/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/Problem13_label58.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 19:35:26,944 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 19:35:26,945 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 19:35:26,971 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 19:35:26,972 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 19:35:26,973 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 19:35:26,974 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 19:35:26,975 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 19:35:26,976 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 19:35:26,977 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 19:35:26,978 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 19:35:26,978 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 19:35:26,979 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 19:35:26,980 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 19:35:26,980 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 19:35:26,981 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 19:35:26,982 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 19:35:26,983 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 19:35:26,984 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 19:35:26,986 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 19:35:26,987 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 19:35:26,988 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 19:35:26,989 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 19:35:26,989 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 19:35:26,992 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 19:35:26,993 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 19:35:26,993 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 19:35:26,994 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 19:35:26,994 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 19:35:26,995 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 19:35:26,995 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 19:35:26,996 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 19:35:26,997 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 19:35:26,997 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 19:35:26,998 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 19:35:26,998 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 19:35:26,999 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 19:35:26,999 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 19:35:26,999 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 19:35:27,000 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 19:35:27,000 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 19:35:27,005 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 [2023-04-02 19:35:27,034 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 19:35:27,034 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 19:35:27,034 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 19:35:27,034 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 19:35:27,035 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 19:35:27,035 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 19:35:27,035 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 19:35:27,035 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 19:35:27,035 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 19:35:27,036 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 19:35:27,036 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 19:35:27,036 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 19:35:27,036 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 19:35:27,036 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 19:35:27,036 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 19:35:27,036 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 19:35:27,036 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 19:35:27,036 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 19:35:27,037 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 19:35:27,037 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 19:35:27,037 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 19:35:27,037 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 19:35:27,037 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 19:35:27,038 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 19:35:27,038 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 19:35:27,038 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 19:35:27,038 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 19:35:27,038 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 19:35:27,038 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 19:35:27,038 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 19:35:27,038 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 19:35:27,038 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 19:35:27,039 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 19:35:27,039 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 19:35:27,039 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 19:35:27,039 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 19:35:27,039 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 19:35:27,039 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 19:35:27,039 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 19:35:27,039 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 19:35:27,040 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 19:35:27,040 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 19:35:27,232 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 19:35:27,252 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 19:35:27,254 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 19:35:27,255 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 19:35:27,256 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 19:35:27,257 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label58.c [2023-04-02 19:35:28,435 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 19:35:28,890 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 19:35:28,891 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label58.c [2023-04-02 19:35:28,926 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cf33e51d/b540007e06744418ae67eb7f44313360/FLAG57734de8a [2023-04-02 19:35:28,942 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cf33e51d/b540007e06744418ae67eb7f44313360 [2023-04-02 19:35:28,944 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 19:35:28,947 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 19:35:28,950 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 19:35:28,950 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 19:35:28,953 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 19:35:28,954 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 07:35:28" (1/1) ... [2023-04-02 19:35:28,955 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b01ba02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:35:28, skipping insertion in model container [2023-04-02 19:35:28,956 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 07:35:28" (1/1) ... [2023-04-02 19:35:28,963 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 19:35:29,091 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 19:35:29,308 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/Problem13_label58.c[2071,2084] [2023-04-02 19:35:30,204 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 19:35:30,214 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 19:35:30,236 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/Problem13_label58.c[2071,2084] [2023-04-02 19:35:30,714 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 19:35:30,736 INFO L208 MainTranslator]: Completed translation [2023-04-02 19:35:30,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:35:30 WrapperNode [2023-04-02 19:35:30,737 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 19:35:30,739 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 19:35:30,739 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 19:35:30,739 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 19:35:30,750 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:35:30" (1/1) ... [2023-04-02 19:35:30,750 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:35:30" (1/1) ... [2023-04-02 19:35:30,825 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:35:30" (1/1) ... [2023-04-02 19:35:30,825 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:35:30" (1/1) ... [2023-04-02 19:35:30,938 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:35:30" (1/1) ... [2023-04-02 19:35:30,965 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:35:30" (1/1) ... [2023-04-02 19:35:30,992 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:35:30" (1/1) ... [2023-04-02 19:35:31,007 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:35:30" (1/1) ... [2023-04-02 19:35:31,060 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 19:35:31,061 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 19:35:31,061 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 19:35:31,062 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 19:35:31,063 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:35:30" (1/1) ... [2023-04-02 19:35:31,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 19:35:31,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 19:35:31,093 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) [2023-04-02 19:35:31,097 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 [2023-04-02 19:35:31,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 19:35:31,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 19:35:31,132 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 19:35:31,132 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-02 19:35:31,132 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-02 19:35:31,133 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-02 19:35:31,133 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-02 19:35:31,133 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 19:35:31,133 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-02 19:35:31,133 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-02 19:35:31,133 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-02 19:35:31,133 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-02 19:35:31,133 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 19:35:31,133 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 19:35:31,134 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 19:35:31,134 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 19:35:31,134 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 19:35:31,134 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 19:35:31,134 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 19:35:31,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 19:35:31,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 19:35:31,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 19:35:31,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 19:35:31,135 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 19:35:31,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 19:35:31,203 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 19:35:31,204 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 19:35:36,083 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 19:35:39,038 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 19:35:39,039 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 19:35:39,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 07:35:39 BoogieIcfgContainer [2023-04-02 19:35:39,044 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 19:35:39,047 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 19:35:39,047 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 19:35:39,050 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 19:35:39,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 07:35:28" (1/3) ... [2023-04-02 19:35:39,051 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fc85cb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 07:35:39, skipping insertion in model container [2023-04-02 19:35:39,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:35:30" (2/3) ... [2023-04-02 19:35:39,051 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fc85cb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 07:35:39, skipping insertion in model container [2023-04-02 19:35:39,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 07:35:39" (3/3) ... [2023-04-02 19:35:39,052 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label58.c [2023-04-02 19:35:39,069 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 19:35:39,069 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 19:35:39,126 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 19:35:39,132 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;@4e1c9b65, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 19:35:39,132 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 19:35:39,139 INFO L276 IsEmpty]: Start isEmpty. Operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 19:35:39,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-02 19:35:39,146 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:35:39,146 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 19:35:39,147 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:35:39,152 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:35:39,153 INFO L85 PathProgramCache]: Analyzing trace with hash -330938572, now seen corresponding path program 1 times [2023-04-02 19:35:39,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:35:39,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158479564] [2023-04-02 19:35:39,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:35:39,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:35:39,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:35:39,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 19:35:39,521 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:35:39,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158479564] [2023-04-02 19:35:39,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158479564] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:35:39,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 19:35:39,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 19:35:39,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989527704] [2023-04-02 19:35:39,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:35:39,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 19:35:39,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:35:39,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 19:35:39,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 19:35:39,570 INFO L87 Difference]: Start difference. First operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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) [2023-04-02 19:35:42,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:35:42,995 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-04-02 19:35:42,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 19:35:42,999 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 [2023-04-02 19:35:42,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:35:43,020 INFO L225 Difference]: With dead ends: 2068 [2023-04-02 19:35:43,020 INFO L226 Difference]: Without dead ends: 1371 [2023-04-02 19:35:43,026 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 [2023-04-02 19:35:43,029 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 831 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2080 mSolverCounterSat, 650 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 831 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 2730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 650 IncrementalHoareTripleChecker+Valid, 2080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-04-02 19:35:43,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [831 Valid, 305 Invalid, 2730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [650 Valid, 2080 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-04-02 19:35:43,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-04-02 19:35:43,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1369. [2023-04-02 19:35:43,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1369 states, 1351 states have (on average 1.7535159141376757) internal successors, (2369), 1351 states have internal predecessors, (2369), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2023-04-02 19:35:43,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 2392 transitions. [2023-04-02 19:35:43,157 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 2392 transitions. Word has length 11 [2023-04-02 19:35:43,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:35:43,157 INFO L495 AbstractCegarLoop]: Abstraction has 1369 states and 2392 transitions. [2023-04-02 19:35:43,157 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) [2023-04-02 19:35:43,157 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 2392 transitions. [2023-04-02 19:35:43,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-02 19:35:43,159 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:35:43,159 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] [2023-04-02 19:35:43,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 19:35:43,159 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:35:43,160 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:35:43,160 INFO L85 PathProgramCache]: Analyzing trace with hash -699074039, now seen corresponding path program 1 times [2023-04-02 19:35:43,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:35:43,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373148862] [2023-04-02 19:35:43,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:35:43,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:35:43,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:35:43,369 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 19:35:43,370 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:35:43,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373148862] [2023-04-02 19:35:43,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373148862] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:35:43,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 19:35:43,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 19:35:43,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466759263] [2023-04-02 19:35:43,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:35:43,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 19:35:43,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:35:43,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 19:35:43,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 19:35:43,373 INFO L87 Difference]: Start difference. First operand 1369 states and 2392 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 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) [2023-04-02 19:35:48,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:35:48,588 INFO L93 Difference]: Finished difference Result 4183 states and 7346 transitions. [2023-04-02 19:35:48,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 19:35:48,589 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 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 27 [2023-04-02 19:35:48,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:35:48,607 INFO L225 Difference]: With dead ends: 4183 [2023-04-02 19:35:48,612 INFO L226 Difference]: Without dead ends: 2819 [2023-04-02 19:35:48,624 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 [2023-04-02 19:35:48,627 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 2235 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 4324 mSolverCounterSat, 1090 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2235 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 5414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1090 IncrementalHoareTripleChecker+Valid, 4324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2023-04-02 19:35:48,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2235 Valid, 140 Invalid, 5414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1090 Valid, 4324 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2023-04-02 19:35:48,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2819 states. [2023-04-02 19:35:48,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2819 to 2751. [2023-04-02 19:35:48,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2751 states, 2708 states have (on average 1.5535450516986706) internal successors, (4207), 2713 states have internal predecessors, (4207), 15 states have call successors, (15), 15 states have call predecessors, (15), 27 states have return successors, (75), 22 states have call predecessors, (75), 14 states have call successors, (75) [2023-04-02 19:35:48,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2751 states to 2751 states and 4297 transitions. [2023-04-02 19:35:48,763 INFO L78 Accepts]: Start accepts. Automaton has 2751 states and 4297 transitions. Word has length 27 [2023-04-02 19:35:48,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:35:48,764 INFO L495 AbstractCegarLoop]: Abstraction has 2751 states and 4297 transitions. [2023-04-02 19:35:48,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 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) [2023-04-02 19:35:48,764 INFO L276 IsEmpty]: Start isEmpty. Operand 2751 states and 4297 transitions. [2023-04-02 19:35:48,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-02 19:35:48,765 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:35:48,766 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 19:35:48,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 19:35:48,766 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:35:48,766 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:35:48,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1297497457, now seen corresponding path program 1 times [2023-04-02 19:35:48,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:35:48,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799818477] [2023-04-02 19:35:48,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:35:48,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:35:48,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:35:49,036 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 19:35:49,037 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:35:49,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799818477] [2023-04-02 19:35:49,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799818477] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 19:35:49,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879327049] [2023-04-02 19:35:49,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:35:49,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 19:35:49,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 19:35:49,045 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) [2023-04-02 19:35:49,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 19:35:49,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:35:49,148 INFO L262 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 19:35:49,153 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 19:35:49,293 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 19:35:49,293 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 19:35:49,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879327049] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:35:49,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 19:35:49,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-02 19:35:49,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441184774] [2023-04-02 19:35:49,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:35:49,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 19:35:49,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:35:49,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 19:35:49,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-02 19:35:49,295 INFO L87 Difference]: Start difference. First operand 2751 states and 4297 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 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) [2023-04-02 19:35:53,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:35:53,194 INFO L93 Difference]: Finished difference Result 8315 states and 13249 transitions. [2023-04-02 19:35:53,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 19:35:53,195 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 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 42 [2023-04-02 19:35:53,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:35:53,225 INFO L225 Difference]: With dead ends: 8315 [2023-04-02 19:35:53,225 INFO L226 Difference]: Without dead ends: 5569 [2023-04-02 19:35:53,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-04-02 19:35:53,236 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 2242 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 3632 mSolverCounterSat, 1229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2242 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 4861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1229 IncrementalHoareTripleChecker+Valid, 3632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-04-02 19:35:53,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2242 Valid, 74 Invalid, 4861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1229 Valid, 3632 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-04-02 19:35:53,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5569 states. [2023-04-02 19:35:53,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5569 to 4881. [2023-04-02 19:35:53,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4881 states, 4780 states have (on average 1.401255230125523) internal successors, (6698), 4799 states have internal predecessors, (6698), 25 states have call successors, (25), 25 states have call predecessors, (25), 75 states have return successors, (310), 56 states have call predecessors, (310), 24 states have call successors, (310) [2023-04-02 19:35:53,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4881 states to 4881 states and 7033 transitions. [2023-04-02 19:35:53,387 INFO L78 Accepts]: Start accepts. Automaton has 4881 states and 7033 transitions. Word has length 42 [2023-04-02 19:35:53,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:35:53,388 INFO L495 AbstractCegarLoop]: Abstraction has 4881 states and 7033 transitions. [2023-04-02 19:35:53,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 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) [2023-04-02 19:35:53,388 INFO L276 IsEmpty]: Start isEmpty. Operand 4881 states and 7033 transitions. [2023-04-02 19:35:53,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-02 19:35:53,392 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:35:53,393 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 19:35:53,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 19:35:53,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 19:35:53,600 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:35:53,600 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:35:53,600 INFO L85 PathProgramCache]: Analyzing trace with hash 280880410, now seen corresponding path program 1 times [2023-04-02 19:35:53,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:35:53,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933862980] [2023-04-02 19:35:53,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:35:53,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:35:53,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:35:53,804 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 19:35:53,804 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:35:53,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933862980] [2023-04-02 19:35:53,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933862980] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 19:35:53,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969693766] [2023-04-02 19:35:53,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:35:53,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 19:35:53,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 19:35:53,808 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) [2023-04-02 19:35:53,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 19:35:53,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:35:53,913 INFO L262 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 19:35:53,916 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 19:35:53,988 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 19:35:53,988 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 19:35:53,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969693766] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:35:53,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 19:35:53,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-02 19:35:53,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676074787] [2023-04-02 19:35:53,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:35:53,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 19:35:53,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:35:53,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 19:35:53,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-02 19:35:53,991 INFO L87 Difference]: Start difference. First operand 4881 states and 7033 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 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) [2023-04-02 19:35:58,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:35:58,436 INFO L93 Difference]: Finished difference Result 14889 states and 22206 transitions. [2023-04-02 19:35:58,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 19:35:58,437 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 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 45 [2023-04-02 19:35:58,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:35:58,484 INFO L225 Difference]: With dead ends: 14889 [2023-04-02 19:35:58,484 INFO L226 Difference]: Without dead ends: 10013 [2023-04-02 19:35:58,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-04-02 19:35:58,499 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 2040 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 4472 mSolverCounterSat, 1062 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2040 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 5534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1062 IncrementalHoareTripleChecker+Valid, 4472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-04-02 19:35:58,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2040 Valid, 103 Invalid, 5534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1062 Valid, 4472 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-04-02 19:35:58,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10013 states. [2023-04-02 19:35:58,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10013 to 9632. [2023-04-02 19:35:58,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9632 states, 9369 states have (on average 1.2526416906820366) internal successors, (11736), 9434 states have internal predecessors, (11736), 46 states have call successors, (46), 46 states have call predecessors, (46), 216 states have return successors, (1129), 151 states have call predecessors, (1129), 45 states have call successors, (1129) [2023-04-02 19:35:58,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9632 states to 9632 states and 12911 transitions. [2023-04-02 19:35:58,735 INFO L78 Accepts]: Start accepts. Automaton has 9632 states and 12911 transitions. Word has length 45 [2023-04-02 19:35:58,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:35:58,735 INFO L495 AbstractCegarLoop]: Abstraction has 9632 states and 12911 transitions. [2023-04-02 19:35:58,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 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) [2023-04-02 19:35:58,735 INFO L276 IsEmpty]: Start isEmpty. Operand 9632 states and 12911 transitions. [2023-04-02 19:35:58,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-04-02 19:35:58,742 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:35:58,744 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-02 19:35:58,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 19:35:58,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-04-02 19:35:58,950 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:35:58,951 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:35:58,951 INFO L85 PathProgramCache]: Analyzing trace with hash -444389621, now seen corresponding path program 1 times [2023-04-02 19:35:58,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:35:58,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650282340] [2023-04-02 19:35:58,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:35:58,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:35:59,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:35:59,206 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-04-02 19:35:59,206 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:35:59,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650282340] [2023-04-02 19:35:59,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650282340] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:35:59,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 19:35:59,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 19:35:59,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585429450] [2023-04-02 19:35:59,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:35:59,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 19:35:59,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:35:59,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 19:35:59,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 19:35:59,208 INFO L87 Difference]: Start difference. First operand 9632 states and 12911 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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) [2023-04-02 19:36:02,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:36:02,287 INFO L93 Difference]: Finished difference Result 24099 states and 34047 transitions. [2023-04-02 19:36:02,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 19:36:02,288 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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 79 [2023-04-02 19:36:02,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:36:02,348 INFO L225 Difference]: With dead ends: 24099 [2023-04-02 19:36:02,348 INFO L226 Difference]: Without dead ends: 14472 [2023-04-02 19:36:02,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 19:36:02,375 INFO L413 NwaCegarLoop]: 1207 mSDtfsCounter, 677 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 2223 mSolverCounterSat, 640 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 677 SdHoareTripleChecker+Valid, 1235 SdHoareTripleChecker+Invalid, 2863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 640 IncrementalHoareTripleChecker+Valid, 2223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-04-02 19:36:02,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [677 Valid, 1235 Invalid, 2863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [640 Valid, 2223 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-04-02 19:36:02,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14472 states. [2023-04-02 19:36:02,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14472 to 14268. [2023-04-02 19:36:02,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14268 states, 13923 states have (on average 1.2073547367665014) internal successors, (16810), 14004 states have internal predecessors, (16810), 67 states have call successors, (67), 67 states have call predecessors, (67), 277 states have return successors, (1951), 196 states have call predecessors, (1951), 66 states have call successors, (1951) [2023-04-02 19:36:02,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14268 states to 14268 states and 18828 transitions. [2023-04-02 19:36:02,822 INFO L78 Accepts]: Start accepts. Automaton has 14268 states and 18828 transitions. Word has length 79 [2023-04-02 19:36:02,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:36:02,823 INFO L495 AbstractCegarLoop]: Abstraction has 14268 states and 18828 transitions. [2023-04-02 19:36:02,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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) [2023-04-02 19:36:02,823 INFO L276 IsEmpty]: Start isEmpty. Operand 14268 states and 18828 transitions. [2023-04-02 19:36:02,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-04-02 19:36:02,825 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:36:02,825 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-02 19:36:02,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-02 19:36:02,825 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:36:02,831 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:36:02,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1624739590, now seen corresponding path program 1 times [2023-04-02 19:36:02,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:36:02,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592483855] [2023-04-02 19:36:02,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:36:02,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:36:02,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:36:03,166 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-04-02 19:36:03,166 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:36:03,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592483855] [2023-04-02 19:36:03,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592483855] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:36:03,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 19:36:03,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 19:36:03,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520555901] [2023-04-02 19:36:03,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:36:03,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 19:36:03,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:36:03,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 19:36:03,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 19:36:03,168 INFO L87 Difference]: Start difference. First operand 14268 states and 18828 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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) [2023-04-02 19:36:06,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:36:06,176 INFO L93 Difference]: Finished difference Result 36439 states and 49614 transitions. [2023-04-02 19:36:06,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 19:36:06,178 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 93 [2023-04-02 19:36:06,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:36:06,264 INFO L225 Difference]: With dead ends: 36439 [2023-04-02 19:36:06,264 INFO L226 Difference]: Without dead ends: 22176 [2023-04-02 19:36:06,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 19:36:06,304 INFO L413 NwaCegarLoop]: 1119 mSDtfsCounter, 681 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 2476 mSolverCounterSat, 456 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 681 SdHoareTripleChecker+Valid, 1146 SdHoareTripleChecker+Invalid, 2932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 456 IncrementalHoareTripleChecker+Valid, 2476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-04-02 19:36:06,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [681 Valid, 1146 Invalid, 2932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [456 Valid, 2476 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-04-02 19:36:06,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22176 states. [2023-04-02 19:36:06,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22176 to 21568. [2023-04-02 19:36:06,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21568 states, 21117 states have (on average 1.1921200928162143) internal successors, (25174), 21219 states have internal predecessors, (25174), 101 states have call successors, (101), 101 states have call predecessors, (101), 349 states have return successors, (3392), 247 states have call predecessors, (3392), 100 states have call successors, (3392) [2023-04-02 19:36:06,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21568 states to 21568 states and 28667 transitions. [2023-04-02 19:36:06,769 INFO L78 Accepts]: Start accepts. Automaton has 21568 states and 28667 transitions. Word has length 93 [2023-04-02 19:36:06,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:36:06,769 INFO L495 AbstractCegarLoop]: Abstraction has 21568 states and 28667 transitions. [2023-04-02 19:36:06,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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) [2023-04-02 19:36:06,770 INFO L276 IsEmpty]: Start isEmpty. Operand 21568 states and 28667 transitions. [2023-04-02 19:36:06,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-04-02 19:36:06,771 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:36:06,772 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2023-04-02 19:36:06,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-02 19:36:06,772 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:36:06,772 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:36:06,772 INFO L85 PathProgramCache]: Analyzing trace with hash -539060678, now seen corresponding path program 1 times [2023-04-02 19:36:06,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:36:06,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22471362] [2023-04-02 19:36:06,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:36:06,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:36:06,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:36:06,971 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 75 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-02 19:36:06,972 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:36:06,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22471362] [2023-04-02 19:36:06,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22471362] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 19:36:06,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327018811] [2023-04-02 19:36:06,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:36:06,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 19:36:06,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 19:36:06,978 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 19:36:07,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 19:36:07,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:36:07,212 INFO L262 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 19:36:07,220 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 19:36:07,278 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 75 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-02 19:36:07,279 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 19:36:07,411 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 75 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-02 19:36:07,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327018811] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 19:36:07,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1324179162] [2023-04-02 19:36:07,433 INFO L159 IcfgInterpreter]: Started Sifa with 41 locations of interest [2023-04-02 19:36:07,433 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 19:36:07,436 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 19:36:07,441 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 19:36:07,441 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 19:36:07,592 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 49 for LOIs [2023-04-02 19:36:07,715 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-02 19:36:37,504 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 55