/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/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 06:49:30,151 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 06:49:30,152 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 06:49:30,179 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 06:49:30,180 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 06:49:30,181 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 06:49:30,182 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 06:49:30,183 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 06:49:30,184 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 06:49:30,185 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 06:49:30,186 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 06:49:30,187 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 06:49:30,187 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 06:49:30,188 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 06:49:30,189 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 06:49:30,190 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 06:49:30,190 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 06:49:30,191 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 06:49:30,193 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 06:49:30,195 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 06:49:30,196 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 06:49:30,197 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 06:49:30,198 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 06:49:30,199 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 06:49:30,203 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 06:49:30,203 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 06:49:30,203 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 06:49:30,204 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 06:49:30,205 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 06:49:30,205 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 06:49:30,206 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 06:49:30,206 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 06:49:30,207 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 06:49:30,208 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 06:49:30,209 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 06:49:30,209 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 06:49:30,209 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 06:49:30,209 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 06:49:30,210 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 06:49:30,210 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 06:49:30,211 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 06:49:30,212 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-02 06:49:30,232 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 06:49:30,233 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 06:49:30,233 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 06:49:30,233 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 06:49:30,234 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 06:49:30,234 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 06:49:30,234 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 06:49:30,234 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 06:49:30,234 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 06:49:30,235 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 06:49:30,235 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 06:49:30,235 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 06:49:30,235 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 06:49:30,235 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 06:49:30,235 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 06:49:30,235 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 06:49:30,235 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 06:49:30,236 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 06:49:30,236 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 06:49:30,236 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 06:49:30,236 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 06:49:30,236 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 06:49:30,236 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 06:49:30,236 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 06:49:30,236 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 06:49:30,237 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 06:49:30,237 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 06:49:30,237 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 06:49:30,237 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 06:49:30,237 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 06:49:30,237 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 06:49:30,237 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 06:49:30,237 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 06:49:30,238 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 06:49:30,238 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 06:49:30,238 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 06:49:30,455 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 06:49:30,475 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 06:49:30,477 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 06:49:30,478 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 06:49:30,478 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 06:49:30,479 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-02 06:49:31,617 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 06:49:31,858 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 06:49:31,859 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-02 06:49:31,868 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c37fbde87/aa8242bdc15742668ea1b8b92a5d4b7e/FLAG265c14421 [2023-04-02 06:49:31,882 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c37fbde87/aa8242bdc15742668ea1b8b92a5d4b7e [2023-04-02 06:49:31,884 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 06:49:31,885 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 06:49:31,887 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 06:49:31,887 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 06:49:31,890 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 06:49:31,890 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 06:49:31" (1/1) ... [2023-04-02 06:49:31,891 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ee037da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:49:31, skipping insertion in model container [2023-04-02 06:49:31,892 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 06:49:31" (1/1) ... [2023-04-02 06:49:31,898 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 06:49:31,938 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 06:49:32,146 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/seq-mthreaded-reduced/pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7920,7933] [2023-04-02 06:49:32,180 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 06:49:32,201 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 06:49:32,261 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/seq-mthreaded-reduced/pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7920,7933] [2023-04-02 06:49:32,278 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 06:49:32,294 INFO L208 MainTranslator]: Completed translation [2023-04-02 06:49:32,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:49:32 WrapperNode [2023-04-02 06:49:32,295 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 06:49:32,296 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 06:49:32,296 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 06:49:32,296 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 06:49:32,309 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:49:32" (1/1) ... [2023-04-02 06:49:32,310 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:49:32" (1/1) ... [2023-04-02 06:49:32,322 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:49:32" (1/1) ... [2023-04-02 06:49:32,322 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:49:32" (1/1) ... [2023-04-02 06:49:32,338 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:49:32" (1/1) ... [2023-04-02 06:49:32,345 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:49:32" (1/1) ... [2023-04-02 06:49:32,352 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:49:32" (1/1) ... [2023-04-02 06:49:32,355 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:49:32" (1/1) ... [2023-04-02 06:49:32,359 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 06:49:32,360 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 06:49:32,360 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 06:49:32,360 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 06:49:32,361 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:49:32" (1/1) ... [2023-04-02 06:49:32,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 06:49:32,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 06:49:32,410 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 06:49:32,433 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 06:49:32,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 06:49:32,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 06:49:32,451 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 06:49:32,452 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 06:49:32,452 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 06:49:32,452 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 06:49:32,452 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 06:49:32,452 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 06:49:32,452 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 06:49:32,452 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-02 06:49:32,453 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-02 06:49:32,453 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-02 06:49:32,453 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-02 06:49:32,453 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 06:49:32,453 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-02 06:49:32,453 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-02 06:49:32,453 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-02 06:49:32,453 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-02 06:49:32,454 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-02 06:49:32,454 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-02 06:49:32,454 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-02 06:49:32,454 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 06:49:32,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 06:49:32,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 06:49:32,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 06:49:32,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 06:49:32,454 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 06:49:32,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 06:49:32,578 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 06:49:32,580 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 06:49:33,155 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 06:49:33,163 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 06:49:33,163 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-02 06:49:33,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 06:49:33 BoogieIcfgContainer [2023-04-02 06:49:33,165 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 06:49:33,167 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 06:49:33,167 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 06:49:33,169 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 06:49:33,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 06:49:31" (1/3) ... [2023-04-02 06:49:33,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9a37c5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 06:49:33, skipping insertion in model container [2023-04-02 06:49:33,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:49:32" (2/3) ... [2023-04-02 06:49:33,171 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9a37c5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 06:49:33, skipping insertion in model container [2023-04-02 06:49:33,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 06:49:33" (3/3) ... [2023-04-02 06:49:33,172 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-02 06:49:33,184 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 06:49:33,185 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 06:49:33,225 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 06:49:33,231 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=PETRI_NET, 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;@100df9b9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-02 06:49:33,231 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 06:49:33,236 INFO L276 IsEmpty]: Start isEmpty. Operand has 166 states, 154 states have (on average 1.7402597402597402) internal successors, (268), 161 states have internal predecessors, (268), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 06:49:33,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-04-02 06:49:33,245 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:49:33,245 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:49:33,246 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:49:33,249 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:49:33,250 INFO L85 PathProgramCache]: Analyzing trace with hash -32538977, now seen corresponding path program 1 times [2023-04-02 06:49:33,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:49:33,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620523899] [2023-04-02 06:49:33,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:49:33,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:49:33,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:49:33,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:49:33,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:49:33,999 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 06:49:34,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:49:34,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620523899] [2023-04-02 06:49:34,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620523899] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:49:34,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:49:34,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:49:34,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83176261] [2023-04-02 06:49:34,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:49:34,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:49:34,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:49:34,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:49:34,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:49:34,051 INFO L87 Difference]: Start difference. First operand has 166 states, 154 states have (on average 1.7402597402597402) internal successors, (268), 161 states have internal predecessors, (268), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:49:34,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:49:34,916 INFO L93 Difference]: Finished difference Result 364 states and 578 transitions. [2023-04-02 06:49:34,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:49:34,919 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2023-04-02 06:49:34,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:49:34,933 INFO L225 Difference]: With dead ends: 364 [2023-04-02 06:49:34,933 INFO L226 Difference]: Without dead ends: 240 [2023-04-02 06:49:34,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:49:34,942 INFO L413 NwaCegarLoop]: 265 mSDtfsCounter, 161 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-02 06:49:34,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 470 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-02 06:49:34,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2023-04-02 06:49:34,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 237. [2023-04-02 06:49:34,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 233 states have (on average 1.51931330472103) internal successors, (354), 233 states have internal predecessors, (354), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:49:35,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 357 transitions. [2023-04-02 06:49:35,001 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 357 transitions. Word has length 66 [2023-04-02 06:49:35,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:49:35,001 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 357 transitions. [2023-04-02 06:49:35,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:49:35,002 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 357 transitions. [2023-04-02 06:49:35,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-04-02 06:49:35,004 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:49:35,004 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:49:35,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 06:49:35,005 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:49:35,005 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:49:35,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1854086336, now seen corresponding path program 1 times [2023-04-02 06:49:35,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:49:35,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353774991] [2023-04-02 06:49:35,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:49:35,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:49:35,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:49:35,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:49:35,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:49:35,351 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 06:49:35,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:49:35,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353774991] [2023-04-02 06:49:35,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353774991] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:49:35,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:49:35,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:49:35,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249747530] [2023-04-02 06:49:35,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:49:35,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:49:35,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:49:35,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:49:35,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:49:35,356 INFO L87 Difference]: Start difference. First operand 237 states and 357 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:49:35,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:49:35,976 INFO L93 Difference]: Finished difference Result 573 states and 885 transitions. [2023-04-02 06:49:35,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:49:35,977 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2023-04-02 06:49:35,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:49:35,981 INFO L225 Difference]: With dead ends: 573 [2023-04-02 06:49:35,981 INFO L226 Difference]: Without dead ends: 397 [2023-04-02 06:49:35,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:49:35,993 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 128 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:49:35,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 418 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:49:35,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2023-04-02 06:49:36,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 393. [2023-04-02 06:49:36,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 389 states have (on average 1.5347043701799485) internal successors, (597), 389 states have internal predecessors, (597), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:49:36,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 600 transitions. [2023-04-02 06:49:36,055 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 600 transitions. Word has length 68 [2023-04-02 06:49:36,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:49:36,055 INFO L495 AbstractCegarLoop]: Abstraction has 393 states and 600 transitions. [2023-04-02 06:49:36,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:49:36,055 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 600 transitions. [2023-04-02 06:49:36,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-04-02 06:49:36,063 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:49:36,064 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:49:36,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 06:49:36,064 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:49:36,064 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:49:36,064 INFO L85 PathProgramCache]: Analyzing trace with hash -314471455, now seen corresponding path program 1 times [2023-04-02 06:49:36,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:49:36,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775298595] [2023-04-02 06:49:36,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:49:36,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:49:36,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:49:36,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:49:36,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:49:36,330 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 06:49:36,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:49:36,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775298595] [2023-04-02 06:49:36,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775298595] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:49:36,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:49:36,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:49:36,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177266943] [2023-04-02 06:49:36,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:49:36,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:49:36,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:49:36,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:49:36,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:49:36,333 INFO L87 Difference]: Start difference. First operand 393 states and 600 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:49:36,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:49:36,923 INFO L93 Difference]: Finished difference Result 1025 states and 1586 transitions. [2023-04-02 06:49:36,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:49:36,924 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2023-04-02 06:49:36,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:49:36,929 INFO L225 Difference]: With dead ends: 1025 [2023-04-02 06:49:36,929 INFO L226 Difference]: Without dead ends: 693 [2023-04-02 06:49:36,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:49:36,937 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 122 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:49:36,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 419 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:49:36,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2023-04-02 06:49:36,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 687. [2023-04-02 06:49:36,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 683 states have (on average 1.5358711566617862) internal successors, (1049), 683 states have internal predecessors, (1049), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:49:36,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 1052 transitions. [2023-04-02 06:49:36,996 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 1052 transitions. Word has length 70 [2023-04-02 06:49:36,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:49:36,997 INFO L495 AbstractCegarLoop]: Abstraction has 687 states and 1052 transitions. [2023-04-02 06:49:36,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:49:36,998 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 1052 transitions. [2023-04-02 06:49:36,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-02 06:49:36,999 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:49:37,000 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:49:37,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 06:49:37,000 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:49:37,000 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:49:37,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1947624002, now seen corresponding path program 1 times [2023-04-02 06:49:37,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:49:37,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592820119] [2023-04-02 06:49:37,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:49:37,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:49:37,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:49:37,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:49:37,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:49:37,370 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 06:49:37,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:49:37,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592820119] [2023-04-02 06:49:37,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592820119] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:49:37,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:49:37,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 06:49:37,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132299501] [2023-04-02 06:49:37,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:49:37,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:49:37,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:49:37,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:49:37,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:49:37,374 INFO L87 Difference]: Start difference. First operand 687 states and 1052 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 5 states have internal predecessors, (69), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:49:38,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:49:38,178 INFO L93 Difference]: Finished difference Result 2961 states and 4630 transitions. [2023-04-02 06:49:38,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 06:49:38,178 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 5 states have internal predecessors, (69), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2023-04-02 06:49:38,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:49:38,189 INFO L225 Difference]: With dead ends: 2961 [2023-04-02 06:49:38,189 INFO L226 Difference]: Without dead ends: 2325 [2023-04-02 06:49:38,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-04-02 06:49:38,192 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 975 mSDsluCounter, 1162 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 975 SdHoareTripleChecker+Valid, 1388 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:49:38,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [975 Valid, 1388 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:49:38,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2325 states. [2023-04-02 06:49:38,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2325 to 1215. [2023-04-02 06:49:38,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1215 states, 1211 states have (on average 1.5549132947976878) internal successors, (1883), 1211 states have internal predecessors, (1883), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:49:38,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 1886 transitions. [2023-04-02 06:49:38,306 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 1886 transitions. Word has length 72 [2023-04-02 06:49:38,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:49:38,306 INFO L495 AbstractCegarLoop]: Abstraction has 1215 states and 1886 transitions. [2023-04-02 06:49:38,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 5 states have internal predecessors, (69), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:49:38,307 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 1886 transitions. [2023-04-02 06:49:38,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-02 06:49:38,308 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:49:38,308 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:49:38,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 06:49:38,308 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:49:38,309 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:49:38,309 INFO L85 PathProgramCache]: Analyzing trace with hash 185191483, now seen corresponding path program 1 times [2023-04-02 06:49:38,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:49:38,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471795025] [2023-04-02 06:49:38,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:49:38,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:49:38,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:49:38,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:49:38,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:49:38,594 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 06:49:38,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:49:38,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471795025] [2023-04-02 06:49:38,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471795025] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:49:38,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:49:38,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 06:49:38,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591088998] [2023-04-02 06:49:38,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:49:38,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 06:49:38,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:49:38,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 06:49:38,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:49:38,603 INFO L87 Difference]: Start difference. First operand 1215 states and 1886 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:49:39,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:49:39,377 INFO L93 Difference]: Finished difference Result 3539 states and 5547 transitions. [2023-04-02 06:49:39,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 06:49:39,378 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2023-04-02 06:49:39,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:49:39,390 INFO L225 Difference]: With dead ends: 3539 [2023-04-02 06:49:39,391 INFO L226 Difference]: Without dead ends: 2385 [2023-04-02 06:49:39,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-02 06:49:39,397 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 434 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:49:39,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [434 Valid, 684 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:49:39,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2385 states. [2023-04-02 06:49:39,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2385 to 1788. [2023-04-02 06:49:39,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1788 states, 1784 states have (on average 1.5571748878923768) internal successors, (2778), 1784 states have internal predecessors, (2778), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:49:39,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1788 states to 1788 states and 2781 transitions. [2023-04-02 06:49:39,549 INFO L78 Accepts]: Start accepts. Automaton has 1788 states and 2781 transitions. Word has length 73 [2023-04-02 06:49:39,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:49:39,550 INFO L495 AbstractCegarLoop]: Abstraction has 1788 states and 2781 transitions. [2023-04-02 06:49:39,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:49:39,550 INFO L276 IsEmpty]: Start isEmpty. Operand 1788 states and 2781 transitions. [2023-04-02 06:49:39,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-04-02 06:49:39,551 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:49:39,551 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:49:39,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-02 06:49:39,552 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:49:39,552 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:49:39,552 INFO L85 PathProgramCache]: Analyzing trace with hash -2073097267, now seen corresponding path program 1 times [2023-04-02 06:49:39,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:49:39,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437680183] [2023-04-02 06:49:39,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:49:39,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:49:39,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:49:39,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:49:39,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:49:39,812 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 06:49:39,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:49:39,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437680183] [2023-04-02 06:49:39,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437680183] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:49:39,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:49:39,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:49:39,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018865884] [2023-04-02 06:49:39,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:49:39,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:49:39,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:49:39,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:49:39,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:49:39,814 INFO L87 Difference]: Start difference. First operand 1788 states and 2781 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 3 states have internal predecessors, (73), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:49:40,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:49:40,619 INFO L93 Difference]: Finished difference Result 3628 states and 5652 transitions. [2023-04-02 06:49:40,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:49:40,620 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 3 states have internal predecessors, (73), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2023-04-02 06:49:40,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:49:40,630 INFO L225 Difference]: With dead ends: 3628 [2023-04-02 06:49:40,630 INFO L226 Difference]: Without dead ends: 2636 [2023-04-02 06:49:40,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:49:40,633 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 121 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:49:40,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 445 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:49:40,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2636 states. [2023-04-02 06:49:40,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2636 to 2634. [2023-04-02 06:49:40,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2634 states, 2630 states have (on average 1.5456273764258555) internal successors, (4065), 2630 states have internal predecessors, (4065), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:49:40,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2634 states to 2634 states and 4068 transitions. [2023-04-02 06:49:40,863 INFO L78 Accepts]: Start accepts. Automaton has 2634 states and 4068 transitions. Word has length 76 [2023-04-02 06:49:40,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:49:40,863 INFO L495 AbstractCegarLoop]: Abstraction has 2634 states and 4068 transitions. [2023-04-02 06:49:40,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 3 states have internal predecessors, (73), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:49:40,864 INFO L276 IsEmpty]: Start isEmpty. Operand 2634 states and 4068 transitions. [2023-04-02 06:49:40,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-04-02 06:49:40,870 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:49:40,870 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:49:40,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-02 06:49:40,871 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:49:40,871 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:49:40,871 INFO L85 PathProgramCache]: Analyzing trace with hash -137335905, now seen corresponding path program 1 times [2023-04-02 06:49:40,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:49:40,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762558176] [2023-04-02 06:49:40,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:49:40,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:49:40,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:49:41,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:49:41,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:49:41,104 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 06:49:41,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:49:41,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762558176] [2023-04-02 06:49:41,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762558176] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:49:41,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:49:41,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:49:41,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126573679] [2023-04-02 06:49:41,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:49:41,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:49:41,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:49:41,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:49:41,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:49:41,107 INFO L87 Difference]: Start difference. First operand 2634 states and 4068 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 3 states have internal predecessors, (73), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:49:42,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:49:42,007 INFO L93 Difference]: Finished difference Result 4912 states and 7610 transitions. [2023-04-02 06:49:42,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:49:42,007 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 3 states have internal predecessors, (73), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2023-04-02 06:49:42,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:49:42,022 INFO L225 Difference]: With dead ends: 4912 [2023-04-02 06:49:42,022 INFO L226 Difference]: Without dead ends: 3503 [2023-04-02 06:49:42,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:49:42,029 INFO L413 NwaCegarLoop]: 292 mSDtfsCounter, 127 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 06:49:42,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 485 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 06:49:42,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3503 states. [2023-04-02 06:49:42,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3503 to 3501. [2023-04-02 06:49:42,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3501 states, 3497 states have (on average 1.537031741492708) internal successors, (5375), 3497 states have internal predecessors, (5375), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:49:42,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3501 states to 3501 states and 5378 transitions. [2023-04-02 06:49:42,335 INFO L78 Accepts]: Start accepts. Automaton has 3501 states and 5378 transitions. Word has length 76 [2023-04-02 06:49:42,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:49:42,335 INFO L495 AbstractCegarLoop]: Abstraction has 3501 states and 5378 transitions. [2023-04-02 06:49:42,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 3 states have internal predecessors, (73), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:49:42,335 INFO L276 IsEmpty]: Start isEmpty. Operand 3501 states and 5378 transitions. [2023-04-02 06:49:42,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-04-02 06:49:42,336 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:49:42,336 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:49:42,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-02 06:49:42,337 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:49:42,337 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:49:42,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1585910769, now seen corresponding path program 1 times [2023-04-02 06:49:42,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:49:42,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408493256] [2023-04-02 06:49:42,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:49:42,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:49:42,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:49:42,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:49:42,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:49:42,595 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 06:49:42,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:49:42,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408493256] [2023-04-02 06:49:42,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408493256] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:49:42,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:49:42,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:49:42,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909181025] [2023-04-02 06:49:42,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:49:42,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:49:42,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:49:42,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:49:42,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:49:42,597 INFO L87 Difference]: Start difference. First operand 3501 states and 5378 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 3 states have internal predecessors, (73), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:49:43,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:49:43,683 INFO L93 Difference]: Finished difference Result 7470 states and 11484 transitions. [2023-04-02 06:49:43,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:49:43,684 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 3 states have internal predecessors, (73), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2023-04-02 06:49:43,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:49:43,703 INFO L225 Difference]: With dead ends: 7470 [2023-04-02 06:49:43,703 INFO L226 Difference]: Without dead ends: 5008 [2023-04-02 06:49:43,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:49:43,710 INFO L413 NwaCegarLoop]: 328 mSDtfsCounter, 133 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 06:49:43,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 520 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 06:49:43,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5008 states. [2023-04-02 06:49:44,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5008 to 5006. [2023-04-02 06:49:44,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5006 states, 5002 states have (on average 1.5217912834866054) internal successors, (7612), 5002 states have internal predecessors, (7612), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:49:44,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5006 states to 5006 states and 7615 transitions. [2023-04-02 06:49:44,144 INFO L78 Accepts]: Start accepts. Automaton has 5006 states and 7615 transitions. Word has length 76 [2023-04-02 06:49:44,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:49:44,144 INFO L495 AbstractCegarLoop]: Abstraction has 5006 states and 7615 transitions. [2023-04-02 06:49:44,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 3 states have internal predecessors, (73), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:49:44,145 INFO L276 IsEmpty]: Start isEmpty. Operand 5006 states and 7615 transitions. [2023-04-02 06:49:44,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-04-02 06:49:44,146 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:49:44,146 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:49:44,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-02 06:49:44,146 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:49:44,146 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:49:44,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1794680655, now seen corresponding path program 1 times [2023-04-02 06:49:44,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:49:44,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134915906] [2023-04-02 06:49:44,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:49:44,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:49:44,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:49:44,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:49:44,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:49:44,564 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 06:49:44,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:49:44,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134915906] [2023-04-02 06:49:44,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134915906] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:49:44,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:49:44,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 06:49:44,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879097433] [2023-04-02 06:49:44,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:49:44,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:49:44,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:49:44,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:49:44,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:49:44,569 INFO L87 Difference]: Start difference. First operand 5006 states and 7615 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 5 states have internal predecessors, (78), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:49:45,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:49:45,764 INFO L93 Difference]: Finished difference Result 8327 states and 12584 transitions. [2023-04-02 06:49:45,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:49:45,765 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 5 states have internal predecessors, (78), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2023-04-02 06:49:45,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:49:45,813 INFO L225 Difference]: With dead ends: 8327 [2023-04-02 06:49:45,813 INFO L226 Difference]: Without dead ends: 8325 [2023-04-02 06:49:45,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-02 06:49:45,820 INFO L413 NwaCegarLoop]: 314 mSDtfsCounter, 278 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 1082 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-02 06:49:45,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 1082 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-02 06:49:45,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8325 states. [2023-04-02 06:49:46,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8325 to 5110. [2023-04-02 06:49:46,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5110 states, 5106 states have (on average 1.5058754406580495) internal successors, (7689), 5106 states have internal predecessors, (7689), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:49:46,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5110 states to 5110 states and 7692 transitions. [2023-04-02 06:49:46,444 INFO L78 Accepts]: Start accepts. Automaton has 5110 states and 7692 transitions. Word has length 81 [2023-04-02 06:49:46,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:49:46,445 INFO L495 AbstractCegarLoop]: Abstraction has 5110 states and 7692 transitions. [2023-04-02 06:49:46,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 5 states have internal predecessors, (78), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:49:46,445 INFO L276 IsEmpty]: Start isEmpty. Operand 5110 states and 7692 transitions. [2023-04-02 06:49:46,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-04-02 06:49:46,447 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:49:46,447 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:49:46,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-02 06:49:46,447 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:49:46,448 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:49:46,448 INFO L85 PathProgramCache]: Analyzing trace with hash -646569457, now seen corresponding path program 1 times [2023-04-02 06:49:46,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:49:46,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757359069] [2023-04-02 06:49:46,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:49:46,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:49:46,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:49:46,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:49:46,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:49:46,767 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-02 06:49:46,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:49:46,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757359069] [2023-04-02 06:49:46,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757359069] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:49:46,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:49:46,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 06:49:46,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729524875] [2023-04-02 06:49:46,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:49:46,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:49:46,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:49:46,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:49:46,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:49:46,770 INFO L87 Difference]: Start difference. First operand 5110 states and 7692 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 5 states have internal predecessors, (91), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:49:48,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:49:48,272 INFO L93 Difference]: Finished difference Result 14739 states and 22216 transitions. [2023-04-02 06:49:48,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:49:48,273 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 5 states have internal predecessors, (91), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 107 [2023-04-02 06:49:48,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:49:48,295 INFO L225 Difference]: With dead ends: 14739 [2023-04-02 06:49:48,295 INFO L226 Difference]: Without dead ends: 11335 [2023-04-02 06:49:48,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-04-02 06:49:48,303 INFO L413 NwaCegarLoop]: 374 mSDtfsCounter, 556 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 982 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-02 06:49:48,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [556 Valid, 982 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-02 06:49:48,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11335 states. [2023-04-02 06:49:49,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11335 to 8212. [2023-04-02 06:49:49,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8212 states, 8208 states have (on average 1.5031676413255362) internal successors, (12338), 8208 states have internal predecessors, (12338), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:49:49,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8212 states to 8212 states and 12341 transitions. [2023-04-02 06:49:49,091 INFO L78 Accepts]: Start accepts. Automaton has 8212 states and 12341 transitions. Word has length 107 [2023-04-02 06:49:49,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:49:49,091 INFO L495 AbstractCegarLoop]: Abstraction has 8212 states and 12341 transitions. [2023-04-02 06:49:49,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 5 states have internal predecessors, (91), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:49:49,092 INFO L276 IsEmpty]: Start isEmpty. Operand 8212 states and 12341 transitions. [2023-04-02 06:49:49,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-04-02 06:49:49,094 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:49:49,094 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:49:49,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-02 06:49:49,094 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:49:49,095 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:49:49,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1289191905, now seen corresponding path program 1 times [2023-04-02 06:49:49,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:49:49,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99791726] [2023-04-02 06:49:49,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:49:49,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:49:49,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:49:49,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:49:49,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:49:49,412 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 06:49:49,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:49:49,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99791726] [2023-04-02 06:49:49,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99791726] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:49:49,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:49:49,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 06:49:49,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438440160] [2023-04-02 06:49:49,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:49:49,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:49:49,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:49:49,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:49:49,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:49:49,415 INFO L87 Difference]: Start difference. First operand 8212 states and 12341 transitions. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 5 states have internal predecessors, (97), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:49:50,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:49:50,991 INFO L93 Difference]: Finished difference Result 16688 states and 25146 transitions. [2023-04-02 06:49:50,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:49:50,992 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 5 states have internal predecessors, (97), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 107 [2023-04-02 06:49:50,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:49:51,026 INFO L225 Difference]: With dead ends: 16688 [2023-04-02 06:49:51,027 INFO L226 Difference]: Without dead ends: 13284 [2023-04-02 06:49:51,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-04-02 06:49:51,039 INFO L413 NwaCegarLoop]: 375 mSDtfsCounter, 552 mSDsluCounter, 679 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 552 SdHoareTripleChecker+Valid, 1054 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 06:49:51,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [552 Valid, 1054 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 06:49:51,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13284 states. [2023-04-02 06:49:52,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13284 to 12312. [2023-04-02 06:49:52,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12312 states, 12308 states have (on average 1.501462463438414) internal successors, (18480), 12308 states have internal predecessors, (18480), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:49:52,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12312 states to 12312 states and 18483 transitions. [2023-04-02 06:49:52,229 INFO L78 Accepts]: Start accepts. Automaton has 12312 states and 18483 transitions. Word has length 107 [2023-04-02 06:49:52,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:49:52,229 INFO L495 AbstractCegarLoop]: Abstraction has 12312 states and 18483 transitions. [2023-04-02 06:49:52,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 5 states have internal predecessors, (97), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:49:52,230 INFO L276 IsEmpty]: Start isEmpty. Operand 12312 states and 18483 transitions. [2023-04-02 06:49:52,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-04-02 06:49:52,232 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:49:52,232 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:49:52,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-02 06:49:52,232 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:49:52,233 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:49:52,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1282528717, now seen corresponding path program 1 times [2023-04-02 06:49:52,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:49:52,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951053354] [2023-04-02 06:49:52,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:49:52,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:49:52,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:49:52,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:49:52,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:49:52,546 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 06:49:52,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:49:52,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951053354] [2023-04-02 06:49:52,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951053354] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:49:52,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:49:52,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 06:49:52,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586737904] [2023-04-02 06:49:52,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:49:52,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:49:52,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:49:52,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:49:52,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:49:52,548 INFO L87 Difference]: Start difference. First operand 12312 states and 18483 transitions. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 5 states have internal predecessors, (103), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:49:54,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:49:54,283 INFO L93 Difference]: Finished difference Result 17228 states and 25977 transitions. [2023-04-02 06:49:54,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:49:54,284 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 5 states have internal predecessors, (103), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 107 [2023-04-02 06:49:54,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:49:54,319 INFO L225 Difference]: With dead ends: 17228 [2023-04-02 06:49:54,319 INFO L226 Difference]: Without dead ends: 15102 [2023-04-02 06:49:54,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-04-02 06:49:54,328 INFO L413 NwaCegarLoop]: 367 mSDtfsCounter, 549 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 1016 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 06:49:54,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [549 Valid, 1016 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 06:49:54,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15102 states. [2023-04-02 06:49:55,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15102 to 14184. [2023-04-02 06:49:55,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14184 states, 14180 states have (on average 1.5033850493653031) internal successors, (21318), 14180 states have internal predecessors, (21318), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:49:55,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14184 states to 14184 states and 21321 transitions. [2023-04-02 06:49:55,592 INFO L78 Accepts]: Start accepts. Automaton has 14184 states and 21321 transitions. Word has length 107 [2023-04-02 06:49:55,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:49:55,593 INFO L495 AbstractCegarLoop]: Abstraction has 14184 states and 21321 transitions. [2023-04-02 06:49:55,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 5 states have internal predecessors, (103), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:49:55,593 INFO L276 IsEmpty]: Start isEmpty. Operand 14184 states and 21321 transitions. [2023-04-02 06:49:55,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-04-02 06:49:55,596 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:49:55,596 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:49:55,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-02 06:49:55,597 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:49:55,597 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:49:55,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1761236715, now seen corresponding path program 1 times [2023-04-02 06:49:55,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:49:55,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855192893] [2023-04-02 06:49:55,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:49:55,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:49:55,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:49:55,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:49:55,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:49:55,861 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 06:49:55,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:49:55,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855192893] [2023-04-02 06:49:55,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855192893] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:49:55,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:49:55,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:49:55,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783395036] [2023-04-02 06:49:55,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:49:55,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:49:55,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:49:55,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:49:55,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:49:55,863 INFO L87 Difference]: Start difference. First operand 14184 states and 21321 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 3 states have internal predecessors, (104), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:49:58,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:49:58,313 INFO L93 Difference]: Finished difference Result 30628 states and 46209 transitions. [2023-04-02 06:49:58,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:49:58,314 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 3 states have internal predecessors, (104), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 108 [2023-04-02 06:49:58,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:49:58,348 INFO L225 Difference]: With dead ends: 30628 [2023-04-02 06:49:58,349 INFO L226 Difference]: Without dead ends: 22784 [2023-04-02 06:49:58,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:49:58,366 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 112 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:49:58,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 410 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:49:58,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22784 states. [2023-04-02 06:50:00,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22784 to 22732. [2023-04-02 06:50:00,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22732 states, 22728 states have (on average 1.504047870468145) internal successors, (34184), 22728 states have internal predecessors, (34184), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:50:00,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22732 states to 22732 states and 34187 transitions. [2023-04-02 06:50:00,343 INFO L78 Accepts]: Start accepts. Automaton has 22732 states and 34187 transitions. Word has length 108 [2023-04-02 06:50:00,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:50:00,345 INFO L495 AbstractCegarLoop]: Abstraction has 22732 states and 34187 transitions. [2023-04-02 06:50:00,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 3 states have internal predecessors, (104), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:50:00,345 INFO L276 IsEmpty]: Start isEmpty. Operand 22732 states and 34187 transitions. [2023-04-02 06:50:00,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-04-02 06:50:00,348 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:50:00,348 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:50:00,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-02 06:50:00,348 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:50:00,349 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:50:00,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1165294998, now seen corresponding path program 1 times [2023-04-02 06:50:00,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:50:00,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283014699] [2023-04-02 06:50:00,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:50:00,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:50:00,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:50:00,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:50:00,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:50:00,654 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 06:50:00,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:50:00,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283014699] [2023-04-02 06:50:00,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283014699] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:50:00,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:50:00,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 06:50:00,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389806948] [2023-04-02 06:50:00,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:50:00,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 06:50:00,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:50:00,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 06:50:00,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:50:00,656 INFO L87 Difference]: Start difference. First operand 22732 states and 34187 transitions. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 4 states have internal predecessors, (104), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:50:03,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:50:03,807 INFO L93 Difference]: Finished difference Result 38538 states and 58163 transitions. [2023-04-02 06:50:03,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 06:50:03,807 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 4 states have internal predecessors, (104), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 108 [2023-04-02 06:50:03,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:50:03,858 INFO L225 Difference]: With dead ends: 38538 [2023-04-02 06:50:03,858 INFO L226 Difference]: Without dead ends: 30561 [2023-04-02 06:50:03,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:50:03,881 INFO L413 NwaCegarLoop]: 364 mSDtfsCounter, 251 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 726 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-02 06:50:03,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 726 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-02 06:50:03,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30561 states. [2023-04-02 06:50:06,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30561 to 28756. [2023-04-02 06:50:06,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28756 states, 28752 states have (on average 1.502747634947134) internal successors, (43207), 28752 states have internal predecessors, (43207), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:50:06,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28756 states to 28756 states and 43210 transitions. [2023-04-02 06:50:06,596 INFO L78 Accepts]: Start accepts. Automaton has 28756 states and 43210 transitions. Word has length 108 [2023-04-02 06:50:06,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:50:06,596 INFO L495 AbstractCegarLoop]: Abstraction has 28756 states and 43210 transitions. [2023-04-02 06:50:06,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 4 states have internal predecessors, (104), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:50:06,597 INFO L276 IsEmpty]: Start isEmpty. Operand 28756 states and 43210 transitions. [2023-04-02 06:50:06,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-04-02 06:50:06,601 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:50:06,601 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:50:06,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-02 06:50:06,601 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:50:06,602 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:50:06,602 INFO L85 PathProgramCache]: Analyzing trace with hash -73846543, now seen corresponding path program 1 times [2023-04-02 06:50:06,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:50:06,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436170354] [2023-04-02 06:50:06,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:50:06,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:50:06,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:50:06,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:50:06,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:50:06,862 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:50:06,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:50:06,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436170354] [2023-04-02 06:50:06,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436170354] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:50:06,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:50:06,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:50:06,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666420955] [2023-04-02 06:50:06,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:50:06,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:50:06,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:50:06,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:50:06,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:50:06,864 INFO L87 Difference]: Start difference. First operand 28756 states and 43210 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 3 states have internal predecessors, (106), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:50:12,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:50:12,332 INFO L93 Difference]: Finished difference Result 84357 states and 126500 transitions. [2023-04-02 06:50:12,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:50:12,332 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 3 states have internal predecessors, (106), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 109 [2023-04-02 06:50:12,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:50:12,452 INFO L225 Difference]: With dead ends: 84357 [2023-04-02 06:50:12,452 INFO L226 Difference]: Without dead ends: 55682 [2023-04-02 06:50:12,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:50:12,495 INFO L413 NwaCegarLoop]: 292 mSDtfsCounter, 154 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 06:50:12,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 511 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 06:50:12,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55682 states. [2023-04-02 06:50:17,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55682 to 55680. [2023-04-02 06:50:17,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55680 states, 55676 states have (on average 1.4879840505783462) internal successors, (82845), 55676 states have internal predecessors, (82845), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:50:17,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55680 states to 55680 states and 82848 transitions. [2023-04-02 06:50:17,961 INFO L78 Accepts]: Start accepts. Automaton has 55680 states and 82848 transitions. Word has length 109 [2023-04-02 06:50:17,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:50:17,962 INFO L495 AbstractCegarLoop]: Abstraction has 55680 states and 82848 transitions. [2023-04-02 06:50:17,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 3 states have internal predecessors, (106), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:50:17,962 INFO L276 IsEmpty]: Start isEmpty. Operand 55680 states and 82848 transitions. [2023-04-02 06:50:17,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-04-02 06:50:17,966 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:50:17,966 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:50:17,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-02 06:50:17,966 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:50:17,966 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:50:17,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1455225659, now seen corresponding path program 1 times [2023-04-02 06:50:17,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:50:17,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418649379] [2023-04-02 06:50:17,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:50:17,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:50:17,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:50:18,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:50:18,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:50:18,210 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:50:18,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:50:18,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418649379] [2023-04-02 06:50:18,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418649379] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:50:18,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:50:18,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:50:18,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396103561] [2023-04-02 06:50:18,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:50:18,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:50:18,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:50:18,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:50:18,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:50:18,214 INFO L87 Difference]: Start difference. First operand 55680 states and 82848 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 3 states have internal predecessors, (106), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:50:28,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:50:28,936 INFO L93 Difference]: Finished difference Result 163263 states and 242361 transitions. [2023-04-02 06:50:28,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:50:28,937 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 3 states have internal predecessors, (106), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 109 [2023-04-02 06:50:28,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:50:29,176 INFO L225 Difference]: With dead ends: 163263 [2023-04-02 06:50:29,176 INFO L226 Difference]: Without dead ends: 107743 [2023-04-02 06:50:29,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:50:29,253 INFO L413 NwaCegarLoop]: 330 mSDtfsCounter, 173 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-02 06:50:29,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 549 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-02 06:50:29,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107743 states. [2023-04-02 06:50:40,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107743 to 107741. [2023-04-02 06:50:40,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107741 states, 107737 states have (on average 1.4723075637895988) internal successors, (158622), 107737 states have internal predecessors, (158622), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:50:40,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107741 states to 107741 states and 158625 transitions. [2023-04-02 06:50:40,730 INFO L78 Accepts]: Start accepts. Automaton has 107741 states and 158625 transitions. Word has length 109 [2023-04-02 06:50:40,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:50:40,730 INFO L495 AbstractCegarLoop]: Abstraction has 107741 states and 158625 transitions. [2023-04-02 06:50:40,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 3 states have internal predecessors, (106), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:50:40,731 INFO L276 IsEmpty]: Start isEmpty. Operand 107741 states and 158625 transitions. [2023-04-02 06:50:40,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-04-02 06:50:40,737 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:50:40,737 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:50:40,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-04-02 06:50:40,737 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:50:40,738 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:50:40,738 INFO L85 PathProgramCache]: Analyzing trace with hash -2076546674, now seen corresponding path program 1 times [2023-04-02 06:50:40,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:50:40,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104653922] [2023-04-02 06:50:40,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:50:40,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:50:40,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:50:40,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:50:40,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:50:40,940 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-02 06:50:40,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:50:40,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104653922] [2023-04-02 06:50:40,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104653922] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:50:40,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:50:40,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:50:40,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854562539] [2023-04-02 06:50:40,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:50:40,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:50:40,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:50:40,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:50:40,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:50:40,942 INFO L87 Difference]: Start difference. First operand 107741 states and 158625 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 3 states have internal predecessors, (96), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:50:57,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:50:57,197 INFO L93 Difference]: Finished difference Result 256243 states and 378805 transitions. [2023-04-02 06:50:57,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 06:50:57,198 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 3 states have internal predecessors, (96), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 110 [2023-04-02 06:50:57,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:50:57,725 INFO L225 Difference]: With dead ends: 256243 [2023-04-02 06:50:57,725 INFO L226 Difference]: Without dead ends: 148781 [2023-04-02 06:50:57,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:50:57,844 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 132 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 06:50:57,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 439 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 06:50:57,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148781 states. [2023-04-02 06:51:12,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148781 to 143571. [2023-04-02 06:51:12,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143571 states, 143567 states have (on average 1.460809238891946) internal successors, (209724), 143567 states have internal predecessors, (209724), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:51:13,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143571 states to 143571 states and 209727 transitions. [2023-04-02 06:51:13,057 INFO L78 Accepts]: Start accepts. Automaton has 143571 states and 209727 transitions. Word has length 110 [2023-04-02 06:51:13,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:51:13,057 INFO L495 AbstractCegarLoop]: Abstraction has 143571 states and 209727 transitions. [2023-04-02 06:51:13,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 3 states have internal predecessors, (96), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:51:13,057 INFO L276 IsEmpty]: Start isEmpty. Operand 143571 states and 209727 transitions. [2023-04-02 06:51:13,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-04-02 06:51:13,064 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:51:13,064 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:51:13,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-04-02 06:51:13,064 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:51:13,064 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:51:13,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1038664530, now seen corresponding path program 1 times [2023-04-02 06:51:13,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:51:13,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405694114] [2023-04-02 06:51:13,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:51:13,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:51:13,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:51:13,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:51:13,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:51:13,285 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-02 06:51:13,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:51:13,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405694114] [2023-04-02 06:51:13,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405694114] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:51:13,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:51:13,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:51:13,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130610666] [2023-04-02 06:51:13,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:51:13,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:51:13,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:51:13,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:51:13,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:51:13,287 INFO L87 Difference]: Start difference. First operand 143571 states and 209727 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 3 states have internal predecessors, (102), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)