/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/systemc/pipeline.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 06:09:37,127 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 06:09:37,129 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 06:09:37,155 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 06:09:37,155 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 06:09:37,156 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 06:09:37,157 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 06:09:37,158 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 06:09:37,159 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 06:09:37,160 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 06:09:37,160 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 06:09:37,161 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 06:09:37,161 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 06:09:37,162 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 06:09:37,163 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 06:09:37,163 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 06:09:37,164 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 06:09:37,164 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 06:09:37,166 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 06:09:37,167 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 06:09:37,168 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 06:09:37,169 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 06:09:37,169 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 06:09:37,170 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 06:09:37,173 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 06:09:37,173 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 06:09:37,173 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 06:09:37,174 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 06:09:37,174 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 06:09:37,175 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 06:09:37,175 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 06:09:37,175 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 06:09:37,176 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 06:09:37,176 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 06:09:37,177 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 06:09:37,177 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 06:09:37,178 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 06:09:37,178 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 06:09:37,178 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 06:09:37,179 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 06:09:37,179 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 06:09:37,180 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 06:09:37,195 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 06:09:37,195 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 06:09:37,195 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 06:09:37,196 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 06:09:37,196 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 06:09:37,196 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 06:09:37,196 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 06:09:37,199 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 06:09:37,200 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 06:09:37,200 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 06:09:37,200 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 06:09:37,200 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 06:09:37,200 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 06:09:37,200 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 06:09:37,200 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 06:09:37,200 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 06:09:37,201 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 06:09:37,201 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 06:09:37,201 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 06:09:37,201 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 06:09:37,201 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 06:09:37,202 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 06:09:37,202 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 06:09:37,202 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 06:09:37,202 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 06:09:37,202 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 06:09:37,202 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 06:09:37,202 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 06:09:37,202 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 06:09:37,202 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 06:09:37,203 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 06:09:37,203 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 06:09:37,203 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:09:37,203 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 06:09:37,203 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 06:09:37,203 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 06:09:37,203 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 06:09:37,203 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 06:09:37,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 06:09:37,204 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 06:09:37,204 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 06:09:37,204 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 06:09:37,366 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 06:09:37,387 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 06:09:37,389 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 06:09:37,390 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 06:09:37,390 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 06:09:37,391 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/pipeline.cil-2.c [2023-04-01 06:09:38,440 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 06:09:38,606 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 06:09:38,607 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/pipeline.cil-2.c [2023-04-01 06:09:38,613 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/362acfce2/51037b4ea87948a693c81df388ef7ea2/FLAGb36eb4a9c [2023-04-01 06:09:38,622 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/362acfce2/51037b4ea87948a693c81df388ef7ea2 [2023-04-01 06:09:38,624 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 06:09:38,625 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 06:09:38,626 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 06:09:38,626 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 06:09:38,628 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 06:09:38,628 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:09:38" (1/1) ... [2023-04-01 06:09:38,629 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4283c1e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:09:38, skipping insertion in model container [2023-04-01 06:09:38,629 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:09:38" (1/1) ... [2023-04-01 06:09:38,633 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 06:09:38,656 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 06:09:38,745 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/systemc/pipeline.cil-2.c[640,653] [2023-04-01 06:09:38,805 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:09:38,814 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 06:09:38,821 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/systemc/pipeline.cil-2.c[640,653] [2023-04-01 06:09:38,847 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:09:38,857 INFO L208 MainTranslator]: Completed translation [2023-04-01 06:09:38,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:09:38 WrapperNode [2023-04-01 06:09:38,857 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 06:09:38,858 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 06:09:38,858 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 06:09:38,858 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 06:09:38,869 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:09:38" (1/1) ... [2023-04-01 06:09:38,869 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:09:38" (1/1) ... [2023-04-01 06:09:38,875 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:09:38" (1/1) ... [2023-04-01 06:09:38,876 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:09:38" (1/1) ... [2023-04-01 06:09:38,883 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:09:38" (1/1) ... [2023-04-01 06:09:38,889 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:09:38" (1/1) ... [2023-04-01 06:09:38,891 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:09:38" (1/1) ... [2023-04-01 06:09:38,892 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:09:38" (1/1) ... [2023-04-01 06:09:38,895 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 06:09:38,896 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 06:09:38,896 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 06:09:38,896 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 06:09:38,896 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:09:38" (1/1) ... [2023-04-01 06:09:38,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:09:38,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:09:38,967 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 06:09:38,969 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 06:09:38,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 06:09:38,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 06:09:38,992 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 06:09:38,992 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2023-04-01 06:09:38,992 INFO L138 BoogieDeclarations]: Found implementation of procedure N_generate [2023-04-01 06:09:38,992 INFO L138 BoogieDeclarations]: Found implementation of procedure S1_addsub [2023-04-01 06:09:38,992 INFO L138 BoogieDeclarations]: Found implementation of procedure S2_presdbl [2023-04-01 06:09:38,992 INFO L138 BoogieDeclarations]: Found implementation of procedure S3_zero [2023-04-01 06:09:38,992 INFO L138 BoogieDeclarations]: Found implementation of procedure D_print [2023-04-01 06:09:38,993 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2023-04-01 06:09:38,993 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2023-04-01 06:09:38,993 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 06:09:38,993 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 06:09:38,993 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 06:09:38,993 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 06:09:38,993 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 06:09:38,993 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 06:09:38,993 INFO L130 BoogieDeclarations]: Found specification of procedure error [2023-04-01 06:09:38,993 INFO L130 BoogieDeclarations]: Found specification of procedure N_generate [2023-04-01 06:09:38,993 INFO L130 BoogieDeclarations]: Found specification of procedure S1_addsub [2023-04-01 06:09:38,993 INFO L130 BoogieDeclarations]: Found specification of procedure S2_presdbl [2023-04-01 06:09:38,993 INFO L130 BoogieDeclarations]: Found specification of procedure S3_zero [2023-04-01 06:09:38,994 INFO L130 BoogieDeclarations]: Found specification of procedure D_print [2023-04-01 06:09:38,994 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2023-04-01 06:09:38,994 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2023-04-01 06:09:38,994 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 06:09:38,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 06:09:38,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 06:09:38,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 06:09:38,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 06:09:38,994 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 06:09:38,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 06:09:39,057 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 06:09:39,059 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 06:09:39,477 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 06:09:39,801 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 06:09:39,802 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-01 06:09:39,805 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:09:39 BoogieIcfgContainer [2023-04-01 06:09:39,805 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 06:09:39,806 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 06:09:39,806 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 06:09:39,809 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 06:09:39,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:09:38" (1/3) ... [2023-04-01 06:09:39,809 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@191f6d9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:09:39, skipping insertion in model container [2023-04-01 06:09:39,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:09:38" (2/3) ... [2023-04-01 06:09:39,809 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@191f6d9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:09:39, skipping insertion in model container [2023-04-01 06:09:39,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:09:39" (3/3) ... [2023-04-01 06:09:39,811 INFO L112 eAbstractionObserver]: Analyzing ICFG pipeline.cil-2.c [2023-04-01 06:09:39,822 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 06:09:39,822 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 06:09:39,864 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 06:09:39,873 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;@52a9142a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 06:09:39,874 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 06:09:39,877 INFO L276 IsEmpty]: Start isEmpty. Operand has 66 states, 42 states have (on average 1.619047619047619) internal successors, (68), 50 states have internal predecessors, (68), 12 states have call successors, (12), 10 states have call predecessors, (12), 10 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-01 06:09:39,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 06:09:39,884 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:09:39,885 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:09:39,885 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:09:39,891 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:09:39,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1415396621, now seen corresponding path program 1 times [2023-04-01 06:09:39,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:09:39,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146748469] [2023-04-01 06:09:39,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:09:39,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:09:40,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:09:40,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 06:09:40,180 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:09:40,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146748469] [2023-04-01 06:09:40,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146748469] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 06:09:40,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742397530] [2023-04-01 06:09:40,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:09:40,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:09:40,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:09:40,183 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 06:09:40,184 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 06:09:40,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:09:40,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 1 conjunts are in the unsatisfiable core [2023-04-01 06:09:40,409 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 06:09:40,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 06:09:40,421 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 06:09:40,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742397530] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:09:40,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 06:09:40,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2023-04-01 06:09:40,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893718406] [2023-04-01 06:09:40,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:09:40,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 06:09:40,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:09:40,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 06:09:40,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 06:09:40,467 INFO L87 Difference]: Start difference. First operand has 66 states, 42 states have (on average 1.619047619047619) internal successors, (68), 50 states have internal predecessors, (68), 12 states have call successors, (12), 10 states have call predecessors, (12), 10 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 06:09:40,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:09:40,553 INFO L93 Difference]: Finished difference Result 122 states and 179 transitions. [2023-04-01 06:09:40,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 06:09:40,555 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2023-04-01 06:09:40,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:09:40,560 INFO L225 Difference]: With dead ends: 122 [2023-04-01 06:09:40,560 INFO L226 Difference]: Without dead ends: 62 [2023-04-01 06:09:40,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 06:09:40,572 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:09:40,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 75 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:09:40,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-04-01 06:09:40,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2023-04-01 06:09:40,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 47 states have internal predecessors, (63), 12 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 06:09:40,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 85 transitions. [2023-04-01 06:09:40,625 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 85 transitions. Word has length 21 [2023-04-01 06:09:40,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:09:40,625 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 85 transitions. [2023-04-01 06:09:40,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 06:09:40,626 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 85 transitions. [2023-04-01 06:09:40,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-01 06:09:40,627 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:09:40,627 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:09:40,642 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 06:09:40,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-04-01 06:09:40,839 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:09:40,839 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:09:40,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1777135945, now seen corresponding path program 1 times [2023-04-01 06:09:40,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:09:40,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494564648] [2023-04-01 06:09:40,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:09:40,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:09:40,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:09:41,315 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-01 06:09:41,315 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:09:41,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494564648] [2023-04-01 06:09:41,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494564648] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:09:41,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:09:41,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 06:09:41,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919397256] [2023-04-01 06:09:41,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:09:41,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 06:09:41,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:09:41,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 06:09:41,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 06:09:41,327 INFO L87 Difference]: Start difference. First operand 62 states and 85 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 06:09:41,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:09:41,563 INFO L93 Difference]: Finished difference Result 157 states and 241 transitions. [2023-04-01 06:09:41,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:09:41,563 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 53 [2023-04-01 06:09:41,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:09:41,566 INFO L225 Difference]: With dead ends: 157 [2023-04-01 06:09:41,566 INFO L226 Difference]: Without dead ends: 154 [2023-04-01 06:09:41,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:09:41,567 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 134 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 06:09:41,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 236 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 06:09:41,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2023-04-01 06:09:41,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 143. [2023-04-01 06:09:41,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 102 states have (on average 1.6176470588235294) internal successors, (165), 118 states have internal predecessors, (165), 24 states have call successors, (24), 16 states have call predecessors, (24), 16 states have return successors, (30), 21 states have call predecessors, (30), 22 states have call successors, (30) [2023-04-01 06:09:41,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 219 transitions. [2023-04-01 06:09:41,590 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 219 transitions. Word has length 53 [2023-04-01 06:09:41,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:09:41,591 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 219 transitions. [2023-04-01 06:09:41,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 06:09:41,591 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 219 transitions. [2023-04-01 06:09:41,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-04-01 06:09:41,592 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:09:41,593 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:09:41,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 06:09:41,593 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:09:41,593 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:09:41,593 INFO L85 PathProgramCache]: Analyzing trace with hash 183836052, now seen corresponding path program 1 times [2023-04-01 06:09:41,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:09:41,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011877623] [2023-04-01 06:09:41,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:09:41,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:09:41,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:09:41,757 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 06:09:41,786 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:09:41,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011877623] [2023-04-01 06:09:41,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011877623] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:09:41,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:09:41,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:09:41,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677299281] [2023-04-01 06:09:41,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:09:41,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:09:41,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:09:41,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:09:41,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:09:41,792 INFO L87 Difference]: Start difference. First operand 143 states and 219 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-01 06:09:41,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:09:41,852 INFO L93 Difference]: Finished difference Result 346 states and 557 transitions. [2023-04-01 06:09:41,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:09:41,853 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 64 [2023-04-01 06:09:41,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:09:41,860 INFO L225 Difference]: With dead ends: 346 [2023-04-01 06:09:41,860 INFO L226 Difference]: Without dead ends: 209 [2023-04-01 06:09:41,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 06:09:41,866 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 38 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:09:41,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 142 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:09:41,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2023-04-01 06:09:41,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 208. [2023-04-01 06:09:41,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 147 states have (on average 1.5918367346938775) internal successors, (234), 174 states have internal predecessors, (234), 37 states have call successors, (37), 25 states have call predecessors, (37), 23 states have return successors, (46), 31 states have call predecessors, (46), 35 states have call successors, (46) [2023-04-01 06:09:41,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 317 transitions. [2023-04-01 06:09:41,901 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 317 transitions. Word has length 64 [2023-04-01 06:09:41,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:09:41,902 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 317 transitions. [2023-04-01 06:09:41,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-01 06:09:41,902 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 317 transitions. [2023-04-01 06:09:41,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-04-01 06:09:41,909 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:09:41,910 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:09:41,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 06:09:41,910 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:09:41,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:09:41,911 INFO L85 PathProgramCache]: Analyzing trace with hash 754645497, now seen corresponding path program 1 times [2023-04-01 06:09:41,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:09:41,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827895245] [2023-04-01 06:09:41,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:09:41,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:09:41,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:09:42,070 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 06:09:42,070 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:09:42,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827895245] [2023-04-01 06:09:42,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827895245] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:09:42,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:09:42,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:09:42,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349161535] [2023-04-01 06:09:42,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:09:42,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:09:42,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:09:42,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:09:42,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:09:42,073 INFO L87 Difference]: Start difference. First operand 208 states and 317 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-01 06:09:42,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:09:42,127 INFO L93 Difference]: Finished difference Result 526 states and 835 transitions. [2023-04-01 06:09:42,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:09:42,127 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 65 [2023-04-01 06:09:42,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:09:42,132 INFO L225 Difference]: With dead ends: 526 [2023-04-01 06:09:42,132 INFO L226 Difference]: Without dead ends: 324 [2023-04-01 06:09:42,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 06:09:42,138 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 38 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:09:42,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 168 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:09:42,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2023-04-01 06:09:42,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 323. [2023-04-01 06:09:42,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 230 states have (on average 1.5739130434782609) internal successors, (362), 275 states have internal predecessors, (362), 57 states have call successors, (57), 39 states have call predecessors, (57), 35 states have return successors, (69), 48 states have call predecessors, (69), 55 states have call successors, (69) [2023-04-01 06:09:42,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 488 transitions. [2023-04-01 06:09:42,173 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 488 transitions. Word has length 65 [2023-04-01 06:09:42,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:09:42,173 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 488 transitions. [2023-04-01 06:09:42,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-01 06:09:42,174 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 488 transitions. [2023-04-01 06:09:42,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-04-01 06:09:42,175 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:09:42,175 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:09:42,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 06:09:42,175 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:09:42,176 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:09:42,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1271098503, now seen corresponding path program 1 times [2023-04-01 06:09:42,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:09:42,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654412290] [2023-04-01 06:09:42,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:09:42,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:09:42,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:09:42,270 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 06:09:42,271 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:09:42,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654412290] [2023-04-01 06:09:42,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654412290] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:09:42,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:09:42,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:09:42,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208686268] [2023-04-01 06:09:42,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:09:42,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:09:42,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:09:42,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:09:42,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:09:42,272 INFO L87 Difference]: Start difference. First operand 323 states and 488 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-01 06:09:42,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:09:42,321 INFO L93 Difference]: Finished difference Result 846 states and 1318 transitions. [2023-04-01 06:09:42,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:09:42,321 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 66 [2023-04-01 06:09:42,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:09:42,324 INFO L225 Difference]: With dead ends: 846 [2023-04-01 06:09:42,324 INFO L226 Difference]: Without dead ends: 529 [2023-04-01 06:09:42,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 06:09:42,327 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 39 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:09:42,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 171 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:09:42,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2023-04-01 06:09:42,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 528. [2023-04-01 06:09:42,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 384 states have (on average 1.5546875) internal successors, (597), 458 states have internal predecessors, (597), 88 states have call successors, (88), 61 states have call predecessors, (88), 55 states have return successors, (103), 76 states have call predecessors, (103), 86 states have call successors, (103) [2023-04-01 06:09:42,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 788 transitions. [2023-04-01 06:09:42,353 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 788 transitions. Word has length 66 [2023-04-01 06:09:42,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:09:42,353 INFO L495 AbstractCegarLoop]: Abstraction has 528 states and 788 transitions. [2023-04-01 06:09:42,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-01 06:09:42,353 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 788 transitions. [2023-04-01 06:09:42,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-04-01 06:09:42,355 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:09:42,355 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:09:42,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 06:09:42,356 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:09:42,356 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:09:42,356 INFO L85 PathProgramCache]: Analyzing trace with hash -2145852145, now seen corresponding path program 1 times [2023-04-01 06:09:42,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:09:42,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092931956] [2023-04-01 06:09:42,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:09:42,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:09:42,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:09:43,027 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 06:09:43,027 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:09:43,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092931956] [2023-04-01 06:09:43,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092931956] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 06:09:43,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417315490] [2023-04-01 06:09:43,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:09:43,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:09:43,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:09:43,029 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 06:09:43,032 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 06:09:43,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:09:43,294 INFO L262 TraceCheckSpWp]: Trace formula consists of 1265 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 06:09:43,298 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 06:09:43,342 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-01 06:09:43,342 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 06:09:43,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417315490] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:09:43,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 06:09:43,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [13] total 15 [2023-04-01 06:09:43,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814156727] [2023-04-01 06:09:43,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:09:43,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 06:09:43,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:09:43,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 06:09:43,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2023-04-01 06:09:43,343 INFO L87 Difference]: Start difference. First operand 528 states and 788 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-01 06:09:43,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:09:43,423 INFO L93 Difference]: Finished difference Result 1070 states and 1604 transitions. [2023-04-01 06:09:43,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 06:09:43,424 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 68 [2023-04-01 06:09:43,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:09:43,427 INFO L225 Difference]: With dead ends: 1070 [2023-04-01 06:09:43,427 INFO L226 Difference]: Without dead ends: 548 [2023-04-01 06:09:43,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2023-04-01 06:09:43,431 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 4 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:09:43,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 214 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:09:43,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2023-04-01 06:09:43,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 538. [2023-04-01 06:09:43,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 391 states have (on average 1.5447570332480818) internal successors, (604), 464 states have internal predecessors, (604), 91 states have call successors, (91), 61 states have call predecessors, (91), 55 states have return successors, (109), 80 states have call predecessors, (109), 89 states have call successors, (109) [2023-04-01 06:09:43,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 804 transitions. [2023-04-01 06:09:43,455 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 804 transitions. Word has length 68 [2023-04-01 06:09:43,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:09:43,456 INFO L495 AbstractCegarLoop]: Abstraction has 538 states and 804 transitions. [2023-04-01 06:09:43,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-01 06:09:43,456 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 804 transitions. [2023-04-01 06:09:43,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-04-01 06:09:43,461 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:09:43,461 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2023-04-01 06:09:43,485 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 06:09:43,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-04-01 06:09:43,670 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:09:43,670 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:09:43,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1730842477, now seen corresponding path program 1 times [2023-04-01 06:09:43,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:09:43,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611408915] [2023-04-01 06:09:43,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:09:43,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:09:43,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:09:45,100 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 2 proven. 94 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-01 06:09:45,101 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:09:45,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611408915] [2023-04-01 06:09:45,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611408915] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 06:09:45,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442865744] [2023-04-01 06:09:45,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:09:45,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:09:45,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:09:45,102 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 06:09:45,105 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 06:09:45,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:09:45,517 INFO L262 TraceCheckSpWp]: Trace formula consists of 1938 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 06:09:45,522 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 06:09:45,567 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2023-04-01 06:09:45,568 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 06:09:45,657 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2023-04-01 06:09:45,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442865744] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 06:09:45,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2105037610] [2023-04-01 06:09:45,673 INFO L159 IcfgInterpreter]: Started Sifa with 49 locations of interest [2023-04-01 06:09:45,673 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 06:09:45,675 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 06:09:45,679 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 06:09:45,679 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 06:09:46,399 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 189 for LOIs [2023-04-01 06:10:00,466 WARN L223 SmtUtils]: Spent 12.50s on a formula simplification. DAG size of input: 4622 DAG size of output: 113 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-01 06:10:12,614 WARN L223 SmtUtils]: Spent 12.07s on a formula simplification. DAG size of input: 4622 DAG size of output: 113 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-01 06:10:24,546 WARN L223 SmtUtils]: Spent 11.87s on a formula simplification. DAG size of input: 4622 DAG size of output: 113 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-01 06:10:37,219 WARN L223 SmtUtils]: Spent 12.13s on a formula simplification. DAG size of input: 4622 DAG size of output: 113 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-01 06:10:49,949 WARN L223 SmtUtils]: Spent 12.13s on a formula simplification. DAG size of input: 4622 DAG size of output: 113 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)