512 transitions. [2023-04-01 03:18:09,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 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 03:18:09,537 INFO L276 IsEmpty]: Start isEmpty. Operand 1801 states and 2512 transitions. [2023-04-01 03:18:09,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-04-01 03:18:09,541 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:18:09,541 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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 03:18:09,555 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 03:18:09,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:18:09,751 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:18:09,751 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:18:09,751 INFO L85 PathProgramCache]: Analyzing trace with hash 474982490, now seen corresponding path program 1 times [2023-04-01 03:18:09,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:18:09,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003174509] [2023-04-01 03:18:09,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:18:09,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:18:09,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:18:10,012 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 34 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 03:18:10,013 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:18:10,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003174509] [2023-04-01 03:18:10,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003174509] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:18:10,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400351534] [2023-04-01 03:18:10,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:18:10,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:18:10,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:18:10,015 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 03:18:10,040 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 03:18:10,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:18:10,132 INFO L262 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 03:18:10,136 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:18:10,204 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 45 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 03:18:10,205 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:18:10,312 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 45 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 03:18:10,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400351534] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:18:10,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2067078022] [2023-04-01 03:18:10,337 INFO L159 IcfgInterpreter]: Started Sifa with 90 locations of interest [2023-04-01 03:18:10,337 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:18:10,341 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:18:10,404 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:18:10,405 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:18:10,687 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 65 for LOIs