/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_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 05:56:54,197 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 05:56:54,199 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 05:56:54,230 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 05:56:54,230 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 05:56:54,232 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 05:56:54,234 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 05:56:54,236 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 05:56:54,237 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 05:56:54,241 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 05:56:54,242 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 05:56:54,243 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 05:56:54,243 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 05:56:54,245 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 05:56:54,245 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 05:56:54,246 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 05:56:54,247 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 05:56:54,247 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 05:56:54,249 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 05:56:54,253 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 05:56:54,253 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 05:56:54,254 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 05:56:54,255 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 05:56:54,256 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 05:56:54,262 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 05:56:54,262 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 05:56:54,262 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 05:56:54,263 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 05:56:54,263 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 05:56:54,264 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 05:56:54,264 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 05:56:54,264 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 05:56:54,265 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 05:56:54,266 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 05:56:54,266 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 05:56:54,266 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 05:56:54,267 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 05:56:54,267 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 05:56:54,267 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 05:56:54,267 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 05:56:54,268 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 05:56:54,269 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 05:56:54,291 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 05:56:54,291 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 05:56:54,291 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 05:56:54,292 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 05:56:54,292 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 05:56:54,293 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 05:56:54,293 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 05:56:54,293 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 05:56:54,293 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 05:56:54,293 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 05:56:54,294 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 05:56:54,294 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 05:56:54,294 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 05:56:54,294 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 05:56:54,294 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 05:56:54,294 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 05:56:54,294 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 05:56:54,294 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 05:56:54,295 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 05:56:54,295 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 05:56:54,295 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 05:56:54,295 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 05:56:54,295 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 05:56:54,295 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 05:56:54,295 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 05:56:54,295 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 05:56:54,295 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 05:56:54,296 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 05:56:54,296 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 05:56:54,296 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 05:56:54,296 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 05:56:54,296 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 05:56:54,296 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 05:56:54,296 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 05:56:54,296 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 05:56:54,296 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 05:56:54,497 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 05:56:54,514 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 05:56:54,518 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 05:56:54,519 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 05:56:54,519 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 05:56:54,520 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2023-04-02 05:56:55,630 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 05:56:55,969 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 05:56:55,969 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2023-04-02 05:56:55,984 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97db745d0/0a363edce74047b5950293e3989ba06b/FLAGe43b04a94 [2023-04-02 05:56:56,269 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97db745d0/0a363edce74047b5950293e3989ba06b [2023-04-02 05:56:56,271 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 05:56:56,277 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 05:56:56,278 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 05:56:56,293 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 05:56:56,295 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 05:56:56,296 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 05:56:56" (1/1) ... [2023-04-02 05:56:56,296 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59cc22c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 05:56:56, skipping insertion in model container [2023-04-02 05:56:56,297 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 05:56:56" (1/1) ... [2023-04-02 05:56:56,301 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 05:56:56,358 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 05:56:56,599 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_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c[21751,21764] [2023-04-02 05:56:56,711 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 05:56:56,729 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 05:56:56,861 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_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c[21751,21764] [2023-04-02 05:56:56,912 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 05:56:56,929 INFO L208 MainTranslator]: Completed translation [2023-04-02 05:56:56,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 05:56:56 WrapperNode [2023-04-02 05:56:56,929 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 05:56:56,930 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 05:56:56,930 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 05:56:56,930 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 05:56:56,938 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 05:56:56" (1/1) ... [2023-04-02 05:56:56,938 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 05:56:56" (1/1) ... [2023-04-02 05:56:56,955 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 05:56:56" (1/1) ... [2023-04-02 05:56:56,955 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 05:56:56" (1/1) ... [2023-04-02 05:56:56,988 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 05:56:56" (1/1) ... [2023-04-02 05:56:57,039 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 05:56:56" (1/1) ... [2023-04-02 05:56:57,046 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 05:56:56" (1/1) ... [2023-04-02 05:56:57,057 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 05:56:56" (1/1) ... [2023-04-02 05:56:57,076 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 05:56:57,077 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 05:56:57,077 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 05:56:57,077 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 05:56:57,078 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 05:56:56" (1/1) ... [2023-04-02 05:56:57,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 05:56:57,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 05:56:57,126 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 05:56:57,147 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 05:56:57,160 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 05:56:57,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 05:56:57,162 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 05:56:57,162 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 05:56:57,162 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 05:56:57,162 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 05:56:57,162 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 05:56:57,162 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 05:56:57,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 05:56:57,162 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-02 05:56:57,162 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-02 05:56:57,162 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-02 05:56:57,162 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 05:56:57,162 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-02 05:56:57,162 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-02 05:56:57,163 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-02 05:56:57,163 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-02 05:56:57,163 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-02 05:56:57,163 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-02 05:56:57,163 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2023-04-02 05:56:57,163 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-02 05:56:57,163 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-02 05:56:57,163 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 05:56:57,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 05:56:57,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 05:56:57,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 05:56:57,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 05:56:57,163 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 05:56:57,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 05:56:57,358 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 05:56:57,360 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 05:56:58,562 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 05:56:58,570 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 05:56:58,570 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-02 05:56:58,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 05:56:58 BoogieIcfgContainer [2023-04-02 05:56:58,572 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 05:56:58,573 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 05:56:58,573 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 05:56:58,575 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 05:56:58,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 05:56:56" (1/3) ... [2023-04-02 05:56:58,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@378708e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 05:56:58, skipping insertion in model container [2023-04-02 05:56:58,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 05:56:56" (2/3) ... [2023-04-02 05:56:58,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@378708e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 05:56:58, skipping insertion in model container [2023-04-02 05:56:58,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 05:56:58" (3/3) ... [2023-04-02 05:56:58,577 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2023-04-02 05:56:58,588 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 05:56:58,588 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 05:56:58,637 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 05:56:58,642 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;@302dfd05, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-02 05:56:58,642 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 05:56:58,649 INFO L276 IsEmpty]: Start isEmpty. Operand has 749 states, 735 states have (on average 1.8408163265306123) internal successors, (1353), 744 states have internal predecessors, (1353), 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 05:56:58,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2023-04-02 05:56:58,673 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 05:56:58,673 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:56:58,674 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 05:56:58,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 05:56:58,677 INFO L85 PathProgramCache]: Analyzing trace with hash -2039642604, now seen corresponding path program 1 times [2023-04-02 05:56:58,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 05:56:58,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662936371] [2023-04-02 05:56:58,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 05:56:58,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 05:56:58,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:56:59,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 05:56:59,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:56:59,794 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 05:56:59,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 05:56:59,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662936371] [2023-04-02 05:56:59,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662936371] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 05:56:59,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 05:56:59,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 05:56:59,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899146740] [2023-04-02 05:56:59,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 05:56:59,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 05:56:59,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 05:56:59,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 05:56:59,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 05:56:59,834 INFO L87 Difference]: Start difference. First operand has 749 states, 735 states have (on average 1.8408163265306123) internal successors, (1353), 744 states have internal predecessors, (1353), 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 51.25) internal successors, (205), 3 states have internal predecessors, (205), 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 05:57:03,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 05:57:03,383 INFO L93 Difference]: Finished difference Result 1138 states and 1990 transitions. [2023-04-02 05:57:03,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 05:57:03,385 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 51.25) internal successors, (205), 3 states have internal predecessors, (205), 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 208 [2023-04-02 05:57:03,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 05:57:03,404 INFO L225 Difference]: With dead ends: 1138 [2023-04-02 05:57:03,404 INFO L226 Difference]: Without dead ends: 913 [2023-04-02 05:57:03,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 05:57:03,413 INFO L413 NwaCegarLoop]: 1356 mSDtfsCounter, 343 mSDsluCounter, 1250 mSDsCounter, 0 mSdLazyCounter, 1381 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 2606 SdHoareTripleChecker+Invalid, 1387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-04-02 05:57:03,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 2606 Invalid, 1387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1381 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-04-02 05:57:03,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2023-04-02 05:57:03,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 911. [2023-04-02 05:57:03,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 907 states have (on average 1.7254685777287762) internal successors, (1565), 907 states have internal predecessors, (1565), 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 05:57:03,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 1568 transitions. [2023-04-02 05:57:03,493 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 1568 transitions. Word has length 208 [2023-04-02 05:57:03,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 05:57:03,496 INFO L495 AbstractCegarLoop]: Abstraction has 911 states and 1568 transitions. [2023-04-02 05:57:03,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.25) internal successors, (205), 3 states have internal predecessors, (205), 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 05:57:03,496 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 1568 transitions. [2023-04-02 05:57:03,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2023-04-02 05:57:03,503 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 05:57:03,504 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:57:03,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 05:57:03,504 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 05:57:03,505 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 05:57:03,505 INFO L85 PathProgramCache]: Analyzing trace with hash 723489073, now seen corresponding path program 1 times [2023-04-02 05:57:03,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 05:57:03,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87554985] [2023-04-02 05:57:03,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 05:57:03,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 05:57:03,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:57:04,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 05:57:04,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:57:04,351 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 05:57:04,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 05:57:04,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87554985] [2023-04-02 05:57:04,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87554985] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 05:57:04,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 05:57:04,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 05:57:04,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424107296] [2023-04-02 05:57:04,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 05:57:04,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 05:57:04,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 05:57:04,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 05:57:04,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 05:57:04,356 INFO L87 Difference]: Start difference. First operand 911 states and 1568 transitions. Second operand has 4 states, 4 states have (on average 52.25) internal successors, (209), 3 states have internal predecessors, (209), 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 05:57:07,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 05:57:07,584 INFO L93 Difference]: Finished difference Result 1617 states and 2728 transitions. [2023-04-02 05:57:07,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 05:57:07,585 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.25) internal successors, (209), 3 states have internal predecessors, (209), 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 212 [2023-04-02 05:57:07,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 05:57:07,591 INFO L225 Difference]: With dead ends: 1617 [2023-04-02 05:57:07,592 INFO L226 Difference]: Without dead ends: 1253 [2023-04-02 05:57:07,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 05:57:07,594 INFO L413 NwaCegarLoop]: 1277 mSDtfsCounter, 285 mSDsluCounter, 1227 mSDsCounter, 0 mSdLazyCounter, 1288 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 2504 SdHoareTripleChecker+Invalid, 1290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-04-02 05:57:07,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 2504 Invalid, 1290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1288 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-04-02 05:57:07,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1253 states. [2023-04-02 05:57:07,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1253 to 1251. [2023-04-02 05:57:07,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 1247 states have (on average 1.7008821170809945) internal successors, (2121), 1247 states have internal predecessors, (2121), 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 05:57:07,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 2124 transitions. [2023-04-02 05:57:07,633 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 2124 transitions. Word has length 212 [2023-04-02 05:57:07,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 05:57:07,634 INFO L495 AbstractCegarLoop]: Abstraction has 1251 states and 2124 transitions. [2023-04-02 05:57:07,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.25) internal successors, (209), 3 states have internal predecessors, (209), 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 05:57:07,635 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 2124 transitions. [2023-04-02 05:57:07,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2023-04-02 05:57:07,637 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 05:57:07,637 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:57:07,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 05:57:07,638 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 05:57:07,638 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 05:57:07,638 INFO L85 PathProgramCache]: Analyzing trace with hash -217843404, now seen corresponding path program 1 times [2023-04-02 05:57:07,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 05:57:07,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473534067] [2023-04-02 05:57:07,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 05:57:07,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 05:57:07,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:57:08,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 05:57:08,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:57:08,410 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 05:57:08,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 05:57:08,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473534067] [2023-04-02 05:57:08,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473534067] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 05:57:08,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 05:57:08,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 05:57:08,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888247105] [2023-04-02 05:57:08,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 05:57:08,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 05:57:08,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 05:57:08,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 05:57:08,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 05:57:08,413 INFO L87 Difference]: Start difference. First operand 1251 states and 2124 transitions. Second operand has 4 states, 4 states have (on average 53.25) internal successors, (213), 3 states have internal predecessors, (213), 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 05:57:11,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 05:57:11,812 INFO L93 Difference]: Finished difference Result 2615 states and 4354 transitions. [2023-04-02 05:57:11,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 05:57:11,813 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 53.25) internal successors, (213), 3 states have internal predecessors, (213), 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 216 [2023-04-02 05:57:11,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 05:57:11,818 INFO L225 Difference]: With dead ends: 2615 [2023-04-02 05:57:11,819 INFO L226 Difference]: Without dead ends: 1911 [2023-04-02 05:57:11,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 05:57:11,821 INFO L413 NwaCegarLoop]: 1418 mSDtfsCounter, 278 mSDsluCounter, 1228 mSDsCounter, 0 mSdLazyCounter, 1429 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 2646 SdHoareTripleChecker+Invalid, 1431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-04-02 05:57:11,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 2646 Invalid, 1431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1429 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-04-02 05:57:11,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1911 states. [2023-04-02 05:57:11,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1911 to 1909. [2023-04-02 05:57:11,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1909 states, 1905 states have (on average 1.674015748031496) internal successors, (3189), 1905 states have internal predecessors, (3189), 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 05:57:11,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1909 states to 1909 states and 3192 transitions. [2023-04-02 05:57:11,865 INFO L78 Accepts]: Start accepts. Automaton has 1909 states and 3192 transitions. Word has length 216 [2023-04-02 05:57:11,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 05:57:11,866 INFO L495 AbstractCegarLoop]: Abstraction has 1909 states and 3192 transitions. [2023-04-02 05:57:11,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.25) internal successors, (213), 3 states have internal predecessors, (213), 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 05:57:11,866 INFO L276 IsEmpty]: Start isEmpty. Operand 1909 states and 3192 transitions. [2023-04-02 05:57:11,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2023-04-02 05:57:11,869 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 05:57:11,869 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:57:11,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 05:57:11,869 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 05:57:11,870 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 05:57:11,870 INFO L85 PathProgramCache]: Analyzing trace with hash -2126617202, now seen corresponding path program 1 times [2023-04-02 05:57:11,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 05:57:11,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080500219] [2023-04-02 05:57:11,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 05:57:11,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 05:57:11,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:57:12,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 05:57:12,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:57:12,595 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 05:57:12,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 05:57:12,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080500219] [2023-04-02 05:57:12,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080500219] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 05:57:12,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 05:57:12,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 05:57:12,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344202195] [2023-04-02 05:57:12,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 05:57:12,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 05:57:12,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 05:57:12,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 05:57:12,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 05:57:12,597 INFO L87 Difference]: Start difference. First operand 1909 states and 3192 transitions. Second operand has 4 states, 4 states have (on average 54.25) internal successors, (217), 3 states have internal predecessors, (217), 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 05:57:15,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 05:57:15,996 INFO L93 Difference]: Finished difference Result 3292 states and 5462 transitions. [2023-04-02 05:57:15,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 05:57:15,997 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 54.25) internal successors, (217), 3 states have internal predecessors, (217), 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 220 [2023-04-02 05:57:15,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 05:57:16,004 INFO L225 Difference]: With dead ends: 3292 [2023-04-02 05:57:16,004 INFO L226 Difference]: Without dead ends: 2588 [2023-04-02 05:57:16,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 05:57:16,008 INFO L413 NwaCegarLoop]: 1419 mSDtfsCounter, 279 mSDsluCounter, 1235 mSDsCounter, 0 mSdLazyCounter, 1425 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 2654 SdHoareTripleChecker+Invalid, 1429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-04-02 05:57:16,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 2654 Invalid, 1429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1425 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-04-02 05:57:16,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2588 states. [2023-04-02 05:57:16,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2588 to 2586. [2023-04-02 05:57:16,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2586 states, 2582 states have (on average 1.6626646010844306) internal successors, (4293), 2582 states have internal predecessors, (4293), 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 05:57:16,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2586 states to 2586 states and 4296 transitions. [2023-04-02 05:57:16,082 INFO L78 Accepts]: Start accepts. Automaton has 2586 states and 4296 transitions. Word has length 220 [2023-04-02 05:57:16,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 05:57:16,083 INFO L495 AbstractCegarLoop]: Abstraction has 2586 states and 4296 transitions. [2023-04-02 05:57:16,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.25) internal successors, (217), 3 states have internal predecessors, (217), 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 05:57:16,083 INFO L276 IsEmpty]: Start isEmpty. Operand 2586 states and 4296 transitions. [2023-04-02 05:57:16,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2023-04-02 05:57:16,086 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 05:57:16,086 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:57:16,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 05:57:16,086 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 05:57:16,086 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 05:57:16,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1058759151, now seen corresponding path program 1 times [2023-04-02 05:57:16,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 05:57:16,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092674712] [2023-04-02 05:57:16,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 05:57:16,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 05:57:16,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:57:16,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 05:57:16,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:57:16,749 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 05:57:16,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 05:57:16,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092674712] [2023-04-02 05:57:16,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092674712] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 05:57:16,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 05:57:16,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 05:57:16,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492271598] [2023-04-02 05:57:16,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 05:57:16,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 05:57:16,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 05:57:16,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 05:57:16,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 05:57:16,759 INFO L87 Difference]: Start difference. First operand 2586 states and 4296 transitions. Second operand has 4 states, 4 states have (on average 54.25) internal successors, (217), 3 states have internal predecessors, (217), 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 05:57:19,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 05:57:19,968 INFO L93 Difference]: Finished difference Result 6318 states and 10350 transitions. [2023-04-02 05:57:19,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 05:57:19,970 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 54.25) internal successors, (217), 3 states have internal predecessors, (217), 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 220 [2023-04-02 05:57:19,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 05:57:19,981 INFO L225 Difference]: With dead ends: 6318 [2023-04-02 05:57:19,981 INFO L226 Difference]: Without dead ends: 4386 [2023-04-02 05:57:19,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 05:57:19,988 INFO L413 NwaCegarLoop]: 1383 mSDtfsCounter, 271 mSDsluCounter, 1229 mSDsCounter, 0 mSdLazyCounter, 1394 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 2612 SdHoareTripleChecker+Invalid, 1396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-04-02 05:57:19,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 2612 Invalid, 1396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1394 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-04-02 05:57:19,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4386 states. [2023-04-02 05:57:20,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4386 to 4384. [2023-04-02 05:57:20,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4384 states, 4380 states have (on average 1.6394977168949771) internal successors, (7181), 4380 states have internal predecessors, (7181), 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 05:57:20,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4384 states to 4384 states and 7184 transitions. [2023-04-02 05:57:20,117 INFO L78 Accepts]: Start accepts. Automaton has 4384 states and 7184 transitions. Word has length 220 [2023-04-02 05:57:20,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 05:57:20,117 INFO L495 AbstractCegarLoop]: Abstraction has 4384 states and 7184 transitions. [2023-04-02 05:57:20,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.25) internal successors, (217), 3 states have internal predecessors, (217), 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 05:57:20,117 INFO L276 IsEmpty]: Start isEmpty. Operand 4384 states and 7184 transitions. [2023-04-02 05:57:20,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2023-04-02 05:57:20,120 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 05:57:20,120 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:57:20,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-02 05:57:20,120 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 05:57:20,121 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 05:57:20,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1397821471, now seen corresponding path program 1 times [2023-04-02 05:57:20,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 05:57:20,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247033952] [2023-04-02 05:57:20,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 05:57:20,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 05:57:20,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:57:20,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 05:57:20,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:57:20,828 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 05:57:20,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 05:57:20,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247033952] [2023-04-02 05:57:20,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247033952] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 05:57:20,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 05:57:20,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 05:57:20,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194820200] [2023-04-02 05:57:20,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 05:57:20,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 05:57:20,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 05:57:20,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 05:57:20,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 05:57:20,831 INFO L87 Difference]: Start difference. First operand 4384 states and 7184 transitions. Second operand has 4 states, 4 states have (on average 55.25) internal successors, (221), 3 states have internal predecessors, (221), 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 05:57:24,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 05:57:24,095 INFO L93 Difference]: Finished difference Result 7944 states and 12962 transitions. [2023-04-02 05:57:24,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 05:57:24,096 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.25) internal successors, (221), 3 states have internal predecessors, (221), 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 224 [2023-04-02 05:57:24,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 05:57:24,111 INFO L225 Difference]: With dead ends: 7944 [2023-04-02 05:57:24,111 INFO L226 Difference]: Without dead ends: 6012 [2023-04-02 05:57:24,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 05:57:24,115 INFO L413 NwaCegarLoop]: 1383 mSDtfsCounter, 272 mSDsluCounter, 1236 mSDsCounter, 0 mSdLazyCounter, 1389 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 2619 SdHoareTripleChecker+Invalid, 1393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-04-02 05:57:24,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 2619 Invalid, 1393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1389 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-04-02 05:57:24,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6012 states. [2023-04-02 05:57:24,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6012 to 6010. [2023-04-02 05:57:24,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6010 states, 6006 states have (on average 1.62987012987013) internal successors, (9789), 6006 states have internal predecessors, (9789), 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 05:57:24,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6010 states to 6010 states and 9792 transitions. [2023-04-02 05:57:24,300 INFO L78 Accepts]: Start accepts. Automaton has 6010 states and 9792 transitions. Word has length 224 [2023-04-02 05:57:24,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 05:57:24,300 INFO L495 AbstractCegarLoop]: Abstraction has 6010 states and 9792 transitions. [2023-04-02 05:57:24,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.25) internal successors, (221), 3 states have internal predecessors, (221), 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 05:57:24,301 INFO L276 IsEmpty]: Start isEmpty. Operand 6010 states and 9792 transitions. [2023-04-02 05:57:24,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2023-04-02 05:57:24,303 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 05:57:24,304 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:57:24,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-02 05:57:24,304 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 05:57:24,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 05:57:24,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1648411732, now seen corresponding path program 1 times [2023-04-02 05:57:24,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 05:57:24,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025466853] [2023-04-02 05:57:24,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 05:57:24,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 05:57:24,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:57:24,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 05:57:25,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:57:25,014 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 05:57:25,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 05:57:25,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025466853] [2023-04-02 05:57:25,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025466853] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 05:57:25,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 05:57:25,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 05:57:25,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102345257] [2023-04-02 05:57:25,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 05:57:25,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 05:57:25,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 05:57:25,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 05:57:25,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 05:57:25,029 INFO L87 Difference]: Start difference. First operand 6010 states and 9792 transitions. Second operand has 4 states, 4 states have (on average 55.25) internal successors, (221), 3 states have internal predecessors, (221), 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 05:57:28,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 05:57:28,195 INFO L93 Difference]: Finished difference Result 16142 states and 26054 transitions. [2023-04-02 05:57:28,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 05:57:28,195 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.25) internal successors, (221), 3 states have internal predecessors, (221), 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 224 [2023-04-02 05:57:28,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 05:57:28,227 INFO L225 Difference]: With dead ends: 16142 [2023-04-02 05:57:28,227 INFO L226 Difference]: Without dead ends: 10878 [2023-04-02 05:57:28,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 05:57:28,239 INFO L413 NwaCegarLoop]: 1279 mSDtfsCounter, 264 mSDsluCounter, 1230 mSDsCounter, 0 mSdLazyCounter, 1290 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 2509 SdHoareTripleChecker+Invalid, 1292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-04-02 05:57:28,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 2509 Invalid, 1292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1290 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-04-02 05:57:28,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10878 states. [2023-04-02 05:57:28,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10878 to 10876. [2023-04-02 05:57:28,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10876 states, 10872 states have (on average 1.6100993377483444) internal successors, (17505), 10872 states have internal predecessors, (17505), 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 05:57:28,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10876 states to 10876 states and 17508 transitions. [2023-04-02 05:57:28,661 INFO L78 Accepts]: Start accepts. Automaton has 10876 states and 17508 transitions. Word has length 224 [2023-04-02 05:57:28,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 05:57:28,662 INFO L495 AbstractCegarLoop]: Abstraction has 10876 states and 17508 transitions. [2023-04-02 05:57:28,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.25) internal successors, (221), 3 states have internal predecessors, (221), 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 05:57:28,663 INFO L276 IsEmpty]: Start isEmpty. Operand 10876 states and 17508 transitions. [2023-04-02 05:57:28,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2023-04-02 05:57:28,665 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 05:57:28,665 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:57:28,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-02 05:57:28,665 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 05:57:28,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 05:57:28,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1091153167, now seen corresponding path program 1 times [2023-04-02 05:57:28,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 05:57:28,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119227752] [2023-04-02 05:57:28,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 05:57:28,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 05:57:28,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:57:29,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 05:57:29,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:57:29,399 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 05:57:29,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 05:57:29,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119227752] [2023-04-02 05:57:29,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119227752] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 05:57:29,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 05:57:29,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-02 05:57:29,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786571078] [2023-04-02 05:57:29,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 05:57:29,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 05:57:29,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 05:57:29,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 05:57:29,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-02 05:57:29,402 INFO L87 Difference]: Start difference. First operand 10876 states and 17508 transitions. Second operand has 8 states, 8 states have (on average 28.125) internal successors, (225), 7 states have internal predecessors, (225), 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 05:57:35,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 05:57:35,390 INFO L93 Difference]: Finished difference Result 73823 states and 119142 transitions. [2023-04-02 05:57:35,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-02 05:57:35,391 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 28.125) internal successors, (225), 7 states have internal predecessors, (225), 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 228 [2023-04-02 05:57:35,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 05:57:35,543 INFO L225 Difference]: With dead ends: 73823 [2023-04-02 05:57:35,543 INFO L226 Difference]: Without dead ends: 63555 [2023-04-02 05:57:35,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2023-04-02 05:57:35,573 INFO L413 NwaCegarLoop]: 1322 mSDtfsCounter, 3903 mSDsluCounter, 10684 mSDsCounter, 0 mSdLazyCounter, 1527 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3903 SdHoareTripleChecker+Valid, 12006 SdHoareTripleChecker+Invalid, 1548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-04-02 05:57:35,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3903 Valid, 12006 Invalid, 1548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1527 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-04-02 05:57:35,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63555 states. [2023-04-02 05:57:37,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63555 to 20559. [2023-04-02 05:57:37,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20559 states, 20555 states have (on average 1.6135733398199952) internal successors, (33167), 20555 states have internal predecessors, (33167), 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 05:57:37,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20559 states to 20559 states and 33170 transitions. [2023-04-02 05:57:37,761 INFO L78 Accepts]: Start accepts. Automaton has 20559 states and 33170 transitions. Word has length 228 [2023-04-02 05:57:37,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 05:57:37,762 INFO L495 AbstractCegarLoop]: Abstraction has 20559 states and 33170 transitions. [2023-04-02 05:57:37,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 28.125) internal successors, (225), 7 states have internal predecessors, (225), 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 05:57:37,762 INFO L276 IsEmpty]: Start isEmpty. Operand 20559 states and 33170 transitions. [2023-04-02 05:57:37,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2023-04-02 05:57:37,765 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 05:57:37,765 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:57:37,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-02 05:57:37,766 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 05:57:37,766 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 05:57:37,766 INFO L85 PathProgramCache]: Analyzing trace with hash 463264180, now seen corresponding path program 1 times [2023-04-02 05:57:37,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 05:57:37,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703381395] [2023-04-02 05:57:37,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 05:57:37,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 05:57:37,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:57:38,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 05:57:38,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:57:38,339 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 05:57:38,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 05:57:38,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703381395] [2023-04-02 05:57:38,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703381395] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 05:57:38,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 05:57:38,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 05:57:38,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367121260] [2023-04-02 05:57:38,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 05:57:38,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 05:57:38,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 05:57:38,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 05:57:38,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 05:57:38,341 INFO L87 Difference]: Start difference. First operand 20559 states and 33170 transitions. Second operand has 5 states, 5 states have (on average 45.2) internal successors, (226), 4 states have internal predecessors, (226), 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 05:57:44,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 05:57:44,600 INFO L93 Difference]: Finished difference Result 61093 states and 98680 transitions. [2023-04-02 05:57:44,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 05:57:44,600 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 45.2) internal successors, (226), 4 states have internal predecessors, (226), 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 229 [2023-04-02 05:57:44,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 05:57:44,673 INFO L225 Difference]: With dead ends: 61093 [2023-04-02 05:57:44,673 INFO L226 Difference]: Without dead ends: 41388 [2023-04-02 05:57:44,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-02 05:57:44,703 INFO L413 NwaCegarLoop]: 1324 mSDtfsCounter, 911 mSDsluCounter, 2814 mSDsCounter, 0 mSdLazyCounter, 1365 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 911 SdHoareTripleChecker+Valid, 4138 SdHoareTripleChecker+Invalid, 1372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-04-02 05:57:44,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [911 Valid, 4138 Invalid, 1372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1365 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-04-02 05:57:44,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41388 states. [2023-04-02 05:57:47,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41388 to 30907. [2023-04-02 05:57:47,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30907 states, 30903 states have (on average 1.6117205449309129) internal successors, (49807), 30903 states have internal predecessors, (49807), 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 05:57:47,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30907 states to 30907 states and 49810 transitions. [2023-04-02 05:57:47,183 INFO L78 Accepts]: Start accepts. Automaton has 30907 states and 49810 transitions. Word has length 229 [2023-04-02 05:57:47,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 05:57:47,183 INFO L495 AbstractCegarLoop]: Abstraction has 30907 states and 49810 transitions. [2023-04-02 05:57:47,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.2) internal successors, (226), 4 states have internal predecessors, (226), 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 05:57:47,183 INFO L276 IsEmpty]: Start isEmpty. Operand 30907 states and 49810 transitions. [2023-04-02 05:57:47,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2023-04-02 05:57:47,187 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 05:57:47,187 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:57:47,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-02 05:57:47,187 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 05:57:47,187 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 05:57:47,187 INFO L85 PathProgramCache]: Analyzing trace with hash -706610498, now seen corresponding path program 1 times [2023-04-02 05:57:47,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 05:57:47,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667431564] [2023-04-02 05:57:47,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 05:57:47,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 05:57:47,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:57:47,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 05:57:47,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:57:47,797 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 05:57:47,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 05:57:47,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667431564] [2023-04-02 05:57:47,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667431564] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 05:57:47,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 05:57:47,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 05:57:47,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321549601] [2023-04-02 05:57:47,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 05:57:47,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 05:57:47,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 05:57:47,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 05:57:47,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 05:57:47,799 INFO L87 Difference]: Start difference. First operand 30907 states and 49810 transitions. Second operand has 4 states, 4 states have (on average 56.5) internal successors, (226), 3 states have internal predecessors, (226), 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 05:57:53,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 05:57:53,956 INFO L93 Difference]: Finished difference Result 58969 states and 95100 transitions. [2023-04-02 05:57:53,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 05:57:53,957 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.5) internal successors, (226), 3 states have internal predecessors, (226), 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 229 [2023-04-02 05:57:53,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 05:57:54,056 INFO L225 Difference]: With dead ends: 58969 [2023-04-02 05:57:54,056 INFO L226 Difference]: Without dead ends: 43271 [2023-04-02 05:57:54,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 05:57:54,089 INFO L413 NwaCegarLoop]: 1349 mSDtfsCounter, 265 mSDsluCounter, 1237 mSDsCounter, 0 mSdLazyCounter, 1355 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 2586 SdHoareTripleChecker+Invalid, 1359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-04-02 05:57:54,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 2586 Invalid, 1359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1355 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-04-02 05:57:54,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43271 states. [2023-04-02 05:57:57,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43271 to 43269. [2023-04-02 05:57:57,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43269 states, 43265 states have (on average 1.606125043337571) internal successors, (69489), 43265 states have internal predecessors, (69489), 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 05:57:57,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43269 states to 43269 states and 69492 transitions. [2023-04-02 05:57:57,833 INFO L78 Accepts]: Start accepts. Automaton has 43269 states and 69492 transitions. Word has length 229 [2023-04-02 05:57:57,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 05:57:57,835 INFO L495 AbstractCegarLoop]: Abstraction has 43269 states and 69492 transitions. [2023-04-02 05:57:57,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.5) internal successors, (226), 3 states have internal predecessors, (226), 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 05:57:57,835 INFO L276 IsEmpty]: Start isEmpty. Operand 43269 states and 69492 transitions. [2023-04-02 05:57:57,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2023-04-02 05:57:57,849 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 05:57:57,850 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:57:57,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-02 05:57:57,862 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 05:57:57,863 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 05:57:57,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1753799324, now seen corresponding path program 1 times [2023-04-02 05:57:57,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 05:57:57,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881708504] [2023-04-02 05:57:57,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 05:57:57,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 05:57:57,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:57:58,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 05:57:58,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:57:58,563 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 05:57:58,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 05:57:58,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881708504] [2023-04-02 05:57:58,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881708504] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 05:57:58,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 05:57:58,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 05:57:58,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354443890] [2023-04-02 05:57:58,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 05:57:58,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 05:57:58,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 05:57:58,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 05:57:58,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 05:57:58,564 INFO L87 Difference]: Start difference. First operand 43269 states and 69492 transitions. Second operand has 4 states, 4 states have (on average 56.5) internal successors, (226), 3 states have internal predecessors, (226), 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 05:58:06,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 05:58:06,529 INFO L93 Difference]: Finished difference Result 82045 states and 131918 transitions. [2023-04-02 05:58:06,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 05:58:06,530 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.5) internal successors, (226), 3 states have internal predecessors, (226), 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 229 [2023-04-02 05:58:06,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 05:58:06,637 INFO L225 Difference]: With dead ends: 82045 [2023-04-02 05:58:06,637 INFO L226 Difference]: Without dead ends: 59656 [2023-04-02 05:58:06,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 05:58:06,668 INFO L413 NwaCegarLoop]: 1476 mSDtfsCounter, 286 mSDsluCounter, 1234 mSDsCounter, 0 mSdLazyCounter, 1482 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 2710 SdHoareTripleChecker+Invalid, 1486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-04-02 05:58:06,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 2710 Invalid, 1486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1482 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-04-02 05:58:06,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59656 states. [2023-04-02 05:58:11,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59656 to 59654. [2023-04-02 05:58:11,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59654 states, 59650 states have (on average 1.6007879295892709) internal successors, (95487), 59650 states have internal predecessors, (95487), 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 05:58:12,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59654 states to 59654 states and 95490 transitions. [2023-04-02 05:58:12,019 INFO L78 Accepts]: Start accepts. Automaton has 59654 states and 95490 transitions. Word has length 229 [2023-04-02 05:58:12,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 05:58:12,019 INFO L495 AbstractCegarLoop]: Abstraction has 59654 states and 95490 transitions. [2023-04-02 05:58:12,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.5) internal successors, (226), 3 states have internal predecessors, (226), 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 05:58:12,019 INFO L276 IsEmpty]: Start isEmpty. Operand 59654 states and 95490 transitions. [2023-04-02 05:58:12,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2023-04-02 05:58:12,028 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 05:58:12,028 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:58:12,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-02 05:58:12,028 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 05:58:12,029 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 05:58:12,029 INFO L85 PathProgramCache]: Analyzing trace with hash 433654590, now seen corresponding path program 1 times [2023-04-02 05:58:12,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 05:58:12,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934083483] [2023-04-02 05:58:12,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 05:58:12,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 05:58:12,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:58:12,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 05:58:12,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:58:12,613 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 05:58:12,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 05:58:12,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934083483] [2023-04-02 05:58:12,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934083483] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 05:58:12,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 05:58:12,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 05:58:12,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763734210] [2023-04-02 05:58:12,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 05:58:12,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 05:58:12,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 05:58:12,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 05:58:12,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 05:58:12,615 INFO L87 Difference]: Start difference. First operand 59654 states and 95490 transitions. Second operand has 4 states, 4 states have (on average 56.5) internal successors, (226), 3 states have internal predecessors, (226), 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 05:58:23,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 05:58:23,933 INFO L93 Difference]: Finished difference Result 131066 states and 209584 transitions. [2023-04-02 05:58:23,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 05:58:23,934 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.5) internal successors, (226), 3 states have internal predecessors, (226), 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 229 [2023-04-02 05:58:23,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 05:58:24,105 INFO L225 Difference]: With dead ends: 131066 [2023-04-02 05:58:24,106 INFO L226 Difference]: Without dead ends: 89888 [2023-04-02 05:58:24,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 05:58:24,153 INFO L413 NwaCegarLoop]: 1528 mSDtfsCounter, 293 mSDsluCounter, 1233 mSDsCounter, 0 mSdLazyCounter, 1534 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 2761 SdHoareTripleChecker+Invalid, 1538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-04-02 05:58:24,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 2761 Invalid, 1538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1534 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-04-02 05:58:24,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89888 states. [2023-04-02 05:58:32,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89888 to 89886. [2023-04-02 05:58:32,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89886 states, 89882 states have (on average 1.5908079481987494) internal successors, (142985), 89882 states have internal predecessors, (142985), 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 05:58:32,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89886 states to 89886 states and 142988 transitions. [2023-04-02 05:58:32,625 INFO L78 Accepts]: Start accepts. Automaton has 89886 states and 142988 transitions. Word has length 229 [2023-04-02 05:58:32,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 05:58:32,626 INFO L495 AbstractCegarLoop]: Abstraction has 89886 states and 142988 transitions. [2023-04-02 05:58:32,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.5) internal successors, (226), 3 states have internal predecessors, (226), 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 05:58:32,626 INFO L276 IsEmpty]: Start isEmpty. Operand 89886 states and 142988 transitions. [2023-04-02 05:58:32,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2023-04-02 05:58:32,627 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 05:58:32,627 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:58:32,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-02 05:58:32,628 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 05:58:32,641 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 05:58:32,641 INFO L85 PathProgramCache]: Analyzing trace with hash 3479823, now seen corresponding path program 1 times [2023-04-02 05:58:32,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 05:58:32,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291402424] [2023-04-02 05:58:32,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 05:58:32,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 05:58:33,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:58:33,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 05:58:33,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:58:33,969 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 05:58:33,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 05:58:33,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291402424] [2023-04-02 05:58:33,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291402424] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 05:58:33,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 05:58:33,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 05:58:33,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100684746] [2023-04-02 05:58:33,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 05:58:33,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 05:58:33,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 05:58:33,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 05:58:33,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 05:58:33,971 INFO L87 Difference]: Start difference. First operand 89886 states and 142988 transitions. Second operand has 6 states, 6 states have (on average 39.333333333333336) internal successors, (236), 5 states have internal predecessors, (236), 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 05:58:50,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 05:58:50,328 INFO L93 Difference]: Finished difference Result 149100 states and 236049 transitions. [2023-04-02 05:58:50,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 05:58:50,329 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 39.333333333333336) internal successors, (236), 5 states have internal predecessors, (236), 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 239 [2023-04-02 05:58:50,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 05:58:50,643 INFO L225 Difference]: With dead ends: 149100 [2023-04-02 05:58:50,643 INFO L226 Difference]: Without dead ends: 149098 [2023-04-02 05:58:50,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-02 05:58:50,692 INFO L413 NwaCegarLoop]: 1471 mSDtfsCounter, 604 mSDsluCounter, 4029 mSDsCounter, 0 mSdLazyCounter, 1501 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 5500 SdHoareTripleChecker+Invalid, 1502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-04-02 05:58:50,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [604 Valid, 5500 Invalid, 1502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1501 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-04-02 05:58:50,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149098 states. [2023-04-02 05:59:01,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149098 to 90854. [2023-04-02 05:59:01,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90854 states, 90850 states have (on average 1.5818381948266373) internal successors, (143710), 90850 states have internal predecessors, (143710), 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 05:59:01,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90854 states to 90854 states and 143713 transitions. [2023-04-02 05:59:01,273 INFO L78 Accepts]: Start accepts. Automaton has 90854 states and 143713 transitions. Word has length 239 [2023-04-02 05:59:01,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 05:59:01,274 INFO L495 AbstractCegarLoop]: Abstraction has 90854 states and 143713 transitions. [2023-04-02 05:59:01,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 39.333333333333336) internal successors, (236), 5 states have internal predecessors, (236), 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 05:59:01,274 INFO L276 IsEmpty]: Start isEmpty. Operand 90854 states and 143713 transitions. [2023-04-02 05:59:01,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2023-04-02 05:59:01,282 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 05:59:01,282 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:59:01,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-02 05:59:01,282 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 05:59:01,283 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 05:59:01,283 INFO L85 PathProgramCache]: Analyzing trace with hash -304124405, now seen corresponding path program 1 times [2023-04-02 05:59:01,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 05:59:01,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350494214] [2023-04-02 05:59:01,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 05:59:01,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 05:59:01,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:59:01,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 05:59:02,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:59:02,010 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-02 05:59:02,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 05:59:02,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350494214] [2023-04-02 05:59:02,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350494214] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 05:59:02,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 05:59:02,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-02 05:59:02,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191904882] [2023-04-02 05:59:02,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 05:59:02,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 05:59:02,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 05:59:02,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 05:59:02,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-04-02 05:59:02,011 INFO L87 Difference]: Start difference. First operand 90854 states and 143713 transitions. Second operand has 8 states, 8 states have (on average 32.75) internal successors, (262), 7 states have internal predecessors, (262), 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 05:59:43,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 05:59:43,927 INFO L93 Difference]: Finished difference Result 375109 states and 594423 transitions. [2023-04-02 05:59:43,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 05:59:43,928 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 32.75) internal successors, (262), 7 states have internal predecessors, (262), 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 280 [2023-04-02 05:59:43,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 05:59:44,897 INFO L225 Difference]: With dead ends: 375109 [2023-04-02 05:59:44,897 INFO L226 Difference]: Without dead ends: 315707 [2023-04-02 05:59:45,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-04-02 05:59:45,046 INFO L413 NwaCegarLoop]: 1588 mSDtfsCounter, 3031 mSDsluCounter, 5802 mSDsCounter, 0 mSdLazyCounter, 1701 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3031 SdHoareTripleChecker+Valid, 7390 SdHoareTripleChecker+Invalid, 1714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-04-02 05:59:45,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3031 Valid, 7390 Invalid, 1714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1701 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-04-02 05:59:45,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315707 states. [2023-04-02 06:00:07,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315707 to 158311. [2023-04-02 06:00:07,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158311 states, 158307 states have (on average 1.5790899960203908) internal successors, (249981), 158307 states have internal predecessors, (249981), 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 06:00:08,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158311 states to 158311 states and 249984 transitions. [2023-04-02 06:00:08,042 INFO L78 Accepts]: Start accepts. Automaton has 158311 states and 249984 transitions. Word has length 280 [2023-04-02 06:00:08,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:00:08,042 INFO L495 AbstractCegarLoop]: Abstraction has 158311 states and 249984 transitions. [2023-04-02 06:00:08,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 32.75) internal successors, (262), 7 states have internal predecessors, (262), 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 06:00:08,044 INFO L276 IsEmpty]: Start isEmpty. Operand 158311 states and 249984 transitions. [2023-04-02 06:00:08,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2023-04-02 06:00:08,074 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:00:08,074 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:00:08,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-02 06:00:08,074 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:00:08,075 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:00:08,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1409036216, now seen corresponding path program 1 times [2023-04-02 06:00:08,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:00:08,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296997113] [2023-04-02 06:00:08,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:00:08,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:00:08,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:00:08,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:00:08,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:00:08,847 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-02 06:00:08,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:00:08,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296997113] [2023-04-02 06:00:08,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296997113] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:00:08,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:00:08,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-02 06:00:08,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427925434] [2023-04-02 06:00:08,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:00:08,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 06:00:08,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:00:08,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 06:00:08,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-04-02 06:00:08,849 INFO L87 Difference]: Start difference. First operand 158311 states and 249984 transitions. Second operand has 8 states, 8 states have (on average 32.75) internal successors, (262), 7 states have internal predecessors, (262), 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)