/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/eca-rers2012/Problem19_label28.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:31:22,904 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:31:22,907 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:31:22,944 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:31:22,945 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:31:22,947 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:31:22,953 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:31:22,955 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:31:22,957 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:31:22,961 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:31:22,962 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:31:22,964 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:31:22,964 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:31:22,966 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:31:22,967 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:31:22,969 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:31:22,970 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:31:22,971 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:31:22,974 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:31:22,979 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:31:22,980 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:31:22,982 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:31:22,983 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:31:22,985 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:31:22,989 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 04:31:22,991 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:31:22,992 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:31:22,996 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:31:22,997 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:31:22,997 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:31:22,998 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:31:22,998 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:31:22,998 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:31:22,998 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:31:23,001 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:31:23,001 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:31:23,002 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 04:31:23,032 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:31:23,032 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:31:23,032 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:31:23,033 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:31:23,033 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:31:23,033 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:31:23,034 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:31:23,034 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:31:23,034 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:31:23,034 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:31:23,035 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:31:23,035 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:31:23,035 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:31:23,035 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:31:23,035 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:31:23,035 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:31:23,035 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:31:23,035 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:31:23,036 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:31:23,036 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:31:23,036 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:31:23,036 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:31:23,036 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:31:23,037 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:31:23,037 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:31:23,037 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:31:23,037 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:31:23,037 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:31:23,037 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:31:23,038 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:31:23,038 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:31:23,038 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:31:23,038 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:31:23,038 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:31:23,038 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:31:23,038 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:31:23,039 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:31:23,039 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:31:23,039 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:31:23,039 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:31:23,039 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:31:23,039 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:31:23,261 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:31:23,282 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:31:23,284 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:31:23,284 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:31:23,285 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:31:23,286 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label28.c [2023-04-01 04:31:24,445 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:31:25,061 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:31:25,061 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label28.c [2023-04-01 04:31:25,120 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9b75ce2c/96eafd01a35c482d9d2383c557a560c4/FLAGb980cc654 [2023-04-01 04:31:25,134 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9b75ce2c/96eafd01a35c482d9d2383c557a560c4 [2023-04-01 04:31:25,137 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:31:25,138 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:31:25,141 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:31:25,141 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:31:25,144 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:31:25,145 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:31:25" (1/1) ... [2023-04-01 04:31:25,146 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55e47753 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:31:25, skipping insertion in model container [2023-04-01 04:31:25,146 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:31:25" (1/1) ... [2023-04-01 04:31:25,152 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:31:25,310 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:31:25,543 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label28.c[3379,3392] [2023-04-01 04:31:26,611 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:31:26,620 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:31:26,648 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label28.c[3379,3392] [2023-04-01 04:31:27,373 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:31:27,405 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:31:27,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:31:27 WrapperNode [2023-04-01 04:31:27,406 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:31:27,407 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:31:27,407 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:31:27,407 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:31:27,417 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:31:27" (1/1) ... [2023-04-01 04:31:27,417 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:31:27" (1/1) ... [2023-04-01 04:31:27,515 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:31:27" (1/1) ... [2023-04-01 04:31:27,515 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:31:27" (1/1) ... [2023-04-01 04:31:27,705 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:31:27" (1/1) ... [2023-04-01 04:31:27,739 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:31:27" (1/1) ... [2023-04-01 04:31:27,797 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:31:27" (1/1) ... [2023-04-01 04:31:27,821 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:31:27" (1/1) ... [2023-04-01 04:31:27,879 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:31:27,880 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:31:27,880 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:31:27,881 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:31:27,882 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:31:27" (1/1) ... [2023-04-01 04:31:27,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:31:27,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:31:27,914 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 04:31:27,940 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 04:31:27,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:31:27,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:31:27,962 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:31:27,962 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:31:27,962 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:31:27,962 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 04:31:27,962 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 04:31:27,962 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-04-01 04:31:27,962 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-04-01 04:31:27,962 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:31:27,962 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:31:27,962 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:31:27,962 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 04:31:27,963 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 04:31:27,963 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-04-01 04:31:27,963 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-04-01 04:31:27,963 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:31:27,963 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:31:27,963 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:31:27,963 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:31:27,963 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:31:27,963 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:31:27,963 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:31:27,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:31:27,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:31:27,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:31:27,964 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:31:27,964 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:31:27,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:31:28,040 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:31:28,042 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:31:35,320 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:31:49,416 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:31:49,416 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:31:49,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:31:49 BoogieIcfgContainer [2023-04-01 04:31:49,421 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:31:49,423 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:31:49,423 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:31:49,426 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:31:49,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:31:25" (1/3) ... [2023-04-01 04:31:49,427 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69cf2cc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:31:49, skipping insertion in model container [2023-04-01 04:31:49,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:31:27" (2/3) ... [2023-04-01 04:31:49,427 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69cf2cc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:31:49, skipping insertion in model container [2023-04-01 04:31:49,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:31:49" (3/3) ... [2023-04-01 04:31:49,429 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label28.c [2023-04-01 04:31:49,447 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:31:49,448 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:31:49,523 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:31:49,530 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;@6b83a2ba, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:31:49,530 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:31:49,539 INFO L276 IsEmpty]: Start isEmpty. Operand has 1144 states, 1126 states have (on average 1.980461811722913) internal successors, (2230), 1127 states have internal predecessors, (2230), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 04:31:49,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:31:49,545 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:31:49,546 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:31:49,547 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:31:49,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:31:49,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1432409796, now seen corresponding path program 1 times [2023-04-01 04:31:49,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:31:49,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942950713] [2023-04-01 04:31:49,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:31:49,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:31:49,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:31:49,931 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 04:31:49,931 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:31:49,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942950713] [2023-04-01 04:31:49,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942950713] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:31:49,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:31:49,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:31:49,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922425925] [2023-04-01 04:31:49,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:31:49,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:31:49,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:31:49,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:31:49,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:31:49,974 INFO L87 Difference]: Start difference. First operand has 1144 states, 1126 states have (on average 1.980461811722913) internal successors, (2230), 1127 states have internal predecessors, (2230), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:31:56,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:31:56,461 INFO L93 Difference]: Finished difference Result 3418 states and 6741 transitions. [2023-04-01 04:31:56,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:31:56,464 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 04:31:56,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:31:56,486 INFO L225 Difference]: With dead ends: 3418 [2023-04-01 04:31:56,487 INFO L226 Difference]: Without dead ends: 2271 [2023-04-01 04:31:56,493 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 04:31:56,496 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 1291 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 3272 mSolverCounterSat, 1797 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1291 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 5069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1797 IncrementalHoareTripleChecker+Valid, 3272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2023-04-01 04:31:56,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1291 Valid, 251 Invalid, 5069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1797 Valid, 3272 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2023-04-01 04:31:56,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2023-04-01 04:31:56,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 2267. [2023-04-01 04:31:56,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2267 states, 2241 states have (on average 1.892904953145917) internal successors, (4242), 2241 states have internal predecessors, (4242), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (22), 12 states have call predecessors, (22), 12 states have call successors, (22) [2023-04-01 04:31:56,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2267 states to 2267 states and 4277 transitions. [2023-04-01 04:31:56,652 INFO L78 Accepts]: Start accepts. Automaton has 2267 states and 4277 transitions. Word has length 11 [2023-04-01 04:31:56,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:31:56,652 INFO L495 AbstractCegarLoop]: Abstraction has 2267 states and 4277 transitions. [2023-04-01 04:31:56,652 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 04:31:56,652 INFO L276 IsEmpty]: Start isEmpty. Operand 2267 states and 4277 transitions. [2023-04-01 04:31:56,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 04:31:56,654 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:31:56,654 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 04:31:56,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:31:56,654 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:31:56,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:31:56,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1861993453, now seen corresponding path program 1 times [2023-04-01 04:31:56,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:31:56,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552498949] [2023-04-01 04:31:56,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:31:56,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:31:56,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:31:56,867 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 04:31:56,868 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:31:56,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552498949] [2023-04-01 04:31:56,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552498949] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:31:56,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:31:56,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:31:56,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758336607] [2023-04-01 04:31:56,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:31:56,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:31:56,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:31:56,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:31:56,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:31:56,873 INFO L87 Difference]: Start difference. First operand 2267 states and 4277 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 04:32:05,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:32:05,120 INFO L93 Difference]: Finished difference Result 6937 states and 13090 transitions. [2023-04-01 04:32:05,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:32:05,125 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 04:32:05,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:32:05,151 INFO L225 Difference]: With dead ends: 6937 [2023-04-01 04:32:05,151 INFO L226 Difference]: Without dead ends: 4675 [2023-04-01 04:32:05,158 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 04:32:05,159 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 4003 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 6742 mSolverCounterSat, 1791 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4003 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 8533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1791 IncrementalHoareTripleChecker+Valid, 6742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:32:05,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4003 Valid, 178 Invalid, 8533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1791 Valid, 6742 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2023-04-01 04:32:05,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4675 states. [2023-04-01 04:32:05,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4675 to 4604. [2023-04-01 04:32:05,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4604 states, 4526 states have (on average 1.5733539549270878) internal successors, (7121), 4533 states have internal predecessors, (7121), 23 states have call successors, (23), 23 states have call predecessors, (23), 54 states have return successors, (142), 47 states have call predecessors, (142), 22 states have call successors, (142) [2023-04-01 04:32:05,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4604 states to 4604 states and 7286 transitions. [2023-04-01 04:32:05,307 INFO L78 Accepts]: Start accepts. Automaton has 4604 states and 7286 transitions. Word has length 21 [2023-04-01 04:32:05,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:32:05,307 INFO L495 AbstractCegarLoop]: Abstraction has 4604 states and 7286 transitions. [2023-04-01 04:32:05,307 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 04:32:05,307 INFO L276 IsEmpty]: Start isEmpty. Operand 4604 states and 7286 transitions. [2023-04-01 04:32:05,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-01 04:32:05,308 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:32:05,308 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] [2023-04-01 04:32:05,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:32:05,308 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:32:05,309 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:32:05,309 INFO L85 PathProgramCache]: Analyzing trace with hash -840474947, now seen corresponding path program 1 times [2023-04-01 04:32:05,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:32:05,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088145311] [2023-04-01 04:32:05,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:32:05,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:32:05,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:32:05,423 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 04:32:05,423 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:32:05,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088145311] [2023-04-01 04:32:05,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088145311] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:32:05,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:32:05,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:32:05,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294896261] [2023-04-01 04:32:05,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:32:05,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:32:05,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:32:05,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:32:05,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:32:05,428 INFO L87 Difference]: Start difference. First operand 4604 states and 7286 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 04:32:11,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:32:11,862 INFO L93 Difference]: Finished difference Result 12915 states and 21078 transitions. [2023-04-01 04:32:11,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:32:11,870 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 24 [2023-04-01 04:32:11,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:32:11,906 INFO L225 Difference]: With dead ends: 12915 [2023-04-01 04:32:11,906 INFO L226 Difference]: Without dead ends: 8316 [2023-04-01 04:32:11,919 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 04:32:11,921 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 3658 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 6961 mSolverCounterSat, 1184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3658 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 8145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1184 IncrementalHoareTripleChecker+Valid, 6961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:32:11,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3658 Valid, 159 Invalid, 8145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1184 Valid, 6961 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2023-04-01 04:32:11,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8316 states. [2023-04-01 04:32:12,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8316 to 8220. [2023-04-01 04:32:12,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8220 states, 8029 states have (on average 1.5387968613775065) internal successors, (12355), 8053 states have internal predecessors, (12355), 38 states have call successors, (38), 38 states have call predecessors, (38), 152 states have return successors, (540), 128 states have call predecessors, (540), 37 states have call successors, (540) [2023-04-01 04:32:12,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8220 states to 8220 states and 12933 transitions. [2023-04-01 04:32:12,137 INFO L78 Accepts]: Start accepts. Automaton has 8220 states and 12933 transitions. Word has length 24 [2023-04-01 04:32:12,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:32:12,138 INFO L495 AbstractCegarLoop]: Abstraction has 8220 states and 12933 transitions. [2023-04-01 04:32:12,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 04:32:12,138 INFO L276 IsEmpty]: Start isEmpty. Operand 8220 states and 12933 transitions. [2023-04-01 04:32:12,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 04:32:12,140 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:32:12,140 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] [2023-04-01 04:32:12,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:32:12,140 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:32:12,141 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:32:12,141 INFO L85 PathProgramCache]: Analyzing trace with hash -479172139, now seen corresponding path program 1 times [2023-04-01 04:32:12,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:32:12,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440617748] [2023-04-01 04:32:12,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:32:12,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:32:12,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:32:12,319 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 04:32:12,319 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:32:12,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440617748] [2023-04-01 04:32:12,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440617748] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:32:12,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:32:12,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:32:12,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540108682] [2023-04-01 04:32:12,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:32:12,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:32:12,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:32:12,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:32:12,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:32:12,321 INFO L87 Difference]: Start difference. First operand 8220 states and 12933 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 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)