/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 IntervalDomain -i ../sv-benchmarks/c/eca-rers2012/Problem13_label17.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:03:04,935 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:03:04,937 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:03:04,964 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:03:04,964 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:03:04,967 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:03:04,970 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:03:04,974 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:03:04,975 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:03:04,981 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:03:04,983 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:03:04,985 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:03:04,985 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:03:04,988 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:03:04,991 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:03:04,992 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:03:04,993 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:03:04,994 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:03:04,996 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:03:05,002 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:03:05,003 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:03:05,005 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:03:05,006 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:03:05,007 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:03:05,015 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 22:03:05,016 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 22:03:05,016 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 22:03:05,017 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 22:03:05,018 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 22:03:05,019 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 22:03:05,019 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:03:05,020 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:03:05,021 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:03:05,022 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:03:05,023 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:03:05,023 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:03:05,023 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:03:05,024 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:03:05,024 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:03:05,025 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:03:05,025 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:03:05,026 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 [2023-03-31 22:03:05,064 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:03:05,064 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:03:05,065 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:03:05,065 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:03:05,066 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:03:05,066 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:03:05,066 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:03:05,066 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:03:05,066 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:03:05,067 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:03:05,067 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:03:05,068 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:03:05,068 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:03:05,068 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:03:05,068 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:03:05,068 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:03:05,068 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:03:05,068 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:03:05,069 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:03:05,069 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:03:05,070 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:03:05,070 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:03:05,070 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:03:05,070 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:03:05,070 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:03:05,071 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:03:05,071 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:03:05,071 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:03:05,071 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:03:05,071 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:03:05,072 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:03:05,072 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:03:05,072 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:03:05,072 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:03:05,072 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:03:05,073 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:03:05,073 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:03:05,073 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:03:05,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:03:05,073 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:03:05,073 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:03:05,074 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:03:05,319 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:03:05,350 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:03:05,352 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:03:05,354 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:03:05,354 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:03:05,356 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label17.c [2023-03-31 22:03:06,576 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:03:07,037 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:03:07,037 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label17.c [2023-03-31 22:03:07,071 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90e81e45f/f178c41a856e47b5b56d8af56b392722/FLAG2fbc47eb9 [2023-03-31 22:03:07,090 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90e81e45f/f178c41a856e47b5b56d8af56b392722 [2023-03-31 22:03:07,092 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:03:07,094 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:03:07,097 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:03:07,098 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:03:07,101 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:03:07,102 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:03:07" (1/1) ... [2023-03-31 22:03:07,103 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@142f8a99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:03:07, skipping insertion in model container [2023-03-31 22:03:07,104 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:03:07" (1/1) ... [2023-03-31 22:03:07,111 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:03:07,226 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:03:07,437 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_label17.c[4917,4930] [2023-03-31 22:03:08,243 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:03:08,254 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:03:08,279 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_label17.c[4917,4930] [2023-03-31 22:03:08,808 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:03:08,832 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:03:08,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:03:08 WrapperNode [2023-03-31 22:03:08,833 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:03:08,835 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:03:08,835 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:03:08,835 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:03:08,847 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:03:08" (1/1) ... [2023-03-31 22:03:08,847 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:03:08" (1/1) ... [2023-03-31 22:03:08,933 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:03:08" (1/1) ... [2023-03-31 22:03:08,934 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:03:08" (1/1) ... [2023-03-31 22:03:09,057 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:03:08" (1/1) ... [2023-03-31 22:03:09,085 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:03:08" (1/1) ... [2023-03-31 22:03:09,120 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:03:08" (1/1) ... [2023-03-31 22:03:09,140 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:03:08" (1/1) ... [2023-03-31 22:03:09,175 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:03:09,176 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:03:09,176 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:03:09,176 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:03:09,177 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:03:08" (1/1) ... [2023-03-31 22:03:09,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:03:09,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:03:09,206 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) [2023-03-31 22:03:09,213 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 [2023-03-31 22:03:09,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:03:09,245 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:03:09,245 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:03:09,249 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 22:03:09,249 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 22:03:09,250 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-31 22:03:09,250 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-03-31 22:03:09,250 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:03:09,250 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 22:03:09,250 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 22:03:09,250 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-31 22:03:09,250 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-03-31 22:03:09,250 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:03:09,250 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:03:09,251 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:03:09,251 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:03:09,251 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:03:09,251 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:03:09,251 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:03:09,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:03:09,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:03:09,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:03:09,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:03:09,251 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:03:09,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:03:09,333 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:03:09,335 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:03:14,078 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:03:17,031 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:03:17,032 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 22:03:17,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:03:17 BoogieIcfgContainer [2023-03-31 22:03:17,037 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:03:17,040 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:03:17,040 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:03:17,043 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:03:17,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:03:07" (1/3) ... [2023-03-31 22:03:17,044 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dd0732c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:03:17, skipping insertion in model container [2023-03-31 22:03:17,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:03:08" (2/3) ... [2023-03-31 22:03:17,044 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dd0732c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:03:17, skipping insertion in model container [2023-03-31 22:03:17,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:03:17" (3/3) ... [2023-03-31 22:03:17,046 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label17.c [2023-03-31 22:03:17,063 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:03:17,063 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:03:17,249 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:03:17,255 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;@7e1908b4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:03:17,255 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:03:17,266 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) [2023-03-31 22:03:17,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 22:03:17,273 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:03:17,273 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:03:17,274 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:03:17,280 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:03:17,281 INFO L85 PathProgramCache]: Analyzing trace with hash -134419691, now seen corresponding path program 1 times [2023-03-31 22:03:17,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:03:17,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953183942] [2023-03-31 22:03:17,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:03:17,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:03:17,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:03:17,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:03:17,628 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:03:17,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953183942] [2023-03-31 22:03:17,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953183942] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:03:17,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:03:17,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:03:17,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134289042] [2023-03-31 22:03:17,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:03:17,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:03:17,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:03:17,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:03:17,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:03:17,674 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) [2023-03-31 22:03:21,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:03:21,220 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-03-31 22:03:21,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:03:21,222 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 [2023-03-31 22:03:21,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:03:21,244 INFO L225 Difference]: With dead ends: 2068 [2023-03-31 22:03:21,244 INFO L226 Difference]: Without dead ends: 1371 [2023-03-31 22:03:21,252 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 [2023-03-31 22:03:21,255 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 753 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2031 mSolverCounterSat, 1000 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 753 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 3031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1000 IncrementalHoareTripleChecker+Valid, 2031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-03-31 22:03:21,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [753 Valid, 158 Invalid, 3031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1000 Valid, 2031 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-03-31 22:03:21,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-03-31 22:03:21,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1369. [2023-03-31 22:03:21,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1369 states, 1351 states have (on average 1.8904515173945227) internal successors, (2554), 1351 states have internal predecessors, (2554), 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) [2023-03-31 22:03:21,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 2577 transitions. [2023-03-31 22:03:21,348 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 2577 transitions. Word has length 11 [2023-03-31 22:03:21,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:03:21,349 INFO L495 AbstractCegarLoop]: Abstraction has 1369 states and 2577 transitions. [2023-03-31 22:03:21,349 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) [2023-03-31 22:03:21,349 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 2577 transitions. [2023-03-31 22:03:21,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-03-31 22:03:21,351 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:03:21,351 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] [2023-03-31 22:03:21,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:03:21,351 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:03:21,352 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:03:21,352 INFO L85 PathProgramCache]: Analyzing trace with hash -71083362, now seen corresponding path program 1 times [2023-03-31 22:03:21,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:03:21,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757406088] [2023-03-31 22:03:21,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:03:21,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:03:21,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:03:21,618 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:03:21,618 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:03:21,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757406088] [2023-03-31 22:03:21,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757406088] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:03:21,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:03:21,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:03:21,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484354014] [2023-03-31 22:03:21,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:03:21,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:03:21,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:03:21,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:03:21,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:03:21,622 INFO L87 Difference]: Start difference. First operand 1369 states and 2577 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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) [2023-03-31 22:03:26,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:03:26,055 INFO L93 Difference]: Finished difference Result 4151 states and 7858 transitions. [2023-03-31 22:03:26,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:03:26,056 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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 28 [2023-03-31 22:03:26,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:03:26,074 INFO L225 Difference]: With dead ends: 4151 [2023-03-31 22:03:26,075 INFO L226 Difference]: Without dead ends: 2787 [2023-03-31 22:03:26,084 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 [2023-03-31 22:03:26,087 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 2615 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 3735 mSolverCounterSat, 1023 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2615 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 4758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1023 IncrementalHoareTripleChecker+Valid, 3735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-03-31 22:03:26,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2615 Valid, 90 Invalid, 4758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1023 Valid, 3735 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-03-31 22:03:26,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2787 states. [2023-03-31 22:03:26,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2787 to 2743. [2023-03-31 22:03:26,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2743 states, 2701 states have (on average 1.6864124398370974) internal successors, (4555), 2705 states have internal predecessors, (4555), 15 states have call successors, (15), 15 states have call predecessors, (15), 26 states have return successors, (74), 22 states have call predecessors, (74), 14 states have call successors, (74) [2023-03-31 22:03:26,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2743 states to 2743 states and 4644 transitions. [2023-03-31 22:03:26,174 INFO L78 Accepts]: Start accepts. Automaton has 2743 states and 4644 transitions. Word has length 28 [2023-03-31 22:03:26,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:03:26,174 INFO L495 AbstractCegarLoop]: Abstraction has 2743 states and 4644 transitions. [2023-03-31 22:03:26,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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) [2023-03-31 22:03:26,174 INFO L276 IsEmpty]: Start isEmpty. Operand 2743 states and 4644 transitions. [2023-03-31 22:03:26,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-03-31 22:03:26,178 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:03:26,178 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] [2023-03-31 22:03:26,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 22:03:26,178 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:03:26,179 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:03:26,179 INFO L85 PathProgramCache]: Analyzing trace with hash 2120058129, now seen corresponding path program 1 times [2023-03-31 22:03:26,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:03:26,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984104915] [2023-03-31 22:03:26,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:03:26,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:03:26,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:03:26,409 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 22:03:26,410 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:03:26,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984104915] [2023-03-31 22:03:26,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984104915] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:03:26,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316475153] [2023-03-31 22:03:26,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:03:26,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:03:26,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:03:26,431 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) [2023-03-31 22:03:26,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 22:03:26,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:03:26,551 INFO L262 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 22:03:26,556 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:03:26,643 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 22:03:26,643 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 22:03:26,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316475153] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:03:26,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 22:03:26,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-03-31 22:03:26,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421522361] [2023-03-31 22:03:26,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:03:26,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:03:26,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:03:26,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:03:26,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-31 22:03:26,645 INFO L87 Difference]: Start difference. First operand 2743 states and 4644 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 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) [2023-03-31 22:03:31,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:03:31,310 INFO L93 Difference]: Finished difference Result 8412 states and 14568 transitions. [2023-03-31 22:03:31,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:03:31,313 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 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 44 [2023-03-31 22:03:31,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:03:31,346 INFO L225 Difference]: With dead ends: 8412 [2023-03-31 22:03:31,346 INFO L226 Difference]: Without dead ends: 5674 [2023-03-31 22:03:31,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-03-31 22:03:31,356 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 2261 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 3798 mSolverCounterSat, 1516 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2261 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 5314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1516 IncrementalHoareTripleChecker+Valid, 3798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-03-31 22:03:31,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2261 Valid, 94 Invalid, 5314 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1516 Valid, 3798 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2023-03-31 22:03:31,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5674 states. [2023-03-31 22:03:31,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5674 to 5572. [2023-03-31 22:03:31,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5572 states, 5447 states have (on average 1.5008261428309162) internal successors, (8175), 5471 states have internal predecessors, (8175), 27 states have call successors, (27), 27 states have call predecessors, (27), 97 states have return successors, (430), 73 states have call predecessors, (430), 26 states have call successors, (430) [2023-03-31 22:03:31,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5572 states to 5572 states and 8632 transitions. [2023-03-31 22:03:31,554 INFO L78 Accepts]: Start accepts. Automaton has 5572 states and 8632 transitions. Word has length 44 [2023-03-31 22:03:31,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:03:31,554 INFO L495 AbstractCegarLoop]: Abstraction has 5572 states and 8632 transitions. [2023-03-31 22:03:31,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 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) [2023-03-31 22:03:31,555 INFO L276 IsEmpty]: Start isEmpty. Operand 5572 states and 8632 transitions. [2023-03-31 22:03:31,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-03-31 22:03:31,564 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:03:31,565 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2023-03-31 22:03:31,574 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-03-31 22:03:31,771 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 [2023-03-31 22:03:31,771 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:03:31,772 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:03:31,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1371524845, now seen corresponding path program 1 times [2023-03-31 22:03:31,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:03:31,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424789942] [2023-03-31 22:03:31,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:03:31,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:03:31,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:03:32,211 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 22:03:32,212 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:03:32,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424789942] [2023-03-31 22:03:32,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424789942] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:03:32,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713519528] [2023-03-31 22:03:32,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:03:32,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:03:32,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:03:32,217 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) [2023-03-31 22:03:32,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 22:03:32,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:03:32,331 INFO L262 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 22:03:32,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:03:32,426 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 22:03:32,427 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 22:03:32,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713519528] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:03:32,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 22:03:32,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-03-31 22:03:32,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358462726] [2023-03-31 22:03:32,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:03:32,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:03:32,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:03:32,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:03:32,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:03:32,433 INFO L87 Difference]: Start difference. First operand 5572 states and 8632 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 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) [2023-03-31 22:03:36,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:03:36,138 INFO L93 Difference]: Finished difference Result 16831 states and 27251 transitions. [2023-03-31 22:03:36,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 22:03:36,139 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 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 58 [2023-03-31 22:03:36,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:03:36,189 INFO L225 Difference]: With dead ends: 16831 [2023-03-31 22:03:36,189 INFO L226 Difference]: Without dead ends: 11264 [2023-03-31 22:03:36,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-03-31 22:03:36,210 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 2398 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 3486 mSolverCounterSat, 1263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2398 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 4749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1263 IncrementalHoareTripleChecker+Valid, 3486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-03-31 22:03:36,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2398 Valid, 73 Invalid, 4749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1263 Valid, 3486 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-03-31 22:03:36,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11264 states. [2023-03-31 22:03:36,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11264 to 9568. [2023-03-31 22:03:36,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9568 states, 9297 states have (on average 1.372915994406798) internal successors, (12764), 9365 states have internal predecessors, (12764), 45 states have call successors, (45), 45 states have call predecessors, (45), 225 states have return successors, (1341), 157 states have call predecessors, (1341), 44 states have call successors, (1341) [2023-03-31 22:03:36,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9568 states to 9568 states and 14150 transitions. [2023-03-31 22:03:36,577 INFO L78 Accepts]: Start accepts. Automaton has 9568 states and 14150 transitions. Word has length 58 [2023-03-31 22:03:36,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:03:36,577 INFO L495 AbstractCegarLoop]: Abstraction has 9568 states and 14150 transitions. [2023-03-31 22:03:36,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 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) [2023-03-31 22:03:36,578 INFO L276 IsEmpty]: Start isEmpty. Operand 9568 states and 14150 transitions. [2023-03-31 22:03:36,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-03-31 22:03:36,579 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:03:36,579 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] [2023-03-31 22:03:36,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 22:03:36,784 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 [2023-03-31 22:03:36,785 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:03:36,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:03:36,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1006507262, now seen corresponding path program 1 times [2023-03-31 22:03:36,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:03:36,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33554199] [2023-03-31 22:03:36,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:03:36,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:03:36,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:03:36,976 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:03:36,977 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:03:36,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33554199] [2023-03-31 22:03:36,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33554199] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:03:36,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:03:36,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:03:36,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159899979] [2023-03-31 22:03:36,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:03:36,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:03:36,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:03:36,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:03:36,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:03:36,978 INFO L87 Difference]: Start difference. First operand 9568 states and 14150 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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) [2023-03-31 22:03:41,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:03:41,450 INFO L93 Difference]: Finished difference Result 28986 states and 46124 transitions. [2023-03-31 22:03:41,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:03:41,451 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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 59 [2023-03-31 22:03:41,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:03:41,536 INFO L225 Difference]: With dead ends: 28986 [2023-03-31 22:03:41,536 INFO L226 Difference]: Without dead ends: 19423 [2023-03-31 22:03:41,560 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 [2023-03-31 22:03:41,563 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 2051 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 4550 mSolverCounterSat, 757 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2051 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 5307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 757 IncrementalHoareTripleChecker+Valid, 4550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-03-31 22:03:41,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2051 Valid, 116 Invalid, 5307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [757 Valid, 4550 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-03-31 22:03:41,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19423 states. [2023-03-31 22:03:41,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19423 to 19157. [2023-03-31 22:03:42,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19157 states, 18555 states have (on average 1.3611964430072756) internal successors, (25257), 18737 states have internal predecessors, (25257), 87 states have call successors, (87), 87 states have call predecessors, (87), 514 states have return successors, (4751), 332 states have call predecessors, (4751), 86 states have call successors, (4751) [2023-03-31 22:03:42,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19157 states to 19157 states and 30095 transitions. [2023-03-31 22:03:42,076 INFO L78 Accepts]: Start accepts. Automaton has 19157 states and 30095 transitions. Word has length 59 [2023-03-31 22:03:42,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:03:42,077 INFO L495 AbstractCegarLoop]: Abstraction has 19157 states and 30095 transitions. [2023-03-31 22:03:42,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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) [2023-03-31 22:03:42,077 INFO L276 IsEmpty]: Start isEmpty. Operand 19157 states and 30095 transitions. [2023-03-31 22:03:42,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-03-31 22:03:42,080 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:03:42,080 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, 1, 1] [2023-03-31 22:03:42,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-03-31 22:03:42,081 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:03:42,081 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:03:42,081 INFO L85 PathProgramCache]: Analyzing trace with hash 578804464, now seen corresponding path program 1 times [2023-03-31 22:03:42,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:03:42,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116182276] [2023-03-31 22:03:42,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:03:42,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:03:42,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:03:42,301 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-03-31 22:03:42,301 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:03:42,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116182276] [2023-03-31 22:03:42,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116182276] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:03:42,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495932674] [2023-03-31 22:03:42,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:03:42,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:03:42,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:03:42,305 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) [2023-03-31 22:03:42,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 22:03:42,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:03:42,440 INFO L262 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 22:03:42,448 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:03:42,509 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-03-31 22:03:42,510 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 22:03:42,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495932674] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:03:42,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 22:03:42,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-03-31 22:03:42,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475948141] [2023-03-31 22:03:42,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:03:42,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:03:42,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:03:42,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:03:42,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:03:42,513 INFO L87 Difference]: Start difference. First operand 19157 states and 30095 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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) [2023-03-31 22:03:46,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:03:46,965 INFO L93 Difference]: Finished difference Result 48382 states and 79343 transitions. [2023-03-31 22:03:46,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 22:03:46,966 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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 81 [2023-03-31 22:03:46,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:03:47,207 INFO L225 Difference]: With dead ends: 48382 [2023-03-31 22:03:47,207 INFO L226 Difference]: Without dead ends: 29230 [2023-03-31 22:03:47,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-03-31 22:03:47,254 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 2040 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 4472 mSolverCounterSat, 943 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2040 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 5415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 943 IncrementalHoareTripleChecker+Valid, 4472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-03-31 22:03:47,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2040 Valid, 103 Invalid, 5415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [943 Valid, 4472 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-03-31 22:03:47,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29230 states. [2023-03-31 22:03:47,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29230 to 28623. [2023-03-31 22:03:47,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28623 states, 27698 states have (on average 1.2740270055599683) internal successors, (35288), 27999 states have internal predecessors, (35288), 129 states have call successors, (129), 129 states have call predecessors, (129), 795 states have return successors, (8591), 494 states have call predecessors, (8591), 128 states have call successors, (8591) [2023-03-31 22:03:48,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28623 states to 28623 states and 44008 transitions. [2023-03-31 22:03:48,007 INFO L78 Accepts]: Start accepts. Automaton has 28623 states and 44008 transitions. Word has length 81 [2023-03-31 22:03:48,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:03:48,007 INFO L495 AbstractCegarLoop]: Abstraction has 28623 states and 44008 transitions. [2023-03-31 22:03:48,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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) [2023-03-31 22:03:48,008 INFO L276 IsEmpty]: Start isEmpty. Operand 28623 states and 44008 transitions. [2023-03-31 22:03:48,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-03-31 22:03:48,010 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:03:48,010 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:03:48,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 22:03:48,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:03:48,219 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:03:48,219 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:03:48,220 INFO L85 PathProgramCache]: Analyzing trace with hash -937620359, now seen corresponding path program 1 times [2023-03-31 22:03:48,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:03:48,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931448274] [2023-03-31 22:03:48,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:03:48,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:03:48,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:03:48,472 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2023-03-31 22:03:48,472 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:03:48,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931448274] [2023-03-31 22:03:48,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931448274] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:03:48,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:03:48,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:03:48,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246793234] [2023-03-31 22:03:48,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:03:48,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:03:48,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:03:48,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:03:48,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:03:48,474 INFO L87 Difference]: Start difference. First operand 28623 states and 44008 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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) [2023-03-31 22:03:51,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:03:51,720 INFO L93 Difference]: Finished difference Result 64700 states and 104556 transitions. [2023-03-31 22:03:51,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:03:51,721 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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 115 [2023-03-31 22:03:51,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:03:51,862 INFO L225 Difference]: With dead ends: 64700 [2023-03-31 22:03:51,863 INFO L226 Difference]: Without dead ends: 36082 [2023-03-31 22:03:51,927 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 [2023-03-31 22:03:51,928 INFO L413 NwaCegarLoop]: 957 mSDtfsCounter, 852 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 2069 mSolverCounterSat, 654 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 852 SdHoareTripleChecker+Valid, 985 SdHoareTripleChecker+Invalid, 2723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 654 IncrementalHoareTripleChecker+Valid, 2069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-03-31 22:03:51,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [852 Valid, 985 Invalid, 2723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [654 Valid, 2069 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-03-31 22:03:51,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36082 states. [2023-03-31 22:03:52,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36082 to 35832. [2023-03-31 22:03:52,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35832 states, 34849 states have (on average 1.2471233033946454) internal successors, (43461), 35151 states have internal predecessors, (43461), 162 states have call successors, (162), 162 states have call predecessors, (162), 820 states have return successors, (10236), 518 states have call predecessors, (10236), 161 states have call successors, (10236) [2023-03-31 22:03:52,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35832 states to 35832 states and 53859 transitions. [2023-03-31 22:03:52,876 INFO L78 Accepts]: Start accepts. Automaton has 35832 states and 53859 transitions. Word has length 115 [2023-03-31 22:03:52,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:03:52,876 INFO L495 AbstractCegarLoop]: Abstraction has 35832 states and 53859 transitions. [2023-03-31 22:03:52,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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) [2023-03-31 22:03:52,876 INFO L276 IsEmpty]: Start isEmpty. Operand 35832 states and 53859 transitions. [2023-03-31 22:03:52,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-03-31 22:03:52,880 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:03:52,880 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:03:52,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-03-31 22:03:52,880 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:03:52,883 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:03:52,883 INFO L85 PathProgramCache]: Analyzing trace with hash -829170847, now seen corresponding path program 1 times [2023-03-31 22:03:52,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:03:52,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129955243] [2023-03-31 22:03:52,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:03:52,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:03:52,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:03:53,076 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 92 proven. 2 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-03-31 22:03:53,077 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:03:53,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129955243] [2023-03-31 22:03:53,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129955243] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:03:53,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31893437] [2023-03-31 22:03:53,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:03:53,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:03:53,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:03:53,081 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:03:53,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 22:03:53,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:03:53,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 723 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 22:03:53,234 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:03:53,325 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 92 proven. 2 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-03-31 22:03:53,325 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:03:53,524 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 92 proven. 2 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-03-31 22:03:53,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31893437] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:03:53,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [827450134] [2023-03-31 22:03:53,547 INFO L159 IcfgInterpreter]: Started Sifa with 55 locations of interest [2023-03-31 22:03:53,547 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:03:53,550 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:03:53,554 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:03:53,555 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:03:53,685 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 49 for LOIs [2023-03-31 22:03:53,828 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 27 [2023-03-31 22:03:54,261 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 34 [2023-03-31 22:03:54,469 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 6944 conjuctions. This might take some time... [2023-03-31 22:03:54,567 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 75 conjuctions. [2023-03-31 22:03:56,004 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 56 for LOIs [2023-03-31 22:03:56,120 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 28 [2023-03-31 22:03:56,566 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 21130 conjuctions. This might take some time...