/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/Problem16_label37.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:19:09,971 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:19:09,973 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:19:10,010 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:19:10,010 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:19:10,012 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:19:10,014 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:19:10,016 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:19:10,017 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:19:10,021 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:19:10,022 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:19:10,023 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:19:10,023 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:19:10,025 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:19:10,026 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:19:10,026 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:19:10,027 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:19:10,027 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:19:10,029 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:19:10,032 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:19:10,033 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:19:10,034 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:19:10,034 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:19:10,035 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:19:10,045 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:19:10,046 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:19:10,046 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:19:10,046 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:19:10,047 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:19:10,047 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:19:10,047 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:19:10,048 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:19:10,048 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:19:10,049 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:19:10,049 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:19:10,049 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:19:10,050 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:19:10,050 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:19:10,050 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:19:10,050 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:19:10,051 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:19:10,054 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 04:19:10,074 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:19:10,075 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:19:10,075 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:19:10,075 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:19:10,076 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:19:10,076 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:19:10,076 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:19:10,076 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:19:10,076 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:19:10,076 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:19:10,077 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:19:10,077 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:19:10,077 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:19:10,077 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:19:10,077 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:19:10,077 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:19:10,078 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:19:10,078 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:19:10,078 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:19:10,078 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:19:10,078 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:19:10,078 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:19:10,078 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:19:10,078 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:19:10,079 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:19:10,079 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:19:10,079 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:19:10,079 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:19:10,079 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:19:10,079 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:19:10,079 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:19:10,079 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:19:10,079 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:19:10,079 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:19:10,079 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:19:10,080 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:19:10,080 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:19:10,080 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:19:10,080 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:19:10,080 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:19:10,080 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:19:10,080 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:19:10,301 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:19:10,330 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:19:10,332 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:19:10,332 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:19:10,333 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:19:10,333 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem16_label37.c [2023-04-01 04:19:11,440 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:19:11,844 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:19:11,845 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label37.c [2023-04-01 04:19:11,871 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b429106d6/13427112a5244c2a9d5da97369da5f82/FLAG3a29c34bc [2023-04-01 04:19:11,893 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b429106d6/13427112a5244c2a9d5da97369da5f82 [2023-04-01 04:19:11,895 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:19:11,896 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:19:11,899 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:19:11,899 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:19:11,901 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:19:11,902 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:19:11" (1/1) ... [2023-04-01 04:19:11,902 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@282eb5ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:19:11, skipping insertion in model container [2023-04-01 04:19:11,903 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:19:11" (1/1) ... [2023-04-01 04:19:11,921 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:19:11,992 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:19:12,137 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/Problem16_label37.c[2305,2318] [2023-04-01 04:19:12,438 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:19:12,451 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:19:12,471 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/Problem16_label37.c[2305,2318] [2023-04-01 04:19:12,666 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:19:12,679 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:19:12,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:19:12 WrapperNode [2023-04-01 04:19:12,679 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:19:12,680 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:19:12,681 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:19:12,681 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:19:12,688 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:19:12" (1/1) ... [2023-04-01 04:19:12,689 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:19:12" (1/1) ... [2023-04-01 04:19:12,710 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:19:12" (1/1) ... [2023-04-01 04:19:12,710 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:19:12" (1/1) ... [2023-04-01 04:19:12,767 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:19:12" (1/1) ... [2023-04-01 04:19:12,792 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:19:12" (1/1) ... [2023-04-01 04:19:12,813 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:19:12" (1/1) ... [2023-04-01 04:19:12,832 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:19:12" (1/1) ... [2023-04-01 04:19:12,838 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:19:12,839 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:19:12,839 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:19:12,839 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:19:12,839 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:19:12" (1/1) ... [2023-04-01 04:19:12,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:19:12,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:19:12,865 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 04:19:12,889 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 04:19:12,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:19:12,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:19:12,911 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:19:12,911 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:19:12,911 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:19:12,911 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:19:12,911 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:19:12,911 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:19:12,911 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:19:12,911 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:19:12,911 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:19:12,912 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:19:12,912 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:19:12,912 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:19:12,912 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:19:12,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:19:12,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:19:12,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:19:12,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:19:12,912 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:19:12,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:19:12,962 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:19:12,963 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:19:14,411 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:19:15,129 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:19:15,129 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:19:15,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:19:15 BoogieIcfgContainer [2023-04-01 04:19:15,131 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:19:15,133 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:19:15,133 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:19:15,135 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:19:15,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:19:11" (1/3) ... [2023-04-01 04:19:15,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bc6bdcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:19:15, skipping insertion in model container [2023-04-01 04:19:15,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:19:12" (2/3) ... [2023-04-01 04:19:15,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bc6bdcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:19:15, skipping insertion in model container [2023-04-01 04:19:15,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:19:15" (3/3) ... [2023-04-01 04:19:15,137 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label37.c [2023-04-01 04:19:15,148 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:19:15,148 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:19:15,252 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:19:15,257 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;@2fd78c33, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:19:15,257 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:19:15,260 INFO L276 IsEmpty]: Start isEmpty. Operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 04:19:15,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:19:15,265 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:19:15,265 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:19:15,266 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:19:15,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:19:15,269 INFO L85 PathProgramCache]: Analyzing trace with hash -510226361, now seen corresponding path program 1 times [2023-04-01 04:19:15,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:19:15,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193577413] [2023-04-01 04:19:15,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:19:15,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:19:15,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:19:15,466 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 04:19:15,466 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:19:15,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193577413] [2023-04-01 04:19:15,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193577413] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:19:15,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:19:15,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:19:15,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616433666] [2023-04-01 04:19:15,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:19:15,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:19:15,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:19:15,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:19:15,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:19:15,490 INFO L87 Difference]: Start difference. First operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:19:17,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:19:17,099 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2023-04-01 04:19:17,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:19:17,104 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 04:19:17,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:19:17,115 INFO L225 Difference]: With dead ends: 718 [2023-04-01 04:19:17,115 INFO L226 Difference]: Without dead ends: 471 [2023-04-01 04:19:17,119 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 04:19:17,128 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 247 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-04-01 04:19:17,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 90 Invalid, 1003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-04-01 04:19:17,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-04-01 04:19:17,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 468. [2023-04-01 04:19:17,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 458 states have (on average 1.8384279475982532) internal successors, (842), 458 states have internal predecessors, (842), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-01 04:19:17,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 853 transitions. [2023-04-01 04:19:17,193 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 853 transitions. Word has length 11 [2023-04-01 04:19:17,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:19:17,193 INFO L495 AbstractCegarLoop]: Abstraction has 468 states and 853 transitions. [2023-04-01 04:19:17,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:19:17,193 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 853 transitions. [2023-04-01 04:19:17,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-01 04:19:17,194 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:19:17,194 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:19:17,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:19:17,195 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:19:17,195 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:19:17,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1303560033, now seen corresponding path program 1 times [2023-04-01 04:19:17,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:19:17,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697282462] [2023-04-01 04:19:17,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:19:17,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:19:17,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:19:17,519 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 04:19:17,519 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:19:17,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697282462] [2023-04-01 04:19:17,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697282462] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:19:17,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:19:17,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:19:17,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560524843] [2023-04-01 04:19:17,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:19:17,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:19:17,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:19:17,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:19:17,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:19:17,522 INFO L87 Difference]: Start difference. First operand 468 states and 853 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:19:18,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:19:18,939 INFO L93 Difference]: Finished difference Result 1410 states and 2605 transitions. [2023-04-01 04:19:18,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:19:18,942 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2023-04-01 04:19:18,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:19:18,947 INFO L225 Difference]: With dead ends: 1410 [2023-04-01 04:19:18,947 INFO L226 Difference]: Without dead ends: 947 [2023-04-01 04:19:18,949 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 04:19:18,950 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 889 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1247 mSolverCounterSat, 397 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 889 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 397 IncrementalHoareTripleChecker+Valid, 1247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-01 04:19:18,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [889 Valid, 43 Invalid, 1644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [397 Valid, 1247 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-01 04:19:18,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2023-04-01 04:19:18,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 924. [2023-04-01 04:19:18,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 924 states, 906 states have (on average 1.7339955849889626) internal successors, (1571), 910 states have internal predecessors, (1571), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) [2023-04-01 04:19:18,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 1604 transitions. [2023-04-01 04:19:18,983 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 1604 transitions. Word has length 22 [2023-04-01 04:19:18,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:19:18,983 INFO L495 AbstractCegarLoop]: Abstraction has 924 states and 1604 transitions. [2023-04-01 04:19:18,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:19:18,984 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 1604 transitions. [2023-04-01 04:19:18,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 04:19:18,984 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:19:18,984 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:19:18,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:19:18,985 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:19:18,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:19:18,985 INFO L85 PathProgramCache]: Analyzing trace with hash -521622252, now seen corresponding path program 1 times [2023-04-01 04:19:18,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:19:18,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948203999] [2023-04-01 04:19:18,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:19:18,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:19:19,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:19:19,068 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 04:19:19,068 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:19:19,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948203999] [2023-04-01 04:19:19,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948203999] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:19:19,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:19:19,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:19:19,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442705456] [2023-04-01 04:19:19,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:19:19,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:19:19,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:19:19,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:19:19,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:19:19,070 INFO L87 Difference]: Start difference. First operand 924 states and 1604 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 04:19:20,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:19:20,167 INFO L93 Difference]: Finished difference Result 2556 states and 4514 transitions. [2023-04-01 04:19:20,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:19:20,167 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 23 [2023-04-01 04:19:20,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:19:20,173 INFO L225 Difference]: With dead ends: 2556 [2023-04-01 04:19:20,173 INFO L226 Difference]: Without dead ends: 1637 [2023-04-01 04:19:20,175 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 04:19:20,175 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 994 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 994 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 439 IncrementalHoareTripleChecker+Valid, 1145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:19:20,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [994 Valid, 45 Invalid, 1584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [439 Valid, 1145 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-01 04:19:20,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2023-04-01 04:19:20,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1605. [2023-04-01 04:19:20,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1605 states, 1573 states have (on average 1.477431659249841) internal successors, (2324), 1583 states have internal predecessors, (2324), 11 states have call successors, (11), 11 states have call predecessors, (11), 20 states have return successors, (69), 10 states have call predecessors, (69), 10 states have call successors, (69) [2023-04-01 04:19:20,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1605 states to 1605 states and 2404 transitions. [2023-04-01 04:19:20,204 INFO L78 Accepts]: Start accepts. Automaton has 1605 states and 2404 transitions. Word has length 23 [2023-04-01 04:19:20,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:19:20,205 INFO L495 AbstractCegarLoop]: Abstraction has 1605 states and 2404 transitions. [2023-04-01 04:19:20,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 04:19:20,205 INFO L276 IsEmpty]: Start isEmpty. Operand 1605 states and 2404 transitions. [2023-04-01 04:19:20,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-04-01 04:19:20,206 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:19:20,207 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:19:20,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:19:20,207 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:19:20,207 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:19:20,207 INFO L85 PathProgramCache]: Analyzing trace with hash -451852602, now seen corresponding path program 1 times [2023-04-01 04:19:20,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:19:20,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329408995] [2023-04-01 04:19:20,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:19:20,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:19:20,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:19:20,536 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 04:19:20,536 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:19:20,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329408995] [2023-04-01 04:19:20,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329408995] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:19:20,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208145384] [2023-04-01 04:19:20,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:19:20,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:19:20,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:19:20,543 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 04:19:20,586 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 04:19:20,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:19:20,665 INFO L262 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:19:20,671 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:19:20,752 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 04:19:20,752 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 04:19:20,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208145384] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:19:20,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 04:19:20,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-04-01 04:19:20,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728939715] [2023-04-01 04:19:20,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:19:20,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:19:20,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:19:20,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:19:20,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:19:20,754 INFO L87 Difference]: Start difference. First operand 1605 states and 2404 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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 04:19:21,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:19:21,600 INFO L93 Difference]: Finished difference Result 3436 states and 5156 transitions. [2023-04-01 04:19:21,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:19:21,602 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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 92 [2023-04-01 04:19:21,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:19:21,608 INFO L225 Difference]: With dead ends: 3436 [2023-04-01 04:19:21,608 INFO L226 Difference]: Without dead ends: 1836 [2023-04-01 04:19:21,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:19:21,611 INFO L413 NwaCegarLoop]: 407 mSDtfsCounter, 237 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 04:19:21,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 423 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 04:19:21,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1836 states. [2023-04-01 04:19:21,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1836 to 1830. [2023-04-01 04:19:21,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1830 states, 1796 states have (on average 1.4387527839643652) internal successors, (2584), 1806 states have internal predecessors, (2584), 12 states have call successors, (12), 12 states have call predecessors, (12), 21 states have return successors, (81), 11 states have call predecessors, (81), 11 states have call successors, (81) [2023-04-01 04:19:21,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1830 states to 1830 states and 2677 transitions. [2023-04-01 04:19:21,647 INFO L78 Accepts]: Start accepts. Automaton has 1830 states and 2677 transitions. Word has length 92 [2023-04-01 04:19:21,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:19:21,649 INFO L495 AbstractCegarLoop]: Abstraction has 1830 states and 2677 transitions. [2023-04-01 04:19:21,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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 04:19:21,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1830 states and 2677 transitions. [2023-04-01 04:19:21,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-04-01 04:19:21,657 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:19:21,657 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:19:21,683 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 04:19:21,862 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 04:19:21,862 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:19:21,863 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:19:21,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1419450676, now seen corresponding path program 1 times [2023-04-01 04:19:21,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:19:21,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095501173] [2023-04-01 04:19:21,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:19:21,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:19:21,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:19:22,084 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 04:19:22,084 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:19:22,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095501173] [2023-04-01 04:19:22,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095501173] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:19:22,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:19:22,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:19:22,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224869518] [2023-04-01 04:19:22,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:19:22,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:19:22,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:19:22,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:19:22,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:19:22,086 INFO L87 Difference]: Start difference. First operand 1830 states and 2677 transitions. Second operand has 5 states, 5 states have (on average 25.8) internal successors, (129), 4 states have internal predecessors, (129), 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 04:19:23,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:19:23,283 INFO L93 Difference]: Finished difference Result 4851 states and 7168 transitions. [2023-04-01 04:19:23,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:19:23,287 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 4 states have internal predecessors, (129), 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 135 [2023-04-01 04:19:23,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:19:23,311 INFO L225 Difference]: With dead ends: 4851 [2023-04-01 04:19:23,312 INFO L226 Difference]: Without dead ends: 3026 [2023-04-01 04:19:23,324 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 04:19:23,327 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 570 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1293 mSolverCounterSat, 423 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 423 IncrementalHoareTripleChecker+Valid, 1293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:19:23,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 43 Invalid, 1716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [423 Valid, 1293 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-01 04:19:23,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3026 states. [2023-04-01 04:19:23,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3026 to 2976. [2023-04-01 04:19:23,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2976 states, 2911 states have (on average 1.389556853315012) internal successors, (4045), 2942 states have internal predecessors, (4045), 17 states have call successors, (17), 17 states have call predecessors, (17), 47 states have return successors, (229), 16 states have call predecessors, (229), 16 states have call successors, (229) [2023-04-01 04:19:23,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2976 states to 2976 states and 4291 transitions. [2023-04-01 04:19:23,474 INFO L78 Accepts]: Start accepts. Automaton has 2976 states and 4291 transitions. Word has length 135 [2023-04-01 04:19:23,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:19:23,475 INFO L495 AbstractCegarLoop]: Abstraction has 2976 states and 4291 transitions. [2023-04-01 04:19:23,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 4 states have internal predecessors, (129), 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 04:19:23,475 INFO L276 IsEmpty]: Start isEmpty. Operand 2976 states and 4291 transitions. [2023-04-01 04:19:23,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-04-01 04:19:23,480 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:19:23,480 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:19:23,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 04:19:23,480 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:19:23,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:19:23,481 INFO L85 PathProgramCache]: Analyzing trace with hash 450362691, now seen corresponding path program 1 times [2023-04-01 04:19:23,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:19:23,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378004025] [2023-04-01 04:19:23,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:19:23,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:19:23,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:19:23,679 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 79 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 04:19:23,679 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:19:23,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378004025] [2023-04-01 04:19:23,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378004025] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:19:23,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099914839] [2023-04-01 04:19:23,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:19:23,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:19:23,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:19:23,681 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 04:19:23,709 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 04:19:23,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:19:23,860 INFO L262 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:19:23,868 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:19:23,980 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 79 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 04:19:23,980 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:19:24,181 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 79 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 04:19:24,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099914839] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:19:24,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1239965900] [2023-04-01 04:19:24,198 INFO L159 IcfgInterpreter]: Started Sifa with 77 locations of interest [2023-04-01 04:19:24,198 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:19:24,200 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:19:24,204 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:19:24,204 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:19:24,309 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 46 for LOIs [2023-04-01 04:19:24,404 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 14 [2023-04-01 04:19:24,499 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 8580 conjuctions. This might take some time... [2023-04-01 04:19:24,715 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 348 conjuctions. [2023-04-01 04:19:39,617 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 47