/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/eca-rers2012/Problem13_label01.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:03:50,944 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:03:50,946 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:03:50,969 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:03:50,969 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:03:50,970 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:03:50,971 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:03:50,972 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:03:50,973 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:03:50,973 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:03:50,974 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:03:50,975 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:03:50,975 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:03:50,976 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:03:50,976 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:03:50,977 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:03:50,978 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:03:50,978 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:03:50,980 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:03:50,981 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:03:50,982 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:03:50,982 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:03:50,983 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:03:50,984 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:03:50,986 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:03:50,986 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:03:50,987 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:03:50,987 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:03:50,987 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:03:50,988 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:03:50,988 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:03:50,989 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:03:50,989 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:03:50,990 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:03:50,990 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:03:50,991 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:03:50,991 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:03:50,991 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:03:50,991 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:03:50,992 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:03:50,992 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:03:51,007 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 04:03:51,028 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:03:51,028 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:03:51,028 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:03:51,028 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:03:51,029 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:03:51,029 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:03:51,030 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:03:51,030 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:03:51,030 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:03:51,030 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:03:51,030 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:03:51,031 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:03:51,031 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:03:51,031 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:03:51,031 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:03:51,031 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:03:51,031 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:03:51,031 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:03:51,032 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:03:51,032 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:03:51,032 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:03:51,032 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:03:51,032 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:03:51,032 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:03:51,032 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:03:51,032 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:03:51,033 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:03:51,033 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:03:51,033 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:03:51,033 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:03:51,033 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:03:51,033 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:03:51,033 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:03:51,033 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:03:51,034 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:03:51,034 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:03:51,034 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:03:51,034 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:03:51,034 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:03:51,034 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:03:51,034 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:03:51,034 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:03:51,207 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:03:51,222 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:03:51,223 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:03:51,224 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:03:51,224 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:03:51,225 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label01.c [2023-04-01 04:03:52,437 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:03:52,874 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:03:52,875 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label01.c [2023-04-01 04:03:52,903 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1f6e44b4/d78a08a5471940fb9a9d760b9d35689f/FLAG57fb16b17 [2023-04-01 04:03:52,916 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1f6e44b4/d78a08a5471940fb9a9d760b9d35689f [2023-04-01 04:03:52,919 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:03:52,920 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:03:52,923 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:03:52,923 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:03:52,925 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:03:52,926 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:03:52" (1/1) ... [2023-04-01 04:03:52,927 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e61c530 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:52, skipping insertion in model container [2023-04-01 04:03:52,927 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:03:52" (1/1) ... [2023-04-01 04:03:52,931 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:03:53,031 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:03:53,285 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_label01.c[7003,7016] [2023-04-01 04:03:53,977 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:03:53,985 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:03:54,010 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_label01.c[7003,7016] [2023-04-01 04:03:54,484 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:03:54,503 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:03:54,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:54 WrapperNode [2023-04-01 04:03:54,505 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:03:54,506 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:03:54,506 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:03:54,506 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:03:54,514 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:54" (1/1) ... [2023-04-01 04:03:54,515 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:54" (1/1) ... [2023-04-01 04:03:54,565 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:54" (1/1) ... [2023-04-01 04:03:54,566 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:54" (1/1) ... [2023-04-01 04:03:54,675 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:54" (1/1) ... [2023-04-01 04:03:54,691 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:54" (1/1) ... [2023-04-01 04:03:54,709 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:54" (1/1) ... [2023-04-01 04:03:54,720 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:54" (1/1) ... [2023-04-01 04:03:54,744 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:03:54,744 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:03:54,744 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:03:54,745 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:03:54,745 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:54" (1/1) ... [2023-04-01 04:03:54,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:03:54,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:03:54,767 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 04:03:54,806 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 04:03:54,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:03:54,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:03:54,834 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:03:54,835 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:03:54,835 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:03:54,835 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 04:03:54,835 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 04:03:54,835 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:03:54,835 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:03:54,836 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:03:54,836 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 04:03:54,836 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 04:03:54,836 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:03:54,836 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:03:54,836 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:03:54,836 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:03:54,837 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:03:54,837 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:03:54,837 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:03:54,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:03:54,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:03:54,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:03:54,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:03:54,837 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:03:54,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:03:54,916 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:03:54,917 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:03:59,001 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:04:01,321 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:04:01,322 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:04:01,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:04:01 BoogieIcfgContainer [2023-04-01 04:04:01,326 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:04:01,466 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:04:01,466 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:04:01,468 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:04:01,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:03:52" (1/3) ... [2023-04-01 04:04:01,470 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f3f8b5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:04:01, skipping insertion in model container [2023-04-01 04:04:01,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:54" (2/3) ... [2023-04-01 04:04:01,470 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f3f8b5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:04:01, skipping insertion in model container [2023-04-01 04:04:01,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:04:01" (3/3) ... [2023-04-01 04:04:01,471 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label01.c [2023-04-01 04:04:01,489 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:04:01,489 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:04:01,551 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:04:01,557 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;@6c8c4b3c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:04:01,557 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:04:01,564 INFO L276 IsEmpty]: Start isEmpty. Operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 04:04:01,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:04:01,570 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:04:01,570 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:04:01,571 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:04:01,574 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:04:01,575 INFO L85 PathProgramCache]: Analyzing trace with hash -330929100, now seen corresponding path program 1 times [2023-04-01 04:04:01,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:04:01,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725798866] [2023-04-01 04:04:01,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:04:01,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:04:01,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:04:01,931 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 04:04:01,932 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:04:01,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725798866] [2023-04-01 04:04:01,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725798866] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:04:01,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:04:01,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:04:01,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763981884] [2023-04-01 04:04:01,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:04:01,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:04:01,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:04:01,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:04:01,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:04:01,969 INFO L87 Difference]: Start difference. First operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:04:05,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:04:05,043 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-04-01 04:04:05,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:04:05,045 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 04:04:05,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:04:05,065 INFO L225 Difference]: With dead ends: 2068 [2023-04-01 04:04:05,065 INFO L226 Difference]: Without dead ends: 1371 [2023-04-01 04:04:05,072 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 04:04:05,074 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 735 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2367 mSolverCounterSat, 436 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 735 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 2803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 436 IncrementalHoareTripleChecker+Valid, 2367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-04-01 04:04:05,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [735 Valid, 178 Invalid, 2803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [436 Valid, 2367 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-04-01 04:04:05,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-04-01 04:04:05,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1365. [2023-04-01 04:04:05,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1365 states, 1347 states have (on average 1.8574610244988865) internal successors, (2502), 1347 states have internal predecessors, (2502), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2023-04-01 04:04:05,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1365 states to 1365 states and 2525 transitions. [2023-04-01 04:04:05,147 INFO L78 Accepts]: Start accepts. Automaton has 1365 states and 2525 transitions. Word has length 11 [2023-04-01 04:04:05,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:04:05,147 INFO L495 AbstractCegarLoop]: Abstraction has 1365 states and 2525 transitions. [2023-04-01 04:04:05,148 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 04:04:05,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1365 states and 2525 transitions. [2023-04-01 04:04:05,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 04:04:05,149 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:04:05,149 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:04:05,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:04:05,149 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:04:05,150 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:04:05,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1946203245, now seen corresponding path program 1 times [2023-04-01 04:04:05,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:04:05,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484818940] [2023-04-01 04:04:05,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:04:05,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:04:05,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:04:05,295 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 04:04:05,296 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:04:05,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484818940] [2023-04-01 04:04:05,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484818940] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:04:05,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:04:05,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:04:05,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281898699] [2023-04-01 04:04:05,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:04:05,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:04:05,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:04:05,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:04:05,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:04:05,300 INFO L87 Difference]: Start difference. First operand 1365 states and 2525 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 04:04:09,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:04:09,354 INFO L93 Difference]: Finished difference Result 4150 states and 7698 transitions. [2023-04-01 04:04:09,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:04:09,355 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 21 [2023-04-01 04:04:09,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:04:09,370 INFO L225 Difference]: With dead ends: 4150 [2023-04-01 04:04:09,370 INFO L226 Difference]: Without dead ends: 2790 [2023-04-01 04:04:09,380 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 04:04:09,386 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 2455 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 3743 mSolverCounterSat, 1165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2455 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 4908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1165 IncrementalHoareTripleChecker+Valid, 3743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-04-01 04:04:09,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2455 Valid, 109 Invalid, 4908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1165 Valid, 3743 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-04-01 04:04:09,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2790 states. [2023-04-01 04:04:09,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2790 to 2749. [2023-04-01 04:04:09,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2749 states, 2702 states have (on average 1.5906735751295338) internal successors, (4298), 2708 states have internal predecessors, (4298), 15 states have call successors, (15), 15 states have call predecessors, (15), 31 states have return successors, (79), 25 states have call predecessors, (79), 14 states have call successors, (79) [2023-04-01 04:04:09,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2749 states to 2749 states and 4392 transitions. [2023-04-01 04:04:09,444 INFO L78 Accepts]: Start accepts. Automaton has 2749 states and 4392 transitions. Word has length 21 [2023-04-01 04:04:09,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:04:09,445 INFO L495 AbstractCegarLoop]: Abstraction has 2749 states and 4392 transitions. [2023-04-01 04:04:09,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 04:04:09,445 INFO L276 IsEmpty]: Start isEmpty. Operand 2749 states and 4392 transitions. [2023-04-01 04:04:09,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 04:04:09,445 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:04:09,445 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:04:09,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:04:09,446 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:04:09,446 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:04:09,446 INFO L85 PathProgramCache]: Analyzing trace with hash -907604599, now seen corresponding path program 1 times [2023-04-01 04:04:09,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:04:09,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692618959] [2023-04-01 04:04:09,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:04:09,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:04:09,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:04:09,532 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 04:04:09,533 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:04:09,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692618959] [2023-04-01 04:04:09,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692618959] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:04:09,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:04:09,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:04:09,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892552123] [2023-04-01 04:04:09,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:04:09,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:04:09,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:04:09,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:04:09,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:04:09,535 INFO L87 Difference]: Start difference. First operand 2749 states and 4392 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:04:14,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:04:14,438 INFO L93 Difference]: Finished difference Result 8429 states and 13621 transitions. [2023-04-01 04:04:14,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:04:14,450 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2023-04-01 04:04:14,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:04:14,474 INFO L225 Difference]: With dead ends: 8429 [2023-04-01 04:04:14,475 INFO L226 Difference]: Without dead ends: 5685 [2023-04-01 04:04:14,482 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 04:04:14,483 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 2178 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 4872 mSolverCounterSat, 859 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2178 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 5731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 859 IncrementalHoareTripleChecker+Valid, 4872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2023-04-01 04:04:14,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2178 Valid, 134 Invalid, 5731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [859 Valid, 4872 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2023-04-01 04:04:14,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5685 states. [2023-04-01 04:04:14,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5685 to 5634. [2023-04-01 04:04:14,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5634 states, 5490 states have (on average 1.3936247723132968) internal successors, (7651), 5522 states have internal predecessors, (7651), 27 states have call successors, (27), 27 states have call predecessors, (27), 116 states have return successors, (373), 84 states have call predecessors, (373), 26 states have call successors, (373) [2023-04-01 04:04:14,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5634 states to 5634 states and 8051 transitions. [2023-04-01 04:04:14,615 INFO L78 Accepts]: Start accepts. Automaton has 5634 states and 8051 transitions. Word has length 23 [2023-04-01 04:04:14,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:04:14,615 INFO L495 AbstractCegarLoop]: Abstraction has 5634 states and 8051 transitions. [2023-04-01 04:04:14,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:04:14,615 INFO L276 IsEmpty]: Start isEmpty. Operand 5634 states and 8051 transitions. [2023-04-01 04:04:14,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 04:04:14,616 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:04:14,617 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:04:14,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:04:14,617 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:04:14,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:04:14,617 INFO L85 PathProgramCache]: Analyzing trace with hash -383515918, now seen corresponding path program 1 times [2023-04-01 04:04:14,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:04:14,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080284795] [2023-04-01 04:04:14,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:04:14,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:04:14,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:04:14,756 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 04:04:14,757 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:04:14,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080284795] [2023-04-01 04:04:14,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080284795] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:04:14,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124062045] [2023-04-01 04:04:14,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:04:14,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:04:14,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:04:14,760 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 04:04:14,764 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 04:04:14,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:04:14,865 INFO L262 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 04:04:14,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:04:14,960 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 04:04:14,960 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 04:04:14,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124062045] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:04:14,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 04:04:14,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 04:04:14,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837902095] [2023-04-01 04:04:14,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:04:14,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:04:14,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:04:14,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:04:14,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:04:14,963 INFO L87 Difference]: Start difference. First operand 5634 states and 8051 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 04:04:19,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:04:19,297 INFO L93 Difference]: Finished difference Result 17148 states and 25308 transitions. [2023-04-01 04:04:19,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 04:04:19,297 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 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 41 [2023-04-01 04:04:19,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:04:19,331 INFO L225 Difference]: With dead ends: 17148 [2023-04-01 04:04:19,331 INFO L226 Difference]: Without dead ends: 11519 [2023-04-01 04:04:19,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-04-01 04:04:19,346 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 2042 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 4474 mSolverCounterSat, 1061 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2042 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 5535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1061 IncrementalHoareTripleChecker+Valid, 4474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:04:19,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2042 Valid, 103 Invalid, 5535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1061 Valid, 4474 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-04-01 04:04:19,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11519 states. [2023-04-01 04:04:19,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11519 to 10645. [2023-04-01 04:04:19,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10645 states, 10328 states have (on average 1.2574554608830364) internal successors, (12987), 10410 states have internal predecessors, (12987), 49 states have call successors, (49), 49 states have call predecessors, (49), 267 states have return successors, (1161), 185 states have call predecessors, (1161), 48 states have call successors, (1161) [2023-04-01 04:04:19,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10645 states to 10645 states and 14197 transitions. [2023-04-01 04:04:19,563 INFO L78 Accepts]: Start accepts. Automaton has 10645 states and 14197 transitions. Word has length 41 [2023-04-01 04:04:19,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:04:19,564 INFO L495 AbstractCegarLoop]: Abstraction has 10645 states and 14197 transitions. [2023-04-01 04:04:19,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 04:04:19,564 INFO L276 IsEmpty]: Start isEmpty. Operand 10645 states and 14197 transitions. [2023-04-01 04:04:19,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-04-01 04:04:19,572 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:04:19,572 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:04:19,579 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 04:04:19,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:04:19,778 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:04:19,779 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:04:19,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1807458618, now seen corresponding path program 1 times [2023-04-01 04:04:19,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:04:19,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902218880] [2023-04-01 04:04:19,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:04:19,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:04:19,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:04:20,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:04:20,341 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:04:20,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902218880] [2023-04-01 04:04:20,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902218880] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:04:20,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406489393] [2023-04-01 04:04:20,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:04:20,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:04:20,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:04:20,346 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:04:20,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 04:04:20,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:04:20,438 INFO L262 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 04:04:20,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:04:20,552 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 04:04:20,552 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 04:04:20,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406489393] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:04:20,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 04:04:20,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2023-04-01 04:04:20,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65569824] [2023-04-01 04:04:20,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:04:20,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:04:20,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:04:20,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:04:20,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-01 04:04:20,554 INFO L87 Difference]: Start difference. First operand 10645 states and 14197 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 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 04:04:24,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:04:24,080 INFO L93 Difference]: Finished difference Result 19718 states and 26897 transitions. [2023-04-01 04:04:24,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:04:24,081 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 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 70 [2023-04-01 04:04:24,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:04:24,112 INFO L225 Difference]: With dead ends: 19718 [2023-04-01 04:04:24,113 INFO L226 Difference]: Without dead ends: 11456 [2023-04-01 04:04:24,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-04-01 04:04:24,129 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 1952 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 4517 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1952 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 4655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 4517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-04-01 04:04:24,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1952 Valid, 117 Invalid, 4655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 4517 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-04-01 04:04:24,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11456 states. [2023-04-01 04:04:24,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11456 to 11052. [2023-04-01 04:04:24,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11052 states, 10677 states have (on average 1.2486653554369205) internal successors, (13332), 10787 states have internal predecessors, (13332), 50 states have call successors, (50), 50 states have call predecessors, (50), 324 states have return successors, (1302), 214 states have call predecessors, (1302), 49 states have call successors, (1302) [2023-04-01 04:04:24,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11052 states to 11052 states and 14684 transitions. [2023-04-01 04:04:24,336 INFO L78 Accepts]: Start accepts. Automaton has 11052 states and 14684 transitions. Word has length 70 [2023-04-01 04:04:24,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:04:24,337 INFO L495 AbstractCegarLoop]: Abstraction has 11052 states and 14684 transitions. [2023-04-01 04:04:24,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 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 04:04:24,337 INFO L276 IsEmpty]: Start isEmpty. Operand 11052 states and 14684 transitions. [2023-04-01 04:04:24,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-01 04:04:24,338 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:04:24,338 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:04:24,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 04:04:24,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:04:24,542 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:04:24,543 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:04:24,543 INFO L85 PathProgramCache]: Analyzing trace with hash -60339909, now seen corresponding path program 1 times [2023-04-01 04:04:24,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:04:24,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762574878] [2023-04-01 04:04:24,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:04:24,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:04:24,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:04:24,852 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-01 04:04:24,852 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:04:24,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762574878] [2023-04-01 04:04:24,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762574878] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:04:24,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:04:24,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:04:24,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530047398] [2023-04-01 04:04:24,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:04:24,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:04:24,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:04:24,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:04:24,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:04:24,854 INFO L87 Difference]: Start difference. First operand 11052 states and 14684 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 04:04:27,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:04:27,558 INFO L93 Difference]: Finished difference Result 23504 states and 32518 transitions. [2023-04-01 04:04:27,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:04:27,558 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 75 [2023-04-01 04:04:27,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:04:27,603 INFO L225 Difference]: With dead ends: 23504 [2023-04-01 04:04:27,603 INFO L226 Difference]: Without dead ends: 13106 [2023-04-01 04:04:27,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:04:27,627 INFO L413 NwaCegarLoop]: 959 mSDtfsCounter, 852 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 2069 mSolverCounterSat, 654 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 852 SdHoareTripleChecker+Valid, 987 SdHoareTripleChecker+Invalid, 2723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 654 IncrementalHoareTripleChecker+Valid, 2069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-04-01 04:04:27,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [852 Valid, 987 Invalid, 2723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [654 Valid, 2069 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-04-01 04:04:27,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13106 states. [2023-04-01 04:04:27,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13106 to 13042. [2023-04-01 04:04:27,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13042 states, 12646 states have (on average 1.2290842954293848) internal successors, (15543), 12759 states have internal predecessors, (15543), 59 states have call successors, (59), 59 states have call predecessors, (59), 336 states have return successors, (1489), 223 states have call predecessors, (1489), 58 states have call successors, (1489) [2023-04-01 04:04:27,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13042 states to 13042 states and 17091 transitions. [2023-04-01 04:04:27,884 INFO L78 Accepts]: Start accepts. Automaton has 13042 states and 17091 transitions. Word has length 75 [2023-04-01 04:04:27,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:04:27,886 INFO L495 AbstractCegarLoop]: Abstraction has 13042 states and 17091 transitions. [2023-04-01 04:04:27,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 04:04:27,887 INFO L276 IsEmpty]: Start isEmpty. Operand 13042 states and 17091 transitions. [2023-04-01 04:04:27,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-04-01 04:04:27,889 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:04:27,889 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:04:27,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 04:04:27,889 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:04:27,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:04:27,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1522115987, now seen corresponding path program 1 times [2023-04-01 04:04:27,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:04:27,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930015791] [2023-04-01 04:04:27,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:04:27,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:04:27,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:04:28,063 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-04-01 04:04:28,063 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:04:28,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930015791] [2023-04-01 04:04:28,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930015791] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:04:28,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:04:28,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:04:28,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953073130] [2023-04-01 04:04:28,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:04:28,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:04:28,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:04:28,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:04:28,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:04:28,065 INFO L87 Difference]: Start difference. First operand 13042 states and 17091 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 04:04:31,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:04:31,166 INFO L93 Difference]: Finished difference Result 32326 states and 44754 transitions. [2023-04-01 04:04:31,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:04:31,167 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 79 [2023-04-01 04:04:31,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:04:31,221 INFO L225 Difference]: With dead ends: 32326 [2023-04-01 04:04:31,221 INFO L226 Difference]: Without dead ends: 19938 [2023-04-01 04:04:31,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:04:31,248 INFO L413 NwaCegarLoop]: 1236 mSDtfsCounter, 674 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 2237 mSolverCounterSat, 633 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 674 SdHoareTripleChecker+Valid, 1264 SdHoareTripleChecker+Invalid, 2870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 633 IncrementalHoareTripleChecker+Valid, 2237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-04-01 04:04:31,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [674 Valid, 1264 Invalid, 2870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [633 Valid, 2237 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-04-01 04:04:31,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19938 states. [2023-04-01 04:04:31,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19938 to 19774. [2023-04-01 04:04:31,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19774 states, 19254 states have (on average 1.1828191544614106) internal successors, (22774), 19396 states have internal predecessors, (22774), 89 states have call successors, (89), 89 states have call predecessors, (89), 430 states have return successors, (2607), 288 states have call predecessors, (2607), 88 states have call successors, (2607) [2023-04-01 04:04:31,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19774 states to 19774 states and 25470 transitions. [2023-04-01 04:04:31,554 INFO L78 Accepts]: Start accepts. Automaton has 19774 states and 25470 transitions. Word has length 79 [2023-04-01 04:04:31,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:04:31,555 INFO L495 AbstractCegarLoop]: Abstraction has 19774 states and 25470 transitions. [2023-04-01 04:04:31,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 04:04:31,555 INFO L276 IsEmpty]: Start isEmpty. Operand 19774 states and 25470 transitions. [2023-04-01 04:04:31,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-04-01 04:04:31,556 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:04:31,556 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:04:31,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 04:04:31,557 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:04:31,557 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:04:31,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1193610510, now seen corresponding path program 1 times [2023-04-01 04:04:31,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:04:31,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188320692] [2023-04-01 04:04:31,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:04:31,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:04:31,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:04:31,754 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:04:31,755 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:04:31,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188320692] [2023-04-01 04:04:31,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188320692] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:04:31,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722757195] [2023-04-01 04:04:31,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:04:31,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:04:31,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:04:31,769 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:04:31,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 04:04:31,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:04:31,849 INFO L262 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-01 04:04:31,856 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:04:31,942 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:04:31,943 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:04:32,178 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 04:04:32,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722757195] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 04:04:32,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 04:04:32,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 11 [2023-04-01 04:04:32,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311778655] [2023-04-01 04:04:32,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:04:32,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 04:04:32,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:04:32,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 04:04:32,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2023-04-01 04:04:32,181 INFO L87 Difference]: Start difference. First operand 19774 states and 25470 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 5 states have internal predecessors, (75), 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 04:04:38,714 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-01 04:04:40,722 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-01 04:04:41,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:04:41,735 INFO L93 Difference]: Finished difference Result 67417 states and 91110 transitions. [2023-04-01 04:04:41,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:04:41,736 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 5 states have internal predecessors, (75), 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 81 [2023-04-01 04:04:41,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:04:41,864 INFO L225 Difference]: With dead ends: 67417 [2023-04-01 04:04:41,864 INFO L226 Difference]: Without dead ends: 48282 [2023-04-01 04:04:41,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2023-04-01 04:04:41,908 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 2704 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 3494 mSolverCounterSat, 2335 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2704 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 5831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2335 IncrementalHoareTripleChecker+Valid, 3494 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:04:41,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2704 Valid, 92 Invalid, 5831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2335 Valid, 3494 Invalid, 2 Unknown, 0 Unchecked, 9.1s Time] [2023-04-01 04:04:41,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48282 states. [2023-04-01 04:04:42,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48282 to 43780. [2023-04-01 04:04:42,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43780 states, 42794 states have (on average 1.1786932747581436) internal successors, (50441), 43056 states have internal predecessors, (50441), 201 states have call successors, (201), 201 states have call predecessors, (201), 784 states have return successors, (8657), 522 states have call predecessors, (8657), 200 states have call successors, (8657) [2023-04-01 04:04:42,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43780 states to 43780 states and 59299 transitions. [2023-04-01 04:04:42,638 INFO L78 Accepts]: Start accepts. Automaton has 43780 states and 59299 transitions. Word has length 81 [2023-04-01 04:04:42,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:04:42,640 INFO L495 AbstractCegarLoop]: Abstraction has 43780 states and 59299 transitions. [2023-04-01 04:04:42,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 5 states have internal predecessors, (75), 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 04:04:42,642 INFO L276 IsEmpty]: Start isEmpty. Operand 43780 states and 59299 transitions. [2023-04-01 04:04:42,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-01 04:04:42,643 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:04:42,643 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:04:42,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 04:04:42,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:04:42,852 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:04:42,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:04:42,853 INFO L85 PathProgramCache]: Analyzing trace with hash -307936853, now seen corresponding path program 1 times [2023-04-01 04:04:42,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:04:42,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254263665] [2023-04-01 04:04:42,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:04:42,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:04:42,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:04:42,977 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 57 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-01 04:04:42,977 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:04:42,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254263665] [2023-04-01 04:04:42,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254263665] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:04:42,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904577827] [2023-04-01 04:04:42,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:04:42,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:04:42,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:04:42,979 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) [2023-04-01 04:04:42,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 04:04:43,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:04:43,103 INFO L262 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 04:04:43,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:04:43,228 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-04-01 04:04:43,228 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:04:43,510 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-04-01 04:04:43,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904577827] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 04:04:43,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 04:04:43,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 9 [2023-04-01 04:04:43,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229559773] [2023-04-01 04:04:43,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:04:43,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:04:43,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:04:43,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:04:43,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-04-01 04:04:43,512 INFO L87 Difference]: Start difference. First operand 43780 states and 59299 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 04:04:48,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:04:48,293 INFO L93 Difference]: Finished difference Result 121349 states and 168155 transitions. [2023-04-01 04:04:48,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 04:04:48,293 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 86 [2023-04-01 04:04:48,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:04:48,562 INFO L225 Difference]: With dead ends: 121349 [2023-04-01 04:04:48,562 INFO L226 Difference]: Without dead ends: 77959 [2023-04-01 04:04:48,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 160 SyntacticMatches, 9 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-04-01 04:04:48,732 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 2368 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 3746 mSolverCounterSat, 849 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2368 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 4595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 849 IncrementalHoareTripleChecker+Valid, 3746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-04-01 04:04:48,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2368 Valid, 79 Invalid, 4595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [849 Valid, 3746 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2023-04-01 04:04:48,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77959 states. [2023-04-01 04:04:49,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77959 to 76046. [2023-04-01 04:04:49,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76046 states, 74236 states have (on average 1.1446198609838891) internal successors, (84972), 74772 states have internal predecessors, (84972), 348 states have call successors, (348), 348 states have call predecessors, (348), 1461 states have return successors, (16225), 925 states have call predecessors, (16225), 347 states have call successors, (16225) [2023-04-01 04:04:50,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76046 states to 76046 states and 101545 transitions. [2023-04-01 04:04:50,017 INFO L78 Accepts]: Start accepts. Automaton has 76046 states and 101545 transitions. Word has length 86 [2023-04-01 04:04:50,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:04:50,018 INFO L495 AbstractCegarLoop]: Abstraction has 76046 states and 101545 transitions. [2023-04-01 04:04:50,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 04:04:50,018 INFO L276 IsEmpty]: Start isEmpty. Operand 76046 states and 101545 transitions. [2023-04-01 04:04:50,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-04-01 04:04:50,021 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:04:50,021 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 04:04:50,027 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-01 04:04:50,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:04:50,227 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:04:50,227 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:04:50,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1179843676, now seen corresponding path program 1 times [2023-04-01 04:04:50,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:04:50,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509763717] [2023-04-01 04:04:50,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:04:50,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:04:50,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:04:50,720 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 53 proven. 12 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-04-01 04:04:50,720 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:04:50,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509763717] [2023-04-01 04:04:50,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509763717] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:04:50,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633917691] [2023-04-01 04:04:50,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:04:50,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:04:50,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:04:50,721 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:04:50,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 04:04:50,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:04:50,859 INFO L262 TraceCheckSpWp]: Trace formula consists of 739 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:04:50,861 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:04:51,003 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 76 proven. 2 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-04-01 04:04:51,003 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:04:51,076 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 76 proven. 2 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-04-01 04:04:51,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633917691] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:04:51,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [325280102] [2023-04-01 04:04:51,093 INFO L159 IcfgInterpreter]: Started Sifa with 55 locations of interest [2023-04-01 04:04:51,093 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:04:51,095 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:04:51,099 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:04:51,099 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:04:51,208 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 49 for LOIs [2023-04-01 04:04:51,408 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 43