/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/eca-rers2012/Problem13_label29.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 19:30:51,122 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 19:30:51,124 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 19:30:51,155 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 19:30:51,155 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 19:30:51,158 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 19:30:51,161 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 19:30:51,164 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 19:30:51,166 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 19:30:51,171 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 19:30:51,173 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 19:30:51,174 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 19:30:51,175 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 19:30:51,179 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 19:30:51,181 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 19:30:51,182 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 19:30:51,182 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 19:30:51,183 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 19:30:51,185 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 19:30:51,191 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 19:30:51,192 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 19:30:51,193 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 19:30:51,195 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 19:30:51,196 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 19:30:51,200 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 19:30:51,200 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 19:30:51,200 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 19:30:51,202 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 19:30:51,202 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 19:30:51,203 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 19:30:51,203 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 19:30:51,204 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 19:30:51,205 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 19:30:51,206 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 19:30:51,206 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 19:30:51,207 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 19:30:51,207 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 19:30:51,207 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 19:30:51,207 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 19:30:51,208 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 19:30:51,208 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 19:30:51,210 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 [2023-04-02 19:30:51,245 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 19:30:51,245 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 19:30:51,245 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 19:30:51,245 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 19:30:51,246 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 19:30:51,246 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 19:30:51,246 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 19:30:51,247 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 19:30:51,247 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 19:30:51,247 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 19:30:51,247 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 19:30:51,248 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 19:30:51,248 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 19:30:51,248 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 19:30:51,248 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 19:30:51,248 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 19:30:51,248 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 19:30:51,248 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 19:30:51,249 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 19:30:51,249 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 19:30:51,249 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 19:30:51,249 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 19:30:51,249 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 19:30:51,250 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 19:30:51,250 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 19:30:51,250 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 19:30:51,250 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 19:30:51,250 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 19:30:51,250 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 19:30:51,250 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 19:30:51,251 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 19:30:51,251 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 19:30:51,251 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 19:30:51,251 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 19:30:51,251 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 19:30:51,251 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 19:30:51,251 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 19:30:51,252 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 19:30:51,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 19:30:51,252 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 19:30:51,252 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 19:30:51,252 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 19:30:51,510 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 19:30:51,539 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 19:30:51,541 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 19:30:51,543 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 19:30:51,543 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 19:30:51,544 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label29.c [2023-04-02 19:30:52,719 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 19:30:53,199 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 19:30:53,199 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label29.c [2023-04-02 19:30:53,229 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5d533626/1613a63d36dc4f4487a05999a17ed0b1/FLAG6ea0494ec [2023-04-02 19:30:53,243 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5d533626/1613a63d36dc4f4487a05999a17ed0b1 [2023-04-02 19:30:53,247 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 19:30:53,248 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 19:30:53,250 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 19:30:53,250 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 19:30:53,252 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 19:30:53,253 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 07:30:53" (1/1) ... [2023-04-02 19:30:53,254 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d2aaf74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:30:53, skipping insertion in model container [2023-04-02 19:30:53,255 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 07:30:53" (1/1) ... [2023-04-02 19:30:53,260 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 19:30:53,373 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 19:30:53,577 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label29.c[2333,2346] [2023-04-02 19:30:54,386 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 19:30:54,399 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 19:30:54,421 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label29.c[2333,2346] [2023-04-02 19:30:54,904 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 19:30:54,927 INFO L208 MainTranslator]: Completed translation [2023-04-02 19:30:54,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:30:54 WrapperNode [2023-04-02 19:30:54,927 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 19:30:54,928 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 19:30:54,928 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 19:30:54,928 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 19:30:54,938 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:30:54" (1/1) ... [2023-04-02 19:30:54,939 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:30:54" (1/1) ... [2023-04-02 19:30:54,996 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:30:54" (1/1) ... [2023-04-02 19:30:54,997 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:30:54" (1/1) ... [2023-04-02 19:30:55,185 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:30:54" (1/1) ... [2023-04-02 19:30:55,211 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:30:54" (1/1) ... [2023-04-02 19:30:55,280 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:30:54" (1/1) ... [2023-04-02 19:30:55,295 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:30:54" (1/1) ... [2023-04-02 19:30:55,347 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 19:30:55,348 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 19:30:55,349 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 19:30:55,349 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 19:30:55,350 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:30:54" (1/1) ... [2023-04-02 19:30:55,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 19:30:55,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 19:30:55,378 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) [2023-04-02 19:30:55,402 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 [2023-04-02 19:30:55,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 19:30:55,420 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 19:30:55,420 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 19:30:55,420 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-02 19:30:55,420 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-02 19:30:55,420 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-02 19:30:55,420 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-02 19:30:55,420 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 19:30:55,420 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-02 19:30:55,420 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-02 19:30:55,420 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-02 19:30:55,420 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-02 19:30:55,420 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 19:30:55,421 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 19:30:55,421 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 19:30:55,421 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 19:30:55,421 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 19:30:55,421 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 19:30:55,421 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 19:30:55,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 19:30:55,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 19:30:55,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 19:30:55,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 19:30:55,421 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 19:30:55,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 19:30:55,515 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 19:30:55,517 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 19:31:00,333 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 19:31:03,080 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 19:31:03,080 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 19:31:03,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 07:31:03 BoogieIcfgContainer [2023-04-02 19:31:03,084 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 19:31:03,086 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 19:31:03,086 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 19:31:03,089 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 19:31:03,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 07:30:53" (1/3) ... [2023-04-02 19:31:03,089 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63684d38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 07:31:03, skipping insertion in model container [2023-04-02 19:31:03,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:30:54" (2/3) ... [2023-04-02 19:31:03,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63684d38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 07:31:03, skipping insertion in model container [2023-04-02 19:31:03,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 07:31:03" (3/3) ... [2023-04-02 19:31:03,091 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label29.c [2023-04-02 19:31:03,106 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 19:31:03,106 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 19:31:03,158 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 19:31:03,163 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;@54fb728, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 19:31:03,163 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 19:31:03,170 INFO L276 IsEmpty]: Start isEmpty. Operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 19:31:03,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-02 19:31:03,176 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:31:03,177 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 19:31:03,177 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:31:03,273 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:31:03,273 INFO L85 PathProgramCache]: Analyzing trace with hash -330938060, now seen corresponding path program 1 times [2023-04-02 19:31:03,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:31:03,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94313425] [2023-04-02 19:31:03,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:31:03,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:31:03,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:31:03,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 19:31:03,587 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:31:03,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94313425] [2023-04-02 19:31:03,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94313425] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:31:03,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 19:31:03,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 19:31:03,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129195532] [2023-04-02 19:31:03,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:31:03,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 19:31:03,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:31:03,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 19:31:03,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 19:31:03,632 INFO L87 Difference]: Start difference. First operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 19:31:07,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:31:07,021 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-04-02 19:31:07,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 19:31:07,023 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 [2023-04-02 19:31:07,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:31:07,043 INFO L225 Difference]: With dead ends: 2068 [2023-04-02 19:31:07,043 INFO L226 Difference]: Without dead ends: 1371 [2023-04-02 19:31:07,051 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 [2023-04-02 19:31:07,059 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 735 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2367 mSolverCounterSat, 436 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 735 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 2803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 436 IncrementalHoareTripleChecker+Valid, 2367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-04-02 19:31:07,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [735 Valid, 178 Invalid, 2803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [436 Valid, 2367 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-04-02 19:31:07,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-04-02 19:31:07,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1365. [2023-04-02 19:31:07,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1365 states, 1347 states have (on average 1.8574610244988865) internal successors, (2502), 1347 states have internal predecessors, (2502), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2023-04-02 19:31:07,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1365 states to 1365 states and 2525 transitions. [2023-04-02 19:31:07,169 INFO L78 Accepts]: Start accepts. Automaton has 1365 states and 2525 transitions. Word has length 11 [2023-04-02 19:31:07,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:31:07,169 INFO L495 AbstractCegarLoop]: Abstraction has 1365 states and 2525 transitions. [2023-04-02 19:31:07,170 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) [2023-04-02 19:31:07,170 INFO L276 IsEmpty]: Start isEmpty. Operand 1365 states and 2525 transitions. [2023-04-02 19:31:07,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-02 19:31:07,171 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:31:07,171 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 19:31:07,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 19:31:07,171 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:31:07,172 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:31:07,172 INFO L85 PathProgramCache]: Analyzing trace with hash 162771333, now seen corresponding path program 1 times [2023-04-02 19:31:07,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:31:07,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672619744] [2023-04-02 19:31:07,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:31:07,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:31:07,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:31:07,383 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 19:31:07,384 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:31:07,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672619744] [2023-04-02 19:31:07,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672619744] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:31:07,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 19:31:07,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 19:31:07,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262816811] [2023-04-02 19:31:07,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:31:07,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 19:31:07,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:31:07,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 19:31:07,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 19:31:07,387 INFO L87 Difference]: Start difference. First operand 1365 states and 2525 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 19:31:11,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:31:11,907 INFO L93 Difference]: Finished difference Result 4150 states and 7698 transitions. [2023-04-02 19:31:11,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 19:31:11,909 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 [2023-04-02 19:31:11,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:31:11,924 INFO L225 Difference]: With dead ends: 4150 [2023-04-02 19:31:11,924 INFO L226 Difference]: Without dead ends: 2790 [2023-04-02 19:31:11,933 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 [2023-04-02 19:31:11,936 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 2455 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 3743 mSolverCounterSat, 1165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2455 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 4908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1165 IncrementalHoareTripleChecker+Valid, 3743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-04-02 19:31:11,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2455 Valid, 109 Invalid, 4908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1165 Valid, 3743 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-04-02 19:31:11,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2790 states. [2023-04-02 19:31:12,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2790 to 2749. [2023-04-02 19:31:12,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2749 states, 2702 states have (on average 1.5906735751295338) internal successors, (4298), 2708 states have internal predecessors, (4298), 15 states have call successors, (15), 15 states have call predecessors, (15), 31 states have return successors, (79), 25 states have call predecessors, (79), 14 states have call successors, (79) [2023-04-02 19:31:12,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2749 states to 2749 states and 4392 transitions. [2023-04-02 19:31:12,038 INFO L78 Accepts]: Start accepts. Automaton has 2749 states and 4392 transitions. Word has length 21 [2023-04-02 19:31:12,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:31:12,038 INFO L495 AbstractCegarLoop]: Abstraction has 2749 states and 4392 transitions. [2023-04-02 19:31:12,039 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) [2023-04-02 19:31:12,039 INFO L276 IsEmpty]: Start isEmpty. Operand 2749 states and 4392 transitions. [2023-04-02 19:31:12,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-02 19:31:12,040 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:31:12,040 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 19:31:12,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 19:31:12,040 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:31:12,042 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:31:12,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1085119327, now seen corresponding path program 1 times [2023-04-02 19:31:12,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:31:12,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12823900] [2023-04-02 19:31:12,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:31:12,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:31:12,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:31:12,196 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 19:31:12,196 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:31:12,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12823900] [2023-04-02 19:31:12,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12823900] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:31:12,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 19:31:12,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 19:31:12,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583196238] [2023-04-02 19:31:12,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:31:12,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 19:31:12,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:31:12,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 19:31:12,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 19:31:12,200 INFO L87 Difference]: Start difference. First operand 2749 states and 4392 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 19:31:17,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:31:17,086 INFO L93 Difference]: Finished difference Result 8429 states and 13621 transitions. [2023-04-02 19:31:17,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 19:31:17,097 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2023-04-02 19:31:17,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:31:17,124 INFO L225 Difference]: With dead ends: 8429 [2023-04-02 19:31:17,124 INFO L226 Difference]: Without dead ends: 5685 [2023-04-02 19:31:17,132 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 [2023-04-02 19:31:17,136 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 2178 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 4872 mSolverCounterSat, 859 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2178 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 5731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 859 IncrementalHoareTripleChecker+Valid, 4872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2023-04-02 19:31:17,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2178 Valid, 134 Invalid, 5731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [859 Valid, 4872 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2023-04-02 19:31:17,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5685 states. [2023-04-02 19:31:17,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5685 to 5634. [2023-04-02 19:31:17,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5634 states, 5490 states have (on average 1.3936247723132968) internal successors, (7651), 5522 states have internal predecessors, (7651), 27 states have call successors, (27), 27 states have call predecessors, (27), 116 states have return successors, (373), 84 states have call predecessors, (373), 26 states have call successors, (373) [2023-04-02 19:31:17,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5634 states to 5634 states and 8051 transitions. [2023-04-02 19:31:17,309 INFO L78 Accepts]: Start accepts. Automaton has 5634 states and 8051 transitions. Word has length 23 [2023-04-02 19:31:17,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:31:17,310 INFO L495 AbstractCegarLoop]: Abstraction has 5634 states and 8051 transitions. [2023-04-02 19:31:17,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 19:31:17,310 INFO L276 IsEmpty]: Start isEmpty. Operand 5634 states and 8051 transitions. [2023-04-02 19:31:17,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-02 19:31:17,312 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:31:17,312 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 19:31:17,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 19:31:17,312 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:31:17,320 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:31:17,320 INFO L85 PathProgramCache]: Analyzing trace with hash -372670942, now seen corresponding path program 1 times [2023-04-02 19:31:17,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:31:17,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196783781] [2023-04-02 19:31:17,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:31:17,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:31:17,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:31:17,532 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 19:31:17,533 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:31:17,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196783781] [2023-04-02 19:31:17,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196783781] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 19:31:17,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350672641] [2023-04-02 19:31:17,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:31:17,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 19:31:17,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 19:31:17,541 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) [2023-04-02 19:31:17,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 19:31:17,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:31:17,645 INFO L262 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 19:31:17,651 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 19:31:17,766 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 19:31:17,767 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 19:31:17,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350672641] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:31:17,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 19:31:17,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-02 19:31:17,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054375641] [2023-04-02 19:31:17,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:31:17,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 19:31:17,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:31:17,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 19:31:17,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-02 19:31:17,768 INFO L87 Difference]: Start difference. First operand 5634 states and 8051 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 19:31:22,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:31:22,451 INFO L93 Difference]: Finished difference Result 17148 states and 25308 transitions. [2023-04-02 19:31:22,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 19:31:22,451 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 41 [2023-04-02 19:31:22,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:31:22,500 INFO L225 Difference]: With dead ends: 17148 [2023-04-02 19:31:22,500 INFO L226 Difference]: Without dead ends: 11519 [2023-04-02 19:31:22,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-04-02 19:31:22,518 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 2040 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 4472 mSolverCounterSat, 1062 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2040 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 5534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1062 IncrementalHoareTripleChecker+Valid, 4472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-04-02 19:31:22,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2040 Valid, 103 Invalid, 5534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1062 Valid, 4472 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2023-04-02 19:31:22,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11519 states. [2023-04-02 19:31:22,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11519 to 10645. [2023-04-02 19:31:22,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10645 states, 10328 states have (on average 1.2570681642137878) internal successors, (12983), 10410 states have internal predecessors, (12983), 49 states have call successors, (49), 49 states have call predecessors, (49), 267 states have return successors, (1161), 185 states have call predecessors, (1161), 48 states have call successors, (1161) [2023-04-02 19:31:22,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10645 states to 10645 states and 14193 transitions. [2023-04-02 19:31:22,784 INFO L78 Accepts]: Start accepts. Automaton has 10645 states and 14193 transitions. Word has length 41 [2023-04-02 19:31:22,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:31:22,785 INFO L495 AbstractCegarLoop]: Abstraction has 10645 states and 14193 transitions. [2023-04-02 19:31:22,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 19:31:22,785 INFO L276 IsEmpty]: Start isEmpty. Operand 10645 states and 14193 transitions. [2023-04-02 19:31:22,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-04-02 19:31:22,793 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:31:22,793 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 19:31:22,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 19:31:23,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 19:31:23,001 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:31:23,001 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:31:23,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1671877472, now seen corresponding path program 1 times [2023-04-02 19:31:23,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:31:23,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128770799] [2023-04-02 19:31:23,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:31:23,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:31:23,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:31:23,378 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 19:31:23,379 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:31:23,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128770799] [2023-04-02 19:31:23,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128770799] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:31:23,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 19:31:23,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 19:31:23,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891646092] [2023-04-02 19:31:23,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:31:23,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 19:31:23,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:31:23,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 19:31:23,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 19:31:23,385 INFO L87 Difference]: Start difference. First operand 10645 states and 14193 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 19:31:27,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:31:27,138 INFO L93 Difference]: Finished difference Result 19470 states and 26419 transitions. [2023-04-02 19:31:27,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 19:31:27,139 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 70 [2023-04-02 19:31:27,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:31:27,184 INFO L225 Difference]: With dead ends: 19470 [2023-04-02 19:31:27,184 INFO L226 Difference]: Without dead ends: 11208 [2023-04-02 19:31:27,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-02 19:31:27,207 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 2075 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 4339 mSolverCounterSat, 566 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2075 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 4905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 566 IncrementalHoareTripleChecker+Valid, 4339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-04-02 19:31:27,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2075 Valid, 102 Invalid, 4905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [566 Valid, 4339 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-04-02 19:31:27,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11208 states. [2023-04-02 19:31:27,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11208 to 11031. [2023-04-02 19:31:27,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11031 states, 10655 states have (on average 1.2474894415767246) internal successors, (13292), 10757 states have internal predecessors, (13292), 50 states have call successors, (50), 50 states have call predecessors, (50), 325 states have return successors, (1320), 223 states have call predecessors, (1320), 49 states have call successors, (1320) [2023-04-02 19:31:27,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11031 states to 11031 states and 14662 transitions. [2023-04-02 19:31:27,498 INFO L78 Accepts]: Start accepts. Automaton has 11031 states and 14662 transitions. Word has length 70 [2023-04-02 19:31:27,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:31:27,499 INFO L495 AbstractCegarLoop]: Abstraction has 11031 states and 14662 transitions. [2023-04-02 19:31:27,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 19:31:27,500 INFO L276 IsEmpty]: Start isEmpty. Operand 11031 states and 14662 transitions. [2023-04-02 19:31:27,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-02 19:31:27,503 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:31:27,503 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 19:31:27,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-02 19:31:27,503 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:31:27,504 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:31:27,504 INFO L85 PathProgramCache]: Analyzing trace with hash -653270397, now seen corresponding path program 1 times [2023-04-02 19:31:27,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:31:27,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765161808] [2023-04-02 19:31:27,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:31:27,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:31:27,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:31:27,684 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-02 19:31:27,685 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:31:27,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765161808] [2023-04-02 19:31:27,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765161808] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:31:27,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 19:31:27,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 19:31:27,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443749189] [2023-04-02 19:31:27,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:31:27,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 19:31:27,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:31:27,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 19:31:27,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 19:31:27,687 INFO L87 Difference]: Start difference. First operand 11031 states and 14662 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 19:31:30,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:31:30,604 INFO L93 Difference]: Finished difference Result 23589 states and 32571 transitions. [2023-04-02 19:31:30,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 19:31:30,606 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 75 [2023-04-02 19:31:30,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:31:30,644 INFO L225 Difference]: With dead ends: 23589 [2023-04-02 19:31:30,645 INFO L226 Difference]: Without dead ends: 13145 [2023-04-02 19:31:30,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 19:31:30,665 INFO L413 NwaCegarLoop]: 959 mSDtfsCounter, 852 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 2069 mSolverCounterSat, 654 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 852 SdHoareTripleChecker+Valid, 987 SdHoareTripleChecker+Invalid, 2723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 654 IncrementalHoareTripleChecker+Valid, 2069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-04-02 19:31:30,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [852 Valid, 987 Invalid, 2723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [654 Valid, 2069 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-04-02 19:31:30,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13145 states. [2023-04-02 19:31:30,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13145 to 13021. [2023-04-02 19:31:30,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13021 states, 12627 states have (on average 1.2280826799714897) internal successors, (15507), 12730 states have internal predecessors, (15507), 59 states have call successors, (59), 59 states have call predecessors, (59), 334 states have return successors, (1510), 231 states have call predecessors, (1510), 58 states have call successors, (1510) [2023-04-02 19:31:30,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13021 states to 13021 states and 17076 transitions. [2023-04-02 19:31:30,915 INFO L78 Accepts]: Start accepts. Automaton has 13021 states and 17076 transitions. Word has length 75 [2023-04-02 19:31:30,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:31:30,917 INFO L495 AbstractCegarLoop]: Abstraction has 13021 states and 17076 transitions. [2023-04-02 19:31:30,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 19:31:30,917 INFO L276 IsEmpty]: Start isEmpty. Operand 13021 states and 17076 transitions. [2023-04-02 19:31:30,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-04-02 19:31:30,919 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:31:30,920 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 19:31:30,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-02 19:31:30,920 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:31:30,920 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:31:30,920 INFO L85 PathProgramCache]: Analyzing trace with hash 10148571, now seen corresponding path program 1 times [2023-04-02 19:31:30,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:31:30,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675018547] [2023-04-02 19:31:30,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:31:30,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:31:30,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:31:31,099 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-04-02 19:31:31,099 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:31:31,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675018547] [2023-04-02 19:31:31,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675018547] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:31:31,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 19:31:31,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 19:31:31,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345830249] [2023-04-02 19:31:31,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:31:31,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 19:31:31,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:31:31,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 19:31:31,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 19:31:31,102 INFO L87 Difference]: Start difference. First operand 13021 states and 17076 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 19:31:34,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:31:34,110 INFO L93 Difference]: Finished difference Result 32361 states and 44837 transitions. [2023-04-02 19:31:34,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 19:31:34,111 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 79 [2023-04-02 19:31:34,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:31:34,179 INFO L225 Difference]: With dead ends: 32361 [2023-04-02 19:31:34,180 INFO L226 Difference]: Without dead ends: 19927 [2023-04-02 19:31:34,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 19:31:34,213 INFO L413 NwaCegarLoop]: 1236 mSDtfsCounter, 674 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 2237 mSolverCounterSat, 633 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 674 SdHoareTripleChecker+Valid, 1264 SdHoareTripleChecker+Invalid, 2870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 633 IncrementalHoareTripleChecker+Valid, 2237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-04-02 19:31:34,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [674 Valid, 1264 Invalid, 2870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [633 Valid, 2237 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-04-02 19:31:34,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19927 states. [2023-04-02 19:31:34,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19927 to 19713. [2023-04-02 19:31:34,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19713 states, 19195 states have (on average 1.1824954415212294) internal successors, (22698), 19330 states have internal predecessors, (22698), 89 states have call successors, (89), 89 states have call predecessors, (89), 428 states have return successors, (2612), 293 states have call predecessors, (2612), 88 states have call successors, (2612) [2023-04-02 19:31:34,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19713 states to 19713 states and 25399 transitions. [2023-04-02 19:31:34,580 INFO L78 Accepts]: Start accepts. Automaton has 19713 states and 25399 transitions. Word has length 79 [2023-04-02 19:31:34,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:31:34,580 INFO L495 AbstractCegarLoop]: Abstraction has 19713 states and 25399 transitions. [2023-04-02 19:31:34,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 19:31:34,581 INFO L276 IsEmpty]: Start isEmpty. Operand 19713 states and 25399 transitions. [2023-04-02 19:31:34,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-04-02 19:31:34,582 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:31:34,582 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 19:31:34,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-02 19:31:34,582 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:31:34,582 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:31:34,582 INFO L85 PathProgramCache]: Analyzing trace with hash -257608684, now seen corresponding path program 1 times [2023-04-02 19:31:34,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:31:34,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539207610] [2023-04-02 19:31:34,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:31:34,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:31:34,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:31:34,850 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 54 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-04-02 19:31:34,850 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:31:34,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539207610] [2023-04-02 19:31:34,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539207610] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 19:31:34,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378426143] [2023-04-02 19:31:34,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:31:34,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 19:31:34,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 19:31:34,852 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) [2023-04-02 19:31:34,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 19:31:35,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:31:35,006 INFO L262 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-02 19:31:35,011 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 19:31:35,153 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-04-02 19:31:35,153 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 19:31:35,467 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-04-02 19:31:35,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378426143] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-02 19:31:35,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-02 19:31:35,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 9 [2023-04-02 19:31:35,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165331454] [2023-04-02 19:31:35,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:31:35,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 19:31:35,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:31:35,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 19:31:35,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-04-02 19:31:35,470 INFO L87 Difference]: Start difference. First operand 19713 states and 25399 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 19:31:39,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:31:39,364 INFO L93 Difference]: Finished difference Result 55249 states and 74040 transitions. [2023-04-02 19:31:39,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 19:31:39,372 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 85 [2023-04-02 19:31:39,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:31:39,492 INFO L225 Difference]: With dead ends: 55249 [2023-04-02 19:31:39,492 INFO L226 Difference]: Without dead ends: 36123 [2023-04-02 19:31:39,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 162 SyntacticMatches, 9 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-04-02 19:31:39,540 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 1622 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 3805 mSolverCounterSat, 814 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1622 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 4619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 814 IncrementalHoareTripleChecker+Valid, 3805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-04-02 19:31:39,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1622 Valid, 102 Invalid, 4619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [814 Valid, 3805 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-04-02 19:31:39,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36123 states. [2023-04-02 19:31:40,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36123 to 35295. [2023-04-02 19:31:40,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35295 states, 34152 states have (on average 1.1531681892714922) internal successors, (39383), 34513 states have internal predecessors, (39383), 156 states have call successors, (156), 156 states have call predecessors, (156), 986 states have return successors, (6109), 625 states have call predecessors, (6109), 155 states have call successors, (6109) [2023-04-02 19:31:40,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35295 states to 35295 states and 45648 transitions. [2023-04-02 19:31:40,158 INFO L78 Accepts]: Start accepts. Automaton has 35295 states and 45648 transitions. Word has length 85 [2023-04-02 19:31:40,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:31:40,159 INFO L495 AbstractCegarLoop]: Abstraction has 35295 states and 45648 transitions. [2023-04-02 19:31:40,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 19:31:40,159 INFO L276 IsEmpty]: Start isEmpty. Operand 35295 states and 45648 transitions. [2023-04-02 19:31:40,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-04-02 19:31:40,160 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:31:40,160 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2023-04-02 19:31:40,168 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-02 19:31:40,368 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,SelfDestructingSolverStorable7 [2023-04-02 19:31:40,368 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:31:40,368 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:31:40,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1398778758, now seen corresponding path program 1 times [2023-04-02 19:31:40,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:31:40,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768428923] [2023-04-02 19:31:40,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:31:40,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:31:40,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:31:40,546 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 75 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-02 19:31:40,547 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:31:40,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768428923] [2023-04-02 19:31:40,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768428923] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 19:31:40,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31243822] [2023-04-02 19:31:40,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:31:40,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 19:31:40,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 19:31:40,548 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) [2023-04-02 19:31:40,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 19:31:40,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:31:40,695 INFO L262 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 19:31:40,701 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 19:31:40,754 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 75 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-02 19:31:40,755 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 19:31:40,863 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 75 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-02 19:31:40,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31243822] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 19:31:40,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [665055863] [2023-04-02 19:31:40,885 INFO L159 IcfgInterpreter]: Started Sifa with 41 locations of interest [2023-04-02 19:31:40,885 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 19:31:40,887 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 19:31:40,891 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 19:31:40,892 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 19:31:41,043 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 49 for LOIs [2023-04-02 19:31:41,143 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2023-04-02 19:31:41,191 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 7336 conjuctions. This might take some time... [2023-04-02 19:31:41,521 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 218 conjuctions. [2023-04-02 19:32:11,386 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 53