/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/Problem19_label51.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:33:15,956 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:33:15,958 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:33:15,995 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:33:15,996 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:33:15,999 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:33:16,002 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:33:16,005 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:33:16,006 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:33:16,011 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:33:16,013 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:33:16,015 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:33:16,015 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:33:16,017 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:33:16,018 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:33:16,019 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:33:16,019 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:33:16,020 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:33:16,021 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:33:16,022 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:33:16,023 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:33:16,024 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:33:16,025 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:33:16,026 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:33:16,028 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:33:16,029 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:33:16,029 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:33:16,030 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:33:16,030 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:33:16,031 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:33:16,031 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:33:16,031 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:33:16,032 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:33:16,033 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:33:16,033 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:33:16,034 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:33:16,034 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:33:16,034 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:33:16,035 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:33:16,035 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:33:16,036 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:33:16,041 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 04:33:16,068 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:33:16,069 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:33:16,069 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:33:16,069 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:33:16,070 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:33:16,070 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:33:16,070 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:33:16,071 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:33:16,071 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:33:16,071 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:33:16,071 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:33:16,072 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:33:16,072 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:33:16,072 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:33:16,072 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:33:16,072 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:33:16,072 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:33:16,072 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:33:16,073 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:33:16,073 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:33:16,073 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:33:16,073 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:33:16,073 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:33:16,073 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:33:16,074 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:33:16,074 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:33:16,074 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:33:16,074 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:33:16,074 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:33:16,074 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:33:16,075 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:33:16,075 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:33:16,075 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:33:16,075 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:33:16,075 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:33:16,075 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:33:16,075 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:33:16,076 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:33:16,076 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:33:16,076 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:33:16,076 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:33:16,076 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:33:16,265 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:33:16,283 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:33:16,285 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:33:16,286 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:33:16,286 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:33:16,288 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label51.c [2023-04-01 04:33:17,391 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:33:17,933 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:33:17,934 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label51.c [2023-04-01 04:33:17,981 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53652402a/a35dade8fe49418c9609b168c7a813b3/FLAGdc6b25b8c [2023-04-01 04:33:17,996 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53652402a/a35dade8fe49418c9609b168c7a813b3 [2023-04-01 04:33:17,998 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:33:18,000 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:33:18,003 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:33:18,003 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:33:18,006 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:33:18,007 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:33:17" (1/1) ... [2023-04-01 04:33:18,007 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c60f664 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:33:18, skipping insertion in model container [2023-04-01 04:33:18,008 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:33:17" (1/1) ... [2023-04-01 04:33:18,014 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:33:18,163 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:33:18,423 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/Problem19_label51.c[2619,2632] [2023-04-01 04:33:19,552 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:33:19,563 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:33:19,581 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/Problem19_label51.c[2619,2632] [2023-04-01 04:33:20,256 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:33:20,291 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:33:20,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:33:20 WrapperNode [2023-04-01 04:33:20,292 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:33:20,293 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:33:20,293 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:33:20,293 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:33:20,303 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:33:20" (1/1) ... [2023-04-01 04:33:20,303 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:33:20" (1/1) ... [2023-04-01 04:33:20,411 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:33:20" (1/1) ... [2023-04-01 04:33:20,412 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:33:20" (1/1) ... [2023-04-01 04:33:20,559 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:33:20" (1/1) ... [2023-04-01 04:33:20,611 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:33:20" (1/1) ... [2023-04-01 04:33:20,655 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:33:20" (1/1) ... [2023-04-01 04:33:20,678 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:33:20" (1/1) ... [2023-04-01 04:33:20,734 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:33:20,736 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:33:20,736 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:33:20,736 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:33:20,738 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:33:20" (1/1) ... [2023-04-01 04:33:20,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:33:20,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:33:20,771 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 04:33:20,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 04:33:20,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:33:20,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:33:20,817 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:33:20,817 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:33:20,817 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:33:20,817 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 04:33:20,817 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 04:33:20,817 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-04-01 04:33:20,817 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-04-01 04:33:20,817 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:33:20,818 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:33:20,818 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:33:20,818 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 04:33:20,818 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 04:33:20,818 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-04-01 04:33:20,818 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-04-01 04:33:20,818 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:33:20,818 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:33:20,818 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:33:20,818 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:33:20,818 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:33:20,818 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:33:20,819 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:33:20,819 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:33:20,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:33:20,819 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:33:20,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:33:20,819 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:33:20,819 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:33:20,909 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:33:20,912 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:33:28,320 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:33:43,205 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:33:43,205 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:33:43,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:33:43 BoogieIcfgContainer [2023-04-01 04:33:43,209 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:33:43,212 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:33:43,212 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:33:43,215 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:33:43,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:33:17" (1/3) ... [2023-04-01 04:33:43,216 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28e3dc25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:33:43, skipping insertion in model container [2023-04-01 04:33:43,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:33:20" (2/3) ... [2023-04-01 04:33:43,216 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28e3dc25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:33:43, skipping insertion in model container [2023-04-01 04:33:43,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:33:43" (3/3) ... [2023-04-01 04:33:43,218 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label51.c [2023-04-01 04:33:43,236 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:33:43,236 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:33:43,316 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:33:43,323 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;@70a54591, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:33:43,323 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:33:43,334 INFO L276 IsEmpty]: Start isEmpty. Operand has 1144 states, 1126 states have (on average 1.980461811722913) internal successors, (2230), 1127 states have internal predecessors, (2230), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 04:33:43,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:33:43,341 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:33:43,341 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:33:43,342 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:33:43,345 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:33:43,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1432408260, now seen corresponding path program 1 times [2023-04-01 04:33:43,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:33:43,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820913748] [2023-04-01 04:33:43,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:33:43,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:33:43,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:33:43,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:33:43,731 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:33:43,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820913748] [2023-04-01 04:33:43,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820913748] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:33:43,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:33:43,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:33:43,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581161157] [2023-04-01 04:33:43,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:33:43,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:33:43,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:33:43,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:33:43,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:33:43,767 INFO L87 Difference]: Start difference. First operand has 1144 states, 1126 states have (on average 1.980461811722913) internal successors, (2230), 1127 states have internal predecessors, (2230), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:33:50,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:33:50,147 INFO L93 Difference]: Finished difference Result 3418 states and 6741 transitions. [2023-04-01 04:33:50,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:33:50,152 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 04:33:50,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:33:50,190 INFO L225 Difference]: With dead ends: 3418 [2023-04-01 04:33:50,191 INFO L226 Difference]: Without dead ends: 2271 [2023-04-01 04:33:50,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:33:50,201 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 1199 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 3346 mSolverCounterSat, 1927 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1199 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 5273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1927 IncrementalHoareTripleChecker+Valid, 3346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:33:50,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1199 Valid, 147 Invalid, 5273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1927 Valid, 3346 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2023-04-01 04:33:50,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2023-04-01 04:33:50,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 2245. [2023-04-01 04:33:50,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2245 states, 2219 states have (on average 1.943668319062641) internal successors, (4313), 2219 states have internal predecessors, (4313), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (22), 12 states have call predecessors, (22), 12 states have call successors, (22) [2023-04-01 04:33:50,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 4348 transitions. [2023-04-01 04:33:50,355 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 4348 transitions. Word has length 11 [2023-04-01 04:33:50,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:33:50,355 INFO L495 AbstractCegarLoop]: Abstraction has 2245 states and 4348 transitions. [2023-04-01 04:33:50,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:33:50,356 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 4348 transitions. [2023-04-01 04:33:50,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-01 04:33:50,359 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:33:50,359 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] [2023-04-01 04:33:50,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:33:50,360 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:33:50,361 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:33:50,361 INFO L85 PathProgramCache]: Analyzing trace with hash 591229489, now seen corresponding path program 1 times [2023-04-01 04:33:50,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:33:50,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724077570] [2023-04-01 04:33:50,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:33:50,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:33:50,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:33:50,675 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:33:50,675 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:33:50,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724077570] [2023-04-01 04:33:50,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724077570] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:33:50,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:33:50,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:33:50,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292758303] [2023-04-01 04:33:50,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:33:50,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:33:50,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:33:50,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:33:50,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:33:50,681 INFO L87 Difference]: Start difference. First operand 2245 states and 4348 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:33:59,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:33:59,313 INFO L93 Difference]: Finished difference Result 6815 states and 13229 transitions. [2023-04-01 04:33:59,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 04:33:59,314 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 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 51 [2023-04-01 04:33:59,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:33:59,335 INFO L225 Difference]: With dead ends: 6815 [2023-04-01 04:33:59,336 INFO L226 Difference]: Without dead ends: 4575 [2023-04-01 04:33:59,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-01 04:33:59,342 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 3896 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 7008 mSolverCounterSat, 1354 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3896 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 8362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1354 IncrementalHoareTripleChecker+Valid, 7008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2023-04-01 04:33:59,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3896 Valid, 135 Invalid, 8362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1354 Valid, 7008 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2023-04-01 04:33:59,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4575 states. [2023-04-01 04:33:59,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4575 to 4526. [2023-04-01 04:33:59,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4526 states, 4460 states have (on average 1.6091928251121077) internal successors, (7177), 4464 states have internal predecessors, (7177), 23 states have call successors, (23), 23 states have call predecessors, (23), 42 states have return successors, (120), 38 states have call predecessors, (120), 22 states have call successors, (120) [2023-04-01 04:33:59,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4526 states to 4526 states and 7320 transitions. [2023-04-01 04:33:59,485 INFO L78 Accepts]: Start accepts. Automaton has 4526 states and 7320 transitions. Word has length 51 [2023-04-01 04:33:59,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:33:59,486 INFO L495 AbstractCegarLoop]: Abstraction has 4526 states and 7320 transitions. [2023-04-01 04:33:59,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:33:59,486 INFO L276 IsEmpty]: Start isEmpty. Operand 4526 states and 7320 transitions. [2023-04-01 04:33:59,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-04-01 04:33:59,490 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:33:59,490 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:33:59,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:33:59,491 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:33:59,491 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:33:59,491 INFO L85 PathProgramCache]: Analyzing trace with hash 484162141, now seen corresponding path program 1 times [2023-04-01 04:33:59,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:33:59,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318626089] [2023-04-01 04:33:59,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:33:59,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:33:59,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:33:59,719 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:33:59,720 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:33:59,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318626089] [2023-04-01 04:33:59,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318626089] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:33:59,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:33:59,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:33:59,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563637329] [2023-04-01 04:33:59,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:33:59,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:33:59,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:33:59,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:33:59,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:33:59,723 INFO L87 Difference]: Start difference. First operand 4526 states and 7320 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:34:06,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:34:06,906 INFO L93 Difference]: Finished difference Result 13831 states and 22530 transitions. [2023-04-01 04:34:06,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:34:06,907 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 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 61 [2023-04-01 04:34:06,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:34:06,947 INFO L225 Difference]: With dead ends: 13831 [2023-04-01 04:34:06,947 INFO L226 Difference]: Without dead ends: 9310 [2023-04-01 04:34:06,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:34:06,962 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 5941 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 6470 mSolverCounterSat, 704 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5941 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 7174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 704 IncrementalHoareTripleChecker+Valid, 6470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2023-04-01 04:34:06,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5941 Valid, 142 Invalid, 7174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [704 Valid, 6470 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2023-04-01 04:34:06,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9310 states. [2023-04-01 04:34:07,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9310 to 9008. [2023-04-01 04:34:07,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9008 states, 8825 states have (on average 1.5190934844192634) internal successors, (13406), 8845 states have internal predecessors, (13406), 43 states have call successors, (43), 43 states have call predecessors, (43), 139 states have return successors, (440), 119 states have call predecessors, (440), 42 states have call successors, (440) [2023-04-01 04:34:07,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9008 states to 9008 states and 13889 transitions. [2023-04-01 04:34:07,229 INFO L78 Accepts]: Start accepts. Automaton has 9008 states and 13889 transitions. Word has length 61 [2023-04-01 04:34:07,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:34:07,229 INFO L495 AbstractCegarLoop]: Abstraction has 9008 states and 13889 transitions. [2023-04-01 04:34:07,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:34:07,229 INFO L276 IsEmpty]: Start isEmpty. Operand 9008 states and 13889 transitions. [2023-04-01 04:34:07,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-04-01 04:34:07,236 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:34:07,236 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:34:07,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:34:07,237 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:34:07,238 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:34:07,238 INFO L85 PathProgramCache]: Analyzing trace with hash 396293746, now seen corresponding path program 1 times [2023-04-01 04:34:07,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:34:07,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793416173] [2023-04-01 04:34:07,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:34:07,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:34:07,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:34:07,519 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 04:34:07,519 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:34:07,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793416173] [2023-04-01 04:34:07,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793416173] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:34:07,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603752280] [2023-04-01 04:34:07,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:34:07,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:34:07,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:34:07,523 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:34:07,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 04:34:07,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:34:07,651 INFO L262 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 04:34:07,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:34:07,765 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 04:34:07,765 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 04:34:07,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603752280] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:34:07,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 04:34:07,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-04-01 04:34:07,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550333358] [2023-04-01 04:34:07,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:34:07,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:34:07,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:34:07,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:34:07,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 04:34:07,770 INFO L87 Difference]: Start difference. First operand 9008 states and 13889 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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)