/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_lcr.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 06:29:26,987 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 06:29:26,989 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 06:29:27,015 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 06:29:27,016 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 06:29:27,018 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 06:29:27,020 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 06:29:27,022 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 06:29:27,024 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 06:29:27,028 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 06:29:27,029 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 06:29:27,030 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 06:29:27,030 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 06:29:27,033 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 06:29:27,034 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 06:29:27,035 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 06:29:27,035 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 06:29:27,036 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 06:29:27,036 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 06:29:27,037 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 06:29:27,038 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 06:29:27,040 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 06:29:27,041 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 06:29:27,042 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 06:29:27,044 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 06:29:27,044 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 06:29:27,044 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 06:29:27,045 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 06:29:27,045 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 06:29:27,046 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 06:29:27,046 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 06:29:27,046 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 06:29:27,047 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 06:29:27,047 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 06:29:27,048 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 06:29:27,048 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 06:29:27,049 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 06:29:27,049 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 06:29:27,049 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 06:29:27,049 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 06:29:27,050 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 06:29:27,051 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-02 06:29:27,065 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 06:29:27,065 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 06:29:27,065 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 06:29:27,065 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 06:29:27,066 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 06:29:27,066 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 06:29:27,067 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 06:29:27,067 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 06:29:27,067 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 06:29:27,067 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 06:29:27,067 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 06:29:27,067 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 06:29:27,067 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 06:29:27,067 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 06:29:27,067 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 06:29:27,068 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 06:29:27,068 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 06:29:27,068 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 06:29:27,068 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 06:29:27,068 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 06:29:27,068 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 06:29:27,068 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 06:29:27,068 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 06:29:27,068 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 06:29:27,069 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 06:29:27,069 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 06:29:27,069 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 06:29:27,069 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 06:29:27,069 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 06:29:27,069 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 06:29:27,069 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 06:29:27,069 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 06:29:27,069 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 06:29:27,070 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 06:29:27,070 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 06:29:27,070 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 06:29:27,258 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 06:29:27,280 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 06:29:27,282 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 06:29:27,283 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 06:29:27,291 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 06:29:27,293 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2023-04-02 06:29:28,376 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 06:29:28,564 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 06:29:28,564 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2023-04-02 06:29:28,571 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b0f89b7b/5fc82bc75fd4431f8ac479ee5e4ace59/FLAGc8e1773b8 [2023-04-02 06:29:28,583 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b0f89b7b/5fc82bc75fd4431f8ac479ee5e4ace59 [2023-04-02 06:29:28,584 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 06:29:28,585 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 06:29:28,586 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 06:29:28,586 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 06:29:28,594 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 06:29:28,594 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 06:29:28" (1/1) ... [2023-04-02 06:29:28,595 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@295121c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:29:28, skipping insertion in model container [2023-04-02 06:29:28,595 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 06:29:28" (1/1) ... [2023-04-02 06:29:28,600 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 06:29:28,626 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 06:29:28,775 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_lcr.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[6778,6791] [2023-04-02 06:29:28,812 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 06:29:28,826 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 06:29:28,860 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_lcr.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[6778,6791] [2023-04-02 06:29:28,885 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 06:29:28,896 INFO L208 MainTranslator]: Completed translation [2023-04-02 06:29:28,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:29:28 WrapperNode [2023-04-02 06:29:28,896 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 06:29:28,897 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 06:29:28,897 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 06:29:28,897 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 06:29:28,906 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:29:28" (1/1) ... [2023-04-02 06:29:28,906 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:29:28" (1/1) ... [2023-04-02 06:29:28,916 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:29:28" (1/1) ... [2023-04-02 06:29:28,917 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:29:28" (1/1) ... [2023-04-02 06:29:28,925 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:29:28" (1/1) ... [2023-04-02 06:29:28,929 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:29:28" (1/1) ... [2023-04-02 06:29:28,931 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:29:28" (1/1) ... [2023-04-02 06:29:28,933 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:29:28" (1/1) ... [2023-04-02 06:29:28,935 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 06:29:28,936 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 06:29:28,936 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 06:29:28,936 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 06:29:28,936 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:29:28" (1/1) ... [2023-04-02 06:29:28,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 06:29:28,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 06:29:28,970 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-02 06:29:28,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-02 06:29:29,001 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 06:29:29,002 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 06:29:29,004 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 06:29:29,004 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 06:29:29,004 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 06:29:29,004 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 06:29:29,004 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 06:29:29,004 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 06:29:29,004 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 06:29:29,004 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-02 06:29:29,004 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-02 06:29:29,005 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-02 06:29:29,005 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 06:29:29,005 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-02 06:29:29,005 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-02 06:29:29,005 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-02 06:29:29,005 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-02 06:29:29,005 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-02 06:29:29,005 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-02 06:29:29,005 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-02 06:29:29,005 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-02 06:29:29,005 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 06:29:29,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 06:29:29,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 06:29:29,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 06:29:29,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 06:29:29,006 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 06:29:29,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 06:29:29,091 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 06:29:29,092 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 06:29:29,590 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 06:29:29,597 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 06:29:29,597 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-02 06:29:29,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 06:29:29 BoogieIcfgContainer [2023-04-02 06:29:29,600 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 06:29:29,601 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 06:29:29,602 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 06:29:29,604 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 06:29:29,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 06:29:28" (1/3) ... [2023-04-02 06:29:29,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18db5908 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 06:29:29, skipping insertion in model container [2023-04-02 06:29:29,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:29:28" (2/3) ... [2023-04-02 06:29:29,606 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18db5908 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 06:29:29, skipping insertion in model container [2023-04-02 06:29:29,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 06:29:29" (3/3) ... [2023-04-02 06:29:29,607 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2023-04-02 06:29:29,622 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 06:29:29,623 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 06:29:29,680 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 06:29:29,687 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;@4ca837e1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-02 06:29:29,688 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 06:29:29,692 INFO L276 IsEmpty]: Start isEmpty. Operand has 129 states, 122 states have (on average 1.7459016393442623) internal successors, (213), 124 states have internal predecessors, (213), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 06:29:29,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-04-02 06:29:29,702 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:29:29,703 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:29:29,704 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:29:29,709 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:29:29,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1538136048, now seen corresponding path program 1 times [2023-04-02 06:29:29,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:29:29,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750632399] [2023-04-02 06:29:29,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:29:29,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:29:29,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:29:30,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:29:30,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:29:30,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:29:30,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:29:30,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750632399] [2023-04-02 06:29:30,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750632399] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:29:30,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:29:30,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 06:29:30,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925082915] [2023-04-02 06:29:30,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:29:30,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 06:29:30,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:29:30,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 06:29:30,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 06:29:30,360 INFO L87 Difference]: Start difference. First operand has 129 states, 122 states have (on average 1.7459016393442623) internal successors, (213), 124 states have internal predecessors, (213), 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 7 states, 7 states have (on average 9.0) internal successors, (63), 6 states have internal predecessors, (63), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:29:31,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:29:31,289 INFO L93 Difference]: Finished difference Result 611 states and 955 transitions. [2023-04-02 06:29:31,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-02 06:29:31,291 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 6 states have internal predecessors, (63), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2023-04-02 06:29:31,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:29:31,305 INFO L225 Difference]: With dead ends: 611 [2023-04-02 06:29:31,306 INFO L226 Difference]: Without dead ends: 507 [2023-04-02 06:29:31,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2023-04-02 06:29:31,316 INFO L413 NwaCegarLoop]: 356 mSDtfsCounter, 1066 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1066 SdHoareTripleChecker+Valid, 1136 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-02 06:29:31,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1066 Valid, 1136 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-02 06:29:31,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2023-04-02 06:29:31,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 187. [2023-04-02 06:29:31,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 183 states have (on average 1.4371584699453552) internal successors, (263), 183 states have internal predecessors, (263), 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 06:29:31,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 266 transitions. [2023-04-02 06:29:31,370 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 266 transitions. Word has length 66 [2023-04-02 06:29:31,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:29:31,371 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 266 transitions. [2023-04-02 06:29:31,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 6 states have internal predecessors, (63), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:29:31,371 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 266 transitions. [2023-04-02 06:29:31,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-04-02 06:29:31,373 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:29:31,373 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:29:31,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 06:29:31,373 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:29:31,374 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:29:31,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1527323888, now seen corresponding path program 1 times [2023-04-02 06:29:31,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:29:31,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373761587] [2023-04-02 06:29:31,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:29:31,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:29:31,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:29:31,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:29:31,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:29:31,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:29:31,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:29:31,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373761587] [2023-04-02 06:29:31,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373761587] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:29:31,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:29:31,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 06:29:31,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197915803] [2023-04-02 06:29:31,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:29:31,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 06:29:31,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:29:31,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 06:29:31,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-02 06:29:31,621 INFO L87 Difference]: Start difference. First operand 187 states and 266 transitions. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 6 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:29:32,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:29:32,164 INFO L93 Difference]: Finished difference Result 647 states and 977 transitions. [2023-04-02 06:29:32,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 06:29:32,165 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 6 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2023-04-02 06:29:32,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:29:32,167 INFO L225 Difference]: With dead ends: 647 [2023-04-02 06:29:32,167 INFO L226 Difference]: Without dead ends: 549 [2023-04-02 06:29:32,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-04-02 06:29:32,169 INFO L413 NwaCegarLoop]: 309 mSDtfsCounter, 581 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 581 SdHoareTripleChecker+Valid, 749 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:29:32,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [581 Valid, 749 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:29:32,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2023-04-02 06:29:32,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 235. [2023-04-02 06:29:32,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 231 states have (on average 1.4632034632034632) internal successors, (338), 231 states have internal predecessors, (338), 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 06:29:32,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 341 transitions. [2023-04-02 06:29:32,190 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 341 transitions. Word has length 68 [2023-04-02 06:29:32,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:29:32,190 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 341 transitions. [2023-04-02 06:29:32,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 6 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:29:32,190 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 341 transitions. [2023-04-02 06:29:32,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-04-02 06:29:32,191 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:29:32,191 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:29:32,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 06:29:32,192 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:29:32,192 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:29:32,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1786924027, now seen corresponding path program 1 times [2023-04-02 06:29:32,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:29:32,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765119566] [2023-04-02 06:29:32,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:29:32,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:29:32,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:29:32,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:29:32,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:29:32,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:29:32,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:29:32,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765119566] [2023-04-02 06:29:32,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765119566] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:29:32,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:29:32,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 06:29:32,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229933381] [2023-04-02 06:29:32,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:29:32,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 06:29:32,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:29:32,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 06:29:32,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-02 06:29:32,367 INFO L87 Difference]: Start difference. First operand 235 states and 341 transitions. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 6 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:29:32,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:29:32,817 INFO L93 Difference]: Finished difference Result 696 states and 1053 transitions. [2023-04-02 06:29:32,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 06:29:32,817 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 6 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2023-04-02 06:29:32,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:29:32,821 INFO L225 Difference]: With dead ends: 696 [2023-04-02 06:29:32,821 INFO L226 Difference]: Without dead ends: 598 [2023-04-02 06:29:32,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-04-02 06:29:32,827 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 659 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 659 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:29:32,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [659 Valid, 746 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:29:32,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2023-04-02 06:29:32,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 338. [2023-04-02 06:29:32,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 334 states have (on average 1.4910179640718564) internal successors, (498), 334 states have internal predecessors, (498), 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 06:29:32,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 501 transitions. [2023-04-02 06:29:32,862 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 501 transitions. Word has length 68 [2023-04-02 06:29:32,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:29:32,863 INFO L495 AbstractCegarLoop]: Abstraction has 338 states and 501 transitions. [2023-04-02 06:29:32,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 6 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:29:32,863 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 501 transitions. [2023-04-02 06:29:32,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-04-02 06:29:32,868 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:29:32,868 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:29:32,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 06:29:32,869 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:29:32,869 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:29:32,869 INFO L85 PathProgramCache]: Analyzing trace with hash -384378713, now seen corresponding path program 1 times [2023-04-02 06:29:32,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:29:32,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080110125] [2023-04-02 06:29:32,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:29:32,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:29:32,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:29:33,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:29:33,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:29:33,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:29:33,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:29:33,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080110125] [2023-04-02 06:29:33,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080110125] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:29:33,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:29:33,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:29:33,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824856832] [2023-04-02 06:29:33,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:29:33,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:29:33,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:29:33,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:29:33,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:29:33,042 INFO L87 Difference]: Start difference. First operand 338 states and 501 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:29:33,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:29:33,222 INFO L93 Difference]: Finished difference Result 584 states and 882 transitions. [2023-04-02 06:29:33,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 06:29:33,223 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2023-04-02 06:29:33,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:29:33,225 INFO L225 Difference]: With dead ends: 584 [2023-04-02 06:29:33,225 INFO L226 Difference]: Without dead ends: 337 [2023-04-02 06:29:33,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:29:33,237 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 0 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 06:29:33,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 322 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 06:29:33,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2023-04-02 06:29:33,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 337. [2023-04-02 06:29:33,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 333 states have (on average 1.4774774774774775) internal successors, (492), 333 states have internal predecessors, (492), 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 06:29:33,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 495 transitions. [2023-04-02 06:29:33,257 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 495 transitions. Word has length 68 [2023-04-02 06:29:33,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:29:33,257 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 495 transitions. [2023-04-02 06:29:33,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:29:33,257 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 495 transitions. [2023-04-02 06:29:33,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-04-02 06:29:33,258 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:29:33,258 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:29:33,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 06:29:33,258 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:29:33,259 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:29:33,259 INFO L85 PathProgramCache]: Analyzing trace with hash -215612698, now seen corresponding path program 1 times [2023-04-02 06:29:33,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:29:33,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104862943] [2023-04-02 06:29:33,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:29:33,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:29:33,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:29:33,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:29:33,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:29:33,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:29:33,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:29:33,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104862943] [2023-04-02 06:29:33,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104862943] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:29:33,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:29:33,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 06:29:33,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780861018] [2023-04-02 06:29:33,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:29:33,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 06:29:33,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:29:33,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 06:29:33,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-02 06:29:33,496 INFO L87 Difference]: Start difference. First operand 337 states and 495 transitions. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 6 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:29:33,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:29:33,915 INFO L93 Difference]: Finished difference Result 674 states and 1013 transitions. [2023-04-02 06:29:33,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 06:29:33,915 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 6 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2023-04-02 06:29:33,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:29:33,917 INFO L225 Difference]: With dead ends: 674 [2023-04-02 06:29:33,917 INFO L226 Difference]: Without dead ends: 433 [2023-04-02 06:29:33,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-04-02 06:29:33,918 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 382 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:29:33,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 514 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:29:33,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2023-04-02 06:29:33,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 431. [2023-04-02 06:29:33,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 427 states have (on average 1.484777517564403) internal successors, (634), 427 states have internal predecessors, (634), 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 06:29:33,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 637 transitions. [2023-04-02 06:29:33,946 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 637 transitions. Word has length 68 [2023-04-02 06:29:33,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:29:33,947 INFO L495 AbstractCegarLoop]: Abstraction has 431 states and 637 transitions. [2023-04-02 06:29:33,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 6 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:29:33,948 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 637 transitions. [2023-04-02 06:29:33,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-04-02 06:29:33,948 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:29:33,948 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:29:33,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-02 06:29:33,948 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:29:33,949 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:29:33,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1467890075, now seen corresponding path program 1 times [2023-04-02 06:29:33,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:29:33,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931388639] [2023-04-02 06:29:33,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:29:33,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:29:33,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:29:34,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:29:34,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:29:34,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:29:34,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:29:34,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931388639] [2023-04-02 06:29:34,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931388639] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:29:34,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:29:34,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 06:29:34,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583030122] [2023-04-02 06:29:34,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:29:34,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 06:29:34,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:29:34,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 06:29:34,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-02 06:29:34,147 INFO L87 Difference]: Start difference. First operand 431 states and 637 transitions. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 6 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:29:34,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:29:34,671 INFO L93 Difference]: Finished difference Result 839 states and 1257 transitions. [2023-04-02 06:29:34,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 06:29:34,672 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 6 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2023-04-02 06:29:34,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:29:34,674 INFO L225 Difference]: With dead ends: 839 [2023-04-02 06:29:34,674 INFO L226 Difference]: Without dead ends: 742 [2023-04-02 06:29:34,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-04-02 06:29:34,675 INFO L413 NwaCegarLoop]: 316 mSDtfsCounter, 626 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 626 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:29:34,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [626 Valid, 959 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:29:34,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2023-04-02 06:29:34,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 537. [2023-04-02 06:29:34,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 533 states have (on average 1.4953095684803002) internal successors, (797), 533 states have internal predecessors, (797), 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 06:29:34,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 800 transitions. [2023-04-02 06:29:34,709 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 800 transitions. Word has length 68 [2023-04-02 06:29:34,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:29:34,709 INFO L495 AbstractCegarLoop]: Abstraction has 537 states and 800 transitions. [2023-04-02 06:29:34,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 6 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:29:34,709 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 800 transitions. [2023-04-02 06:29:34,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-04-02 06:29:34,710 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:29:34,710 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:29:34,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-02 06:29:34,710 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:29:34,710 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:29:34,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1884378150, now seen corresponding path program 1 times [2023-04-02 06:29:34,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:29:34,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893079301] [2023-04-02 06:29:34,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:29:34,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:29:34,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:29:34,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:29:34,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:29:34,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:29:34,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:29:34,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893079301] [2023-04-02 06:29:34,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893079301] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:29:34,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:29:34,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 06:29:34,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780849716] [2023-04-02 06:29:34,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:29:34,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 06:29:34,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:29:34,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 06:29:34,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-02 06:29:34,922 INFO L87 Difference]: Start difference. First operand 537 states and 800 transitions. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 6 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:29:35,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:29:35,475 INFO L93 Difference]: Finished difference Result 945 states and 1420 transitions. [2023-04-02 06:29:35,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 06:29:35,475 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 6 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2023-04-02 06:29:35,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:29:35,478 INFO L225 Difference]: With dead ends: 945 [2023-04-02 06:29:35,478 INFO L226 Difference]: Without dead ends: 848 [2023-04-02 06:29:35,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-04-02 06:29:35,479 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 631 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 631 SdHoareTripleChecker+Valid, 756 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:29:35,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [631 Valid, 756 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:29:35,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2023-04-02 06:29:35,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 643. [2023-04-02 06:29:35,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 639 states have (on average 1.5023474178403755) internal successors, (960), 639 states have internal predecessors, (960), 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 06:29:35,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 963 transitions. [2023-04-02 06:29:35,519 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 963 transitions. Word has length 68 [2023-04-02 06:29:35,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:29:35,520 INFO L495 AbstractCegarLoop]: Abstraction has 643 states and 963 transitions. [2023-04-02 06:29:35,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 6 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:29:35,520 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 963 transitions. [2023-04-02 06:29:35,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-04-02 06:29:35,520 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:29:35,520 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] [2023-04-02 06:29:35,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-02 06:29:35,521 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:29:35,521 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:29:35,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1904031631, now seen corresponding path program 1 times [2023-04-02 06:29:35,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:29:35,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622860777] [2023-04-02 06:29:35,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:29:35,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:29:35,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:29:35,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:29:35,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:29:35,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:29:35,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:29:35,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622860777] [2023-04-02 06:29:35,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622860777] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:29:35,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:29:35,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 06:29:35,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056681946] [2023-04-02 06:29:35,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:29:35,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:29:35,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:29:35,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:29:35,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:29:35,686 INFO L87 Difference]: Start difference. First operand 643 states and 963 transitions. Second operand has 6 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 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 06:29:36,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:29:36,043 INFO L93 Difference]: Finished difference Result 1248 states and 1886 transitions. [2023-04-02 06:29:36,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:29:36,044 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 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) Word has length 69 [2023-04-02 06:29:36,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:29:36,047 INFO L225 Difference]: With dead ends: 1248 [2023-04-02 06:29:36,047 INFO L226 Difference]: Without dead ends: 643 [2023-04-02 06:29:36,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-04-02 06:29:36,048 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 430 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 06:29:36,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [430 Valid, 99 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 06:29:36,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2023-04-02 06:29:36,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 643. [2023-04-02 06:29:36,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 639 states have (on average 1.483568075117371) internal successors, (948), 639 states have internal predecessors, (948), 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 06:29:36,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 951 transitions. [2023-04-02 06:29:36,093 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 951 transitions. Word has length 69 [2023-04-02 06:29:36,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:29:36,093 INFO L495 AbstractCegarLoop]: Abstraction has 643 states and 951 transitions. [2023-04-02 06:29:36,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 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 06:29:36,093 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 951 transitions. [2023-04-02 06:29:36,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-04-02 06:29:36,094 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:29:36,094 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:29:36,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-02 06:29:36,094 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:29:36,094 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:29:36,094 INFO L85 PathProgramCache]: Analyzing trace with hash -154432246, now seen corresponding path program 1 times [2023-04-02 06:29:36,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:29:36,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51811747] [2023-04-02 06:29:36,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:29:36,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:29:36,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:29:36,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:29:36,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:29:36,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:29:36,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:29:36,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51811747] [2023-04-02 06:29:36,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51811747] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:29:36,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:29:36,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 06:29:36,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851765268] [2023-04-02 06:29:36,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:29:36,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:29:36,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:29:36,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:29:36,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:29:36,269 INFO L87 Difference]: Start difference. First operand 643 states and 951 transitions. Second operand has 6 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 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 06:29:36,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:29:36,645 INFO L93 Difference]: Finished difference Result 1244 states and 1858 transitions. [2023-04-02 06:29:36,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:29:36,645 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 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) Word has length 70 [2023-04-02 06:29:36,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:29:36,647 INFO L225 Difference]: With dead ends: 1244 [2023-04-02 06:29:36,647 INFO L226 Difference]: Without dead ends: 643 [2023-04-02 06:29:36,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-04-02 06:29:36,649 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 412 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 06:29:36,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [412 Valid, 107 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 06:29:36,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2023-04-02 06:29:36,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 643. [2023-04-02 06:29:36,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 639 states have (on average 1.4647887323943662) internal successors, (936), 639 states have internal predecessors, (936), 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 06:29:36,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 939 transitions. [2023-04-02 06:29:36,696 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 939 transitions. Word has length 70 [2023-04-02 06:29:36,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:29:36,696 INFO L495 AbstractCegarLoop]: Abstraction has 643 states and 939 transitions. [2023-04-02 06:29:36,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 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 06:29:36,696 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 939 transitions. [2023-04-02 06:29:36,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-04-02 06:29:36,697 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:29:36,697 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] [2023-04-02 06:29:36,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-02 06:29:36,697 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:29:36,697 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:29:36,697 INFO L85 PathProgramCache]: Analyzing trace with hash -861275552, now seen corresponding path program 1 times [2023-04-02 06:29:36,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:29:36,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751443258] [2023-04-02 06:29:36,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:29:36,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:29:36,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:29:36,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:29:36,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:29:36,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:29:36,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:29:36,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751443258] [2023-04-02 06:29:36,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751443258] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:29:36,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:29:36,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 06:29:36,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318191165] [2023-04-02 06:29:36,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:29:36,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:29:36,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:29:36,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:29:36,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:29:36,855 INFO L87 Difference]: Start difference. First operand 643 states and 939 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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 06:29:37,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:29:37,219 INFO L93 Difference]: Finished difference Result 1240 states and 1830 transitions. [2023-04-02 06:29:37,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:29:37,220 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) Word has length 71 [2023-04-02 06:29:37,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:29:37,222 INFO L225 Difference]: With dead ends: 1240 [2023-04-02 06:29:37,222 INFO L226 Difference]: Without dead ends: 643 [2023-04-02 06:29:37,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-04-02 06:29:37,223 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 394 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 06:29:37,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [394 Valid, 115 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 06:29:37,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2023-04-02 06:29:37,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 643. [2023-04-02 06:29:37,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 639 states have (on average 1.4460093896713615) internal successors, (924), 639 states have internal predecessors, (924), 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 06:29:37,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 927 transitions. [2023-04-02 06:29:37,274 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 927 transitions. Word has length 71 [2023-04-02 06:29:37,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:29:37,274 INFO L495 AbstractCegarLoop]: Abstraction has 643 states and 927 transitions. [2023-04-02 06:29:37,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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 06:29:37,275 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 927 transitions. [2023-04-02 06:29:37,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-02 06:29:37,275 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:29:37,275 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:29:37,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-02 06:29:37,275 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:29:37,276 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:29:37,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1189343865, now seen corresponding path program 1 times [2023-04-02 06:29:37,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:29:37,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173721014] [2023-04-02 06:29:37,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:29:37,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:29:37,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:29:37,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:29:37,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:29:37,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:29:37,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:29:37,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173721014] [2023-04-02 06:29:37,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173721014] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:29:37,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:29:37,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 06:29:37,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144857374] [2023-04-02 06:29:37,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:29:37,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:29:37,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:29:37,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:29:37,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:29:37,430 INFO L87 Difference]: Start difference. First operand 643 states and 927 transitions. Second operand has 6 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 06:29:37,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:29:37,792 INFO L93 Difference]: Finished difference Result 1252 states and 1819 transitions. [2023-04-02 06:29:37,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:29:37,793 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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) Word has length 72 [2023-04-02 06:29:37,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:29:37,794 INFO L225 Difference]: With dead ends: 1252 [2023-04-02 06:29:37,795 INFO L226 Difference]: Without dead ends: 643 [2023-04-02 06:29:37,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-04-02 06:29:37,796 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 423 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 06:29:37,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [423 Valid, 91 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 06:29:37,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2023-04-02 06:29:37,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 643. [2023-04-02 06:29:37,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 639 states have (on average 1.4272300469483568) internal successors, (912), 639 states have internal predecessors, (912), 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 06:29:37,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 915 transitions. [2023-04-02 06:29:37,849 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 915 transitions. Word has length 72 [2023-04-02 06:29:37,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:29:37,849 INFO L495 AbstractCegarLoop]: Abstraction has 643 states and 915 transitions. [2023-04-02 06:29:37,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 06:29:37,849 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 915 transitions. [2023-04-02 06:29:37,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-02 06:29:37,849 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:29:37,850 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] [2023-04-02 06:29:37,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-02 06:29:37,850 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:29:37,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:29:37,850 INFO L85 PathProgramCache]: Analyzing trace with hash 389827565, now seen corresponding path program 1 times [2023-04-02 06:29:37,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:29:37,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680282273] [2023-04-02 06:29:37,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:29:37,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:29:37,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:29:38,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:29:38,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:29:38,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:29:38,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:29:38,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680282273] [2023-04-02 06:29:38,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680282273] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:29:38,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:29:38,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 06:29:38,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047772490] [2023-04-02 06:29:38,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:29:38,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:29:38,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:29:38,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:29:38,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:29:38,074 INFO L87 Difference]: Start difference. First operand 643 states and 915 transitions. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 5 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:29:38,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:29:38,398 INFO L93 Difference]: Finished difference Result 786 states and 1108 transitions. [2023-04-02 06:29:38,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:29:38,398 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 5 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2023-04-02 06:29:38,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:29:38,401 INFO L225 Difference]: With dead ends: 786 [2023-04-02 06:29:38,401 INFO L226 Difference]: Without dead ends: 784 [2023-04-02 06:29:38,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-02 06:29:38,401 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 132 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 06:29:38,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 618 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 06:29:38,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2023-04-02 06:29:38,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 643. [2023-04-02 06:29:38,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 639 states have (on average 1.4178403755868545) internal successors, (906), 639 states have internal predecessors, (906), 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 06:29:38,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 909 transitions. [2023-04-02 06:29:38,472 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 909 transitions. Word has length 73 [2023-04-02 06:29:38,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:29:38,472 INFO L495 AbstractCegarLoop]: Abstraction has 643 states and 909 transitions. [2023-04-02 06:29:38,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 5 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:29:38,472 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 909 transitions. [2023-04-02 06:29:38,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-02 06:29:38,473 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:29:38,473 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] [2023-04-02 06:29:38,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-02 06:29:38,473 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:29:38,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:29:38,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1011806311, now seen corresponding path program 1 times [2023-04-02 06:29:38,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:29:38,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791421427] [2023-04-02 06:29:38,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:29:38,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:29:38,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:29:38,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:29:38,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:29:38,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:29:38,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:29:38,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791421427] [2023-04-02 06:29:38,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791421427] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:29:38,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:29:38,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-02 06:29:38,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817410199] [2023-04-02 06:29:38,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:29:38,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-02 06:29:38,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:29:38,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-02 06:29:38,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-04-02 06:29:38,857 INFO L87 Difference]: Start difference. First operand 643 states and 909 transitions. Second operand has 10 states, 9 states have (on average 7.888888888888889) internal successors, (71), 8 states have internal predecessors, (71), 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 06:29:39,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:29:39,718 INFO L93 Difference]: Finished difference Result 1738 states and 2485 transitions. [2023-04-02 06:29:39,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 06:29:39,719 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 7.888888888888889) internal successors, (71), 8 states have internal predecessors, (71), 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) Word has length 74 [2023-04-02 06:29:39,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:29:39,725 INFO L225 Difference]: With dead ends: 1738 [2023-04-02 06:29:39,725 INFO L226 Difference]: Without dead ends: 1173 [2023-04-02 06:29:39,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2023-04-02 06:29:39,727 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 1137 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1137 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:29:39,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1137 Valid, 253 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:29:39,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2023-04-02 06:29:39,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 643. [2023-04-02 06:29:39,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 639 states have (on average 1.4162754303599374) internal successors, (905), 639 states have internal predecessors, (905), 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 06:29:39,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 908 transitions. [2023-04-02 06:29:39,851 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 908 transitions. Word has length 74 [2023-04-02 06:29:39,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:29:39,851 INFO L495 AbstractCegarLoop]: Abstraction has 643 states and 908 transitions. [2023-04-02 06:29:39,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 7.888888888888889) internal successors, (71), 8 states have internal predecessors, (71), 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 06:29:39,852 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 908 transitions. [2023-04-02 06:29:39,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-02 06:29:39,852 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:29:39,852 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] [2023-04-02 06:29:39,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-02 06:29:39,853 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:29:39,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:29:39,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1554524740, now seen corresponding path program 1 times [2023-04-02 06:29:39,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:29:39,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513296757] [2023-04-02 06:29:39,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:29:39,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:29:39,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:29:40,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:29:40,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:29:40,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:29:40,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:29:40,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513296757] [2023-04-02 06:29:40,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513296757] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:29:40,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:29:40,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-04-02 06:29:40,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531751839] [2023-04-02 06:29:40,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:29:40,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-02 06:29:40,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:29:40,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-02 06:29:40,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2023-04-02 06:29:40,175 INFO L87 Difference]: Start difference. First operand 643 states and 908 transitions. Second operand has 11 states, 10 states have (on average 7.1) internal successors, (71), 9 states have internal predecessors, (71), 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 06:29:41,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:29:41,179 INFO L93 Difference]: Finished difference Result 1790 states and 2554 transitions. [2023-04-02 06:29:41,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-02 06:29:41,179 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 7.1) internal successors, (71), 9 states have internal predecessors, (71), 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) Word has length 74 [2023-04-02 06:29:41,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:29:41,183 INFO L225 Difference]: With dead ends: 1790 [2023-04-02 06:29:41,183 INFO L226 Difference]: Without dead ends: 1230 [2023-04-02 06:29:41,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2023-04-02 06:29:41,185 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 1166 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1166 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:29:41,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1166 Valid, 328 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:29:41,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2023-04-02 06:29:41,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 643. [2023-04-02 06:29:41,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 639 states have (on average 1.4131455399061033) internal successors, (903), 639 states have internal predecessors, (903), 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 06:29:41,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 906 transitions. [2023-04-02 06:29:41,325 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 906 transitions. Word has length 74 [2023-04-02 06:29:41,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:29:41,325 INFO L495 AbstractCegarLoop]: Abstraction has 643 states and 906 transitions. [2023-04-02 06:29:41,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 7.1) internal successors, (71), 9 states have internal predecessors, (71), 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 06:29:41,325 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 906 transitions. [2023-04-02 06:29:41,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-02 06:29:41,325 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:29:41,325 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] [2023-04-02 06:29:41,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-02 06:29:41,326 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:29:41,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:29:41,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1613958553, now seen corresponding path program 1 times [2023-04-02 06:29:41,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:29:41,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711516991] [2023-04-02 06:29:41,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:29:41,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:29:41,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:29:41,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:29:41,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:29:41,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:29:41,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:29:41,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711516991] [2023-04-02 06:29:41,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711516991] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:29:41,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:29:41,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-04-02 06:29:41,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401761426] [2023-04-02 06:29:41,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:29:41,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-02 06:29:41,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:29:41,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-02 06:29:41,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2023-04-02 06:29:41,656 INFO L87 Difference]: Start difference. First operand 643 states and 906 transitions. Second operand has 11 states, 10 states have (on average 7.1) internal successors, (71), 9 states have internal predecessors, (71), 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 06:29:42,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:29:42,676 INFO L93 Difference]: Finished difference Result 1775 states and 2528 transitions. [2023-04-02 06:29:42,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-02 06:29:42,677 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 7.1) internal successors, (71), 9 states have internal predecessors, (71), 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) Word has length 74 [2023-04-02 06:29:42,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:29:42,681 INFO L225 Difference]: With dead ends: 1775 [2023-04-02 06:29:42,681 INFO L226 Difference]: Without dead ends: 1225 [2023-04-02 06:29:42,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2023-04-02 06:29:42,682 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 1144 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1144 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:29:42,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1144 Valid, 319 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:29:42,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2023-04-02 06:29:42,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 643. [2023-04-02 06:29:42,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 639 states have (on average 1.4068857589984352) internal successors, (899), 639 states have internal predecessors, (899), 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 06:29:42,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 902 transitions. [2023-04-02 06:29:42,834 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 902 transitions. Word has length 74 [2023-04-02 06:29:42,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:29:42,834 INFO L495 AbstractCegarLoop]: Abstraction has 643 states and 902 transitions. [2023-04-02 06:29:42,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 7.1) internal successors, (71), 9 states have internal predecessors, (71), 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 06:29:42,835 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 902 transitions. [2023-04-02 06:29:42,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-02 06:29:42,835 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:29:42,835 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] [2023-04-02 06:29:42,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-02 06:29:42,835 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:29:42,836 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:29:42,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1341318346, now seen corresponding path program 1 times [2023-04-02 06:29:42,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:29:42,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325322598] [2023-04-02 06:29:42,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:29:42,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:29:42,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:29:43,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:29:43,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:29:43,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:29:43,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:29:43,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325322598] [2023-04-02 06:29:43,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325322598] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:29:43,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:29:43,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-04-02 06:29:43,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041130439] [2023-04-02 06:29:43,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:29:43,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-02 06:29:43,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:29:43,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-02 06:29:43,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2023-04-02 06:29:43,196 INFO L87 Difference]: Start difference. First operand 643 states and 902 transitions. Second operand has 11 states, 10 states have (on average 7.2) internal successors, (72), 9 states have internal predecessors, (72), 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 06:29:44,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:29:44,170 INFO L93 Difference]: Finished difference Result 1745 states and 2476 transitions. [2023-04-02 06:29:44,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-02 06:29:44,171 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 7.2) internal successors, (72), 9 states have internal predecessors, (72), 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) Word has length 75 [2023-04-02 06:29:44,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:29:44,174 INFO L225 Difference]: With dead ends: 1745 [2023-04-02 06:29:44,174 INFO L226 Difference]: Without dead ends: 1215 [2023-04-02 06:29:44,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2023-04-02 06:29:44,175 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 1113 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1113 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:29:44,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1113 Valid, 316 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:29:44,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1215 states. [2023-04-02 06:29:44,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1215 to 643. [2023-04-02 06:29:44,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 639 states have (on average 1.3990610328638498) internal successors, (894), 639 states have internal predecessors, (894), 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 06:29:44,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 897 transitions. [2023-04-02 06:29:44,320 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 897 transitions. Word has length 75 [2023-04-02 06:29:44,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:29:44,320 INFO L495 AbstractCegarLoop]: Abstraction has 643 states and 897 transitions. [2023-04-02 06:29:44,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 7.2) internal successors, (72), 9 states have internal predecessors, (72), 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 06:29:44,320 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 897 transitions. [2023-04-02 06:29:44,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-04-02 06:29:44,321 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:29:44,321 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:29:44,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-04-02 06:29:44,321 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:29:44,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:29:44,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1124693533, now seen corresponding path program 1 times [2023-04-02 06:29:44,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:29:44,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184354719] [2023-04-02 06:29:44,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:29:44,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:29:44,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:29:45,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:29:45,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:29:45,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:29:45,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:29:45,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184354719] [2023-04-02 06:29:45,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184354719] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:29:45,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:29:45,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2023-04-02 06:29:45,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148455184] [2023-04-02 06:29:45,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:29:45,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-04-02 06:29:45,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:29:45,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-04-02 06:29:45,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=686, Unknown=0, NotChecked=0, Total=756 [2023-04-02 06:29:45,518 INFO L87 Difference]: Start difference. First operand 643 states and 897 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:29:50,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:29:50,722 INFO L93 Difference]: Finished difference Result 3887 states and 5543 transitions. [2023-04-02 06:29:50,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-04-02 06:29:50,723 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2023-04-02 06:29:50,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:29:50,732 INFO L225 Difference]: With dead ends: 3887 [2023-04-02 06:29:50,733 INFO L226 Difference]: Without dead ends: 3693 [2023-04-02 06:29:50,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=522, Invalid=2784, Unknown=0, NotChecked=0, Total=3306 [2023-04-02 06:29:50,735 INFO L413 NwaCegarLoop]: 407 mSDtfsCounter, 1493 mSDsluCounter, 5525 mSDsCounter, 0 mSdLazyCounter, 4980 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1493 SdHoareTripleChecker+Valid, 5932 SdHoareTripleChecker+Invalid, 5019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 4980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:29:50,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1493 Valid, 5932 Invalid, 5019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 4980 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-04-02 06:29:50,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3693 states. [2023-04-02 06:29:50,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3693 to 668. [2023-04-02 06:29:50,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 664 states have (on average 1.3930722891566265) internal successors, (925), 664 states have internal predecessors, (925), 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 06:29:50,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 928 transitions. [2023-04-02 06:29:50,961 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 928 transitions. Word has length 76 [2023-04-02 06:29:50,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:29:50,961 INFO L495 AbstractCegarLoop]: Abstraction has 668 states and 928 transitions. [2023-04-02 06:29:50,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:29:50,962 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 928 transitions. [2023-04-02 06:29:50,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-04-02 06:29:50,962 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:29:50,962 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:29:50,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-04-02 06:29:50,962 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:29:50,963 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:29:50,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1801429372, now seen corresponding path program 1 times [2023-04-02 06:29:50,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:29:50,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768900539] [2023-04-02 06:29:50,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:29:50,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:29:50,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:29:51,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:29:51,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:29:51,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:29:51,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:29:51,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768900539] [2023-04-02 06:29:51,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768900539] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:29:51,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:29:51,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-04-02 06:29:51,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800047297] [2023-04-02 06:29:51,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:29:51,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-02 06:29:51,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:29:51,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-02 06:29:51,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2023-04-02 06:29:51,512 INFO L87 Difference]: Start difference. First operand 668 states and 928 transitions. Second operand has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 13 states have internal predecessors, (73), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:29:53,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:29:53,872 INFO L93 Difference]: Finished difference Result 2469 states and 3511 transitions. [2023-04-02 06:29:53,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-02 06:29:53,875 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 13 states have internal predecessors, (73), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2023-04-02 06:29:53,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:29:53,881 INFO L225 Difference]: With dead ends: 2469 [2023-04-02 06:29:53,881 INFO L226 Difference]: Without dead ends: 2275 [2023-04-02 06:29:53,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2023-04-02 06:29:53,882 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 960 mSDsluCounter, 1164 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 960 SdHoareTripleChecker+Valid, 1418 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-02 06:29:53,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [960 Valid, 1418 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-02 06:29:53,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2275 states. [2023-04-02 06:29:54,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2275 to 665. [2023-04-02 06:29:54,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 661 states have (on average 1.3872919818456884) internal successors, (917), 661 states have internal predecessors, (917), 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 06:29:54,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 920 transitions. [2023-04-02 06:29:54,155 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 920 transitions. Word has length 76 [2023-04-02 06:29:54,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:29:54,155 INFO L495 AbstractCegarLoop]: Abstraction has 665 states and 920 transitions. [2023-04-02 06:29:54,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 13 states have internal predecessors, (73), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:29:54,155 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 920 transitions. [2023-04-02 06:29:54,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-04-02 06:29:54,156 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:29:54,156 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:29:54,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-04-02 06:29:54,156 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:29:54,156 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:29:54,156 INFO L85 PathProgramCache]: Analyzing trace with hash -665505091, now seen corresponding path program 1 times [2023-04-02 06:29:54,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:29:54,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793729381] [2023-04-02 06:29:54,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:29:54,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:29:54,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:29:54,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:29:54,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:29:54,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:29:54,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:29:54,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793729381] [2023-04-02 06:29:54,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793729381] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:29:54,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:29:54,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-04-02 06:29:54,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422203209] [2023-04-02 06:29:54,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:29:54,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 06:29:54,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:29:54,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 06:29:54,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-04-02 06:29:54,623 INFO L87 Difference]: Start difference. First operand 665 states and 920 transitions. Second operand has 12 states, 12 states have (on average 6.083333333333333) internal successors, (73), 11 states have internal predecessors, (73), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:29:57,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:29:57,037 INFO L93 Difference]: Finished difference Result 2470 states and 3505 transitions. [2023-04-02 06:29:57,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-02 06:29:57,038 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.083333333333333) internal successors, (73), 11 states have internal predecessors, (73), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2023-04-02 06:29:57,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:29:57,043 INFO L225 Difference]: With dead ends: 2470 [2023-04-02 06:29:57,044 INFO L226 Difference]: Without dead ends: 2251 [2023-04-02 06:29:57,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=142, Invalid=364, Unknown=0, NotChecked=0, Total=506 [2023-04-02 06:29:57,046 INFO L413 NwaCegarLoop]: 271 mSDtfsCounter, 1125 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1125 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 06:29:57,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1125 Valid, 832 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 06:29:57,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2251 states. [2023-04-02 06:29:57,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2251 to 644. [2023-04-02 06:29:57,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 640 states have (on average 1.3875) internal successors, (888), 640 states have internal predecessors, (888), 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 06:29:57,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 891 transitions. [2023-04-02 06:29:57,355 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 891 transitions. Word has length 76 [2023-04-02 06:29:57,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:29:57,355 INFO L495 AbstractCegarLoop]: Abstraction has 644 states and 891 transitions. [2023-04-02 06:29:57,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.083333333333333) internal successors, (73), 11 states have internal predecessors, (73), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:29:57,355 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 891 transitions. [2023-04-02 06:29:57,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-04-02 06:29:57,356 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:29:57,356 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] [2023-04-02 06:29:57,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-04-02 06:29:57,356 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:29:57,357 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:29:57,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1208650675, now seen corresponding path program 1 times [2023-04-02 06:29:57,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:29:57,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692339915] [2023-04-02 06:29:57,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:29:57,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:29:57,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:29:57,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:29:57,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:29:57,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:29:57,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:29:57,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692339915] [2023-04-02 06:29:57,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692339915] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:29:57,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:29:57,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-04-02 06:29:57,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259601109] [2023-04-02 06:29:57,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:29:57,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-02 06:29:57,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:29:57,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-02 06:29:57,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2023-04-02 06:29:57,912 INFO L87 Difference]: Start difference. First operand 644 states and 891 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 13 states have internal predecessors, (74), 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 06:30:00,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:30:00,763 INFO L93 Difference]: Finished difference Result 2440 states and 3467 transitions. [2023-04-02 06:30:00,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-02 06:30:00,764 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 13 states have internal predecessors, (74), 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 77 [2023-04-02 06:30:00,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:30:00,769 INFO L225 Difference]: With dead ends: 2440 [2023-04-02 06:30:00,769 INFO L226 Difference]: Without dead ends: 2228 [2023-04-02 06:30:00,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2023-04-02 06:30:00,770 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 1142 mSDsluCounter, 974 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1142 SdHoareTripleChecker+Valid, 1184 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 06:30:00,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1142 Valid, 1184 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 06:30:00,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2228 states. [2023-04-02 06:30:01,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2228 to 609. [2023-04-02 06:30:01,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 605 states have (on average 1.3933884297520662) internal successors, (843), 605 states have internal predecessors, (843), 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 06:30:01,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 846 transitions. [2023-04-02 06:30:01,118 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 846 transitions. Word has length 77 [2023-04-02 06:30:01,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:30:01,118 INFO L495 AbstractCegarLoop]: Abstraction has 609 states and 846 transitions. [2023-04-02 06:30:01,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 13 states have internal predecessors, (74), 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 06:30:01,119 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 846 transitions. [2023-04-02 06:30:01,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-04-02 06:30:01,119 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:30:01,119 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] [2023-04-02 06:30:01,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-04-02 06:30:01,119 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:30:01,119 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:30:01,120 INFO L85 PathProgramCache]: Analyzing trace with hash -88056766, now seen corresponding path program 1 times [2023-04-02 06:30:01,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:30:01,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576906320] [2023-04-02 06:30:01,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:30:01,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:30:01,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:30:02,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:30:02,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:30:02,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:30:02,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:30:02,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576906320] [2023-04-02 06:30:02,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576906320] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:30:02,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:30:02,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2023-04-02 06:30:02,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198293004] [2023-04-02 06:30:02,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:30:02,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-02 06:30:02,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:30:02,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-02 06:30:02,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2023-04-02 06:30:02,074 INFO L87 Difference]: Start difference. First operand 609 states and 846 transitions. Second operand has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 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 06:30:07,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:30:07,937 INFO L93 Difference]: Finished difference Result 4364 states and 6225 transitions. [2023-04-02 06:30:07,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-04-02 06:30:07,937 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 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 77 [2023-04-02 06:30:07,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:30:07,946 INFO L225 Difference]: With dead ends: 4364 [2023-04-02 06:30:07,946 INFO L226 Difference]: Without dead ends: 3837 [2023-04-02 06:30:07,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=413, Invalid=2037, Unknown=0, NotChecked=0, Total=2450 [2023-04-02 06:30:07,948 INFO L413 NwaCegarLoop]: 414 mSDtfsCounter, 930 mSDsluCounter, 5673 mSDsCounter, 0 mSdLazyCounter, 4622 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 930 SdHoareTripleChecker+Valid, 6087 SdHoareTripleChecker+Invalid, 4653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 4622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-04-02 06:30:07,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [930 Valid, 6087 Invalid, 4653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 4622 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-04-02 06:30:07,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3837 states. [2023-04-02 06:30:08,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3837 to 630. [2023-04-02 06:30:08,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 626 states have (on average 1.3865814696485623) internal successors, (868), 626 states have internal predecessors, (868), 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 06:30:08,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 871 transitions. [2023-04-02 06:30:08,319 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 871 transitions. Word has length 77 [2023-04-02 06:30:08,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:30:08,319 INFO L495 AbstractCegarLoop]: Abstraction has 630 states and 871 transitions. [2023-04-02 06:30:08,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 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 06:30:08,319 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 871 transitions. [2023-04-02 06:30:08,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-02 06:30:08,320 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:30:08,320 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] [2023-04-02 06:30:08,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-04-02 06:30:08,320 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:30:08,320 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:30:08,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1311282901, now seen corresponding path program 1 times [2023-04-02 06:30:08,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:30:08,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456411460] [2023-04-02 06:30:08,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:30:08,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:30:08,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:30:09,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:30:09,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:30:09,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:30:09,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:30:09,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456411460] [2023-04-02 06:30:09,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456411460] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:30:09,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:30:09,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-04-02 06:30:09,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9249530] [2023-04-02 06:30:09,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:30:09,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-02 06:30:09,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:30:09,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-02 06:30:09,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2023-04-02 06:30:09,081 INFO L87 Difference]: Start difference. First operand 630 states and 871 transitions. Second operand has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 18 states have internal predecessors, (75), 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 06:30:14,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:30:14,293 INFO L93 Difference]: Finished difference Result 3202 states and 4559 transitions. [2023-04-02 06:30:14,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-04-02 06:30:14,294 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 18 states have internal predecessors, (75), 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 78 [2023-04-02 06:30:14,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:30:14,299 INFO L225 Difference]: With dead ends: 3202 [2023-04-02 06:30:14,299 INFO L226 Difference]: Without dead ends: 3003 [2023-04-02 06:30:14,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=372, Invalid=1520, Unknown=0, NotChecked=0, Total=1892 [2023-04-02 06:30:14,301 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 1341 mSDsluCounter, 2691 mSDsCounter, 0 mSdLazyCounter, 1665 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1341 SdHoareTripleChecker+Valid, 2954 SdHoareTripleChecker+Invalid, 1681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-02 06:30:14,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1341 Valid, 2954 Invalid, 1681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1665 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-02 06:30:14,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3003 states. [2023-04-02 06:30:14,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3003 to 629. [2023-04-02 06:30:14,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 625 states have (on average 1.384) internal successors, (865), 625 states have internal predecessors, (865), 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 06:30:14,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 868 transitions. [2023-04-02 06:30:14,719 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 868 transitions. Word has length 78 [2023-04-02 06:30:14,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:30:14,719 INFO L495 AbstractCegarLoop]: Abstraction has 629 states and 868 transitions. [2023-04-02 06:30:14,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 18 states have internal predecessors, (75), 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 06:30:14,719 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 868 transitions. [2023-04-02 06:30:14,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-02 06:30:14,719 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:30:14,719 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] [2023-04-02 06:30:14,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-04-02 06:30:14,720 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:30:14,720 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:30:14,720 INFO L85 PathProgramCache]: Analyzing trace with hash 86259572, now seen corresponding path program 1 times [2023-04-02 06:30:14,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:30:14,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917398555] [2023-04-02 06:30:14,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:30:14,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:30:14,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:30:15,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:30:15,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:30:15,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:30:15,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:30:15,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917398555] [2023-04-02 06:30:15,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917398555] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:30:15,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:30:15,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-04-02 06:30:15,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161028293] [2023-04-02 06:30:15,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:30:15,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-02 06:30:15,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:30:15,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-02 06:30:15,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2023-04-02 06:30:15,208 INFO L87 Difference]: Start difference. First operand 629 states and 868 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 13 states have internal predecessors, (75), 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 06:30:18,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:30:18,382 INFO L93 Difference]: Finished difference Result 2425 states and 3443 transitions. [2023-04-02 06:30:18,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-02 06:30:18,382 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 13 states have internal predecessors, (75), 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 78 [2023-04-02 06:30:18,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:30:18,385 INFO L225 Difference]: With dead ends: 2425 [2023-04-02 06:30:18,385 INFO L226 Difference]: Without dead ends: 2215 [2023-04-02 06:30:18,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=166, Invalid=536, Unknown=0, NotChecked=0, Total=702 [2023-04-02 06:30:18,386 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 1122 mSDsluCounter, 1259 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1122 SdHoareTripleChecker+Valid, 1539 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-02 06:30:18,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1122 Valid, 1539 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-02 06:30:18,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2215 states. [2023-04-02 06:30:18,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2215 to 610. [2023-04-02 06:30:18,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 606 states have (on average 1.391089108910891) internal successors, (843), 606 states have internal predecessors, (843), 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 06:30:18,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 846 transitions. [2023-04-02 06:30:18,807 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 846 transitions. Word has length 78 [2023-04-02 06:30:18,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:30:18,807 INFO L495 AbstractCegarLoop]: Abstraction has 610 states and 846 transitions. [2023-04-02 06:30:18,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 13 states have internal predecessors, (75), 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 06:30:18,808 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 846 transitions. [2023-04-02 06:30:18,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-04-02 06:30:18,808 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:30:18,808 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-02 06:30:18,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-04-02 06:30:18,809 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:30:18,809 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:30:18,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1869407753, now seen corresponding path program 1 times [2023-04-02 06:30:18,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:30:18,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130908120] [2023-04-02 06:30:18,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:30:18,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:30:18,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:30:18,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:30:18,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:30:18,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:30:18,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:30:18,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130908120] [2023-04-02 06:30:18,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130908120] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:30:18,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:30:18,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 06:30:18,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600887678] [2023-04-02 06:30:18,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:30:18,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 06:30:18,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:30:18,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 06:30:18,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-02 06:30:18,991 INFO L87 Difference]: Start difference. First operand 610 states and 846 transitions. Second operand has 8 states, 7 states have (on average 14.285714285714286) internal successors, (100), 6 states have internal predecessors, (100), 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 06:30:20,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:30:20,652 INFO L93 Difference]: Finished difference Result 2204 states and 3085 transitions. [2023-04-02 06:30:20,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-02 06:30:20,652 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.285714285714286) internal successors, (100), 6 states have internal predecessors, (100), 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) Word has length 103 [2023-04-02 06:30:20,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:30:20,655 INFO L225 Difference]: With dead ends: 2204 [2023-04-02 06:30:20,655 INFO L226 Difference]: Without dead ends: 1679 [2023-04-02 06:30:20,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2023-04-02 06:30:20,656 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 1022 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1022 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 06:30:20,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1022 Valid, 245 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 06:30:20,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1679 states. [2023-04-02 06:30:21,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1679 to 748. [2023-04-02 06:30:21,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 744 states have (on average 1.3629032258064515) internal successors, (1014), 744 states have internal predecessors, (1014), 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 06:30:21,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 1017 transitions. [2023-04-02 06:30:21,161 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 1017 transitions. Word has length 103 [2023-04-02 06:30:21,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:30:21,162 INFO L495 AbstractCegarLoop]: Abstraction has 748 states and 1017 transitions. [2023-04-02 06:30:21,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.285714285714286) internal successors, (100), 6 states have internal predecessors, (100), 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 06:30:21,162 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 1017 transitions. [2023-04-02 06:30:21,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-04-02 06:30:21,162 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:30:21,162 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:30:21,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-04-02 06:30:21,163 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:30:21,163 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:30:21,163 INFO L85 PathProgramCache]: Analyzing trace with hash 2113866222, now seen corresponding path program 1 times [2023-04-02 06:30:21,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:30:21,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278189599] [2023-04-02 06:30:21,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:30:21,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:30:21,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:30:21,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:30:21,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:30:21,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:30:21,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:30:21,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278189599] [2023-04-02 06:30:21,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278189599] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:30:21,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:30:21,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 06:30:21,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835075145] [2023-04-02 06:30:21,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:30:21,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 06:30:21,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:30:21,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 06:30:21,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-02 06:30:21,340 INFO L87 Difference]: Start difference. First operand 748 states and 1017 transitions. Second operand has 8 states, 7 states have (on average 14.285714285714286) internal successors, (100), 6 states have internal predecessors, (100), 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 06:30:23,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:30:23,798 INFO L93 Difference]: Finished difference Result 3190 states and 4401 transitions. [2023-04-02 06:30:23,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-02 06:30:23,799 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.285714285714286) internal successors, (100), 6 states have internal predecessors, (100), 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) Word has length 103 [2023-04-02 06:30:23,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:30:23,802 INFO L225 Difference]: With dead ends: 3190 [2023-04-02 06:30:23,802 INFO L226 Difference]: Without dead ends: 2527 [2023-04-02 06:30:23,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2023-04-02 06:30:23,803 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 1016 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1016 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:30:23,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1016 Valid, 290 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:30:23,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2527 states. [2023-04-02 06:30:24,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2527 to 1519. [2023-04-02 06:30:24,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1519 states, 1515 states have (on average 1.3815181518151816) internal successors, (2093), 1515 states have internal predecessors, (2093), 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 06:30:24,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 2096 transitions. [2023-04-02 06:30:24,854 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 2096 transitions. Word has length 103 [2023-04-02 06:30:24,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:30:24,855 INFO L495 AbstractCegarLoop]: Abstraction has 1519 states and 2096 transitions. [2023-04-02 06:30:24,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.285714285714286) internal successors, (100), 6 states have internal predecessors, (100), 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 06:30:24,855 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 2096 transitions. [2023-04-02 06:30:24,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-04-02 06:30:24,855 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:30:24,855 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:30:24,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-04-02 06:30:24,856 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:30:24,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:30:24,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1758532620, now seen corresponding path program 1 times [2023-04-02 06:30:24,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:30:24,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636025183] [2023-04-02 06:30:24,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:30:24,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:30:24,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:30:25,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:30:25,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:30:25,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:30:25,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:30:25,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636025183] [2023-04-02 06:30:25,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636025183] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:30:25,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:30:25,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 06:30:25,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277445674] [2023-04-02 06:30:25,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:30:25,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 06:30:25,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:30:25,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 06:30:25,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-02 06:30:25,046 INFO L87 Difference]: Start difference. First operand 1519 states and 2096 transitions. Second operand has 8 states, 7 states have (on average 14.285714285714286) internal successors, (100), 6 states have internal predecessors, (100), 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 06:30:29,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:30:29,303 INFO L93 Difference]: Finished difference Result 6461 states and 9014 transitions. [2023-04-02 06:30:29,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-02 06:30:29,303 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.285714285714286) internal successors, (100), 6 states have internal predecessors, (100), 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) Word has length 103 [2023-04-02 06:30:29,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:30:29,310 INFO L225 Difference]: With dead ends: 6461 [2023-04-02 06:30:29,310 INFO L226 Difference]: Without dead ends: 5027 [2023-04-02 06:30:29,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2023-04-02 06:30:29,313 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 1205 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1205 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:30:29,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1205 Valid, 286 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:30:29,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5027 states. [2023-04-02 06:30:31,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5027 to 3171. [2023-04-02 06:30:31,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3171 states, 3167 states have (on average 1.3909062203978528) internal successors, (4405), 3167 states have internal predecessors, (4405), 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 06:30:31,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3171 states to 3171 states and 4408 transitions. [2023-04-02 06:30:31,610 INFO L78 Accepts]: Start accepts. Automaton has 3171 states and 4408 transitions. Word has length 103 [2023-04-02 06:30:31,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:30:31,610 INFO L495 AbstractCegarLoop]: Abstraction has 3171 states and 4408 transitions. [2023-04-02 06:30:31,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.285714285714286) internal successors, (100), 6 states have internal predecessors, (100), 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 06:30:31,610 INFO L276 IsEmpty]: Start isEmpty. Operand 3171 states and 4408 transitions. [2023-04-02 06:30:31,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-04-02 06:30:31,611 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:30:31,611 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:30:31,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-04-02 06:30:31,612 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:30:31,612 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:30:31,612 INFO L85 PathProgramCache]: Analyzing trace with hash -296954246, now seen corresponding path program 1 times [2023-04-02 06:30:31,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:30:31,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253680872] [2023-04-02 06:30:31,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:30:31,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:30:31,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:30:31,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:30:31,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:30:31,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:30:31,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:30:31,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253680872] [2023-04-02 06:30:31,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253680872] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:30:31,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:30:31,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 06:30:31,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929738157] [2023-04-02 06:30:31,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:30:31,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 06:30:31,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:30:31,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 06:30:31,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-02 06:30:31,795 INFO L87 Difference]: Start difference. First operand 3171 states and 4408 transitions. Second operand has 8 states, 7 states have (on average 14.285714285714286) internal successors, (100), 6 states have internal predecessors, (100), 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 06:30:40,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:30:40,715 INFO L93 Difference]: Finished difference Result 14367 states and 20132 transitions. [2023-04-02 06:30:40,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-02 06:30:40,716 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.285714285714286) internal successors, (100), 6 states have internal predecessors, (100), 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) Word has length 103 [2023-04-02 06:30:40,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:30:40,733 INFO L225 Difference]: With dead ends: 14367 [2023-04-02 06:30:40,733 INFO L226 Difference]: Without dead ends: 11281 [2023-04-02 06:30:40,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2023-04-02 06:30:40,739 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 1352 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1352 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:30:40,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1352 Valid, 288 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:30:40,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11281 states. [2023-04-02 06:30:45,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11281 to 6695. [2023-04-02 06:30:45,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6695 states, 6691 states have (on average 1.3954565834703332) internal successors, (9337), 6691 states have internal predecessors, (9337), 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 06:30:45,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6695 states to 6695 states and 9340 transitions. [2023-04-02 06:30:45,653 INFO L78 Accepts]: Start accepts. Automaton has 6695 states and 9340 transitions. Word has length 103 [2023-04-02 06:30:45,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:30:45,653 INFO L495 AbstractCegarLoop]: Abstraction has 6695 states and 9340 transitions. [2023-04-02 06:30:45,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.285714285714286) internal successors, (100), 6 states have internal predecessors, (100), 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 06:30:45,653 INFO L276 IsEmpty]: Start isEmpty. Operand 6695 states and 9340 transitions. [2023-04-02 06:30:45,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-04-02 06:30:45,656 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:30:45,656 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:30:45,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-04-02 06:30:45,656 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:30:45,657 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:30:45,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1878564576, now seen corresponding path program 1 times [2023-04-02 06:30:45,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:30:45,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81624404] [2023-04-02 06:30:45,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:30:45,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:30:45,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:30:45,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:30:45,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:30:45,812 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-04-02 06:30:45,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:30:45,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81624404] [2023-04-02 06:30:45,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81624404] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:30:45,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:30:45,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:30:45,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117563275] [2023-04-02 06:30:45,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:30:45,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:30:45,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:30:45,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:30:45,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:30:45,814 INFO L87 Difference]: Start difference. First operand 6695 states and 9340 transitions. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 3 states have internal predecessors, (111), 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 06:30:50,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:30:50,699 INFO L93 Difference]: Finished difference Result 12779 states and 17798 transitions. [2023-04-02 06:30:50,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:30:50,700 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 3 states have internal predecessors, (111), 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 128 [2023-04-02 06:30:50,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:30:50,710 INFO L225 Difference]: With dead ends: 12779 [2023-04-02 06:30:50,710 INFO L226 Difference]: Without dead ends: 6169 [2023-04-02 06:30:50,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:30:50,718 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 57 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 06:30:50,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 299 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 06:30:50,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6169 states. [2023-04-02 06:30:54,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6169 to 4713. [2023-04-02 06:30:54,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4713 states, 4709 states have (on average 1.3703546400509663) internal successors, (6453), 4709 states have internal predecessors, (6453), 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 06:30:54,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4713 states to 4713 states and 6456 transitions. [2023-04-02 06:30:54,284 INFO L78 Accepts]: Start accepts. Automaton has 4713 states and 6456 transitions. Word has length 128 [2023-04-02 06:30:54,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:30:54,284 INFO L495 AbstractCegarLoop]: Abstraction has 4713 states and 6456 transitions. [2023-04-02 06:30:54,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 3 states have internal predecessors, (111), 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 06:30:54,284 INFO L276 IsEmpty]: Start isEmpty. Operand 4713 states and 6456 transitions. [2023-04-02 06:30:54,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-04-02 06:30:54,286 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:30:54,286 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:30:54,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-04-02 06:30:54,286 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:30:54,286 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:30:54,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1967886283, now seen corresponding path program 1 times [2023-04-02 06:30:54,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:30:54,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337084161] [2023-04-02 06:30:54,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:30:54,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:30:54,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:30:54,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:30:54,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:30:54,435 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-04-02 06:30:54,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:30:54,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337084161] [2023-04-02 06:30:54,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337084161] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:30:54,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:30:54,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:30:54,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820573925] [2023-04-02 06:30:54,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:30:54,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:30:54,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:30:54,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:30:54,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:30:54,436 INFO L87 Difference]: Start difference. First operand 4713 states and 6456 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 3 states have internal predecessors, (110), 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 06:30:59,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:30:59,116 INFO L93 Difference]: Finished difference Result 10291 states and 14100 transitions. [2023-04-02 06:30:59,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:30:59,116 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 3 states have internal predecessors, (110), 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 128 [2023-04-02 06:30:59,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:30:59,123 INFO L225 Difference]: With dead ends: 10291 [2023-04-02 06:30:59,123 INFO L226 Difference]: Without dead ends: 5663 [2023-04-02 06:30:59,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:30:59,128 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 63 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 06:30:59,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 298 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 06:30:59,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5663 states. [2023-04-02 06:31:03,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5663 to 5153. [2023-04-02 06:31:03,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5153 states, 5149 states have (on average 1.3728879394057099) internal successors, (7069), 5149 states have internal predecessors, (7069), 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 06:31:03,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5153 states to 5153 states and 7072 transitions. [2023-04-02 06:31:03,113 INFO L78 Accepts]: Start accepts. Automaton has 5153 states and 7072 transitions. Word has length 128 [2023-04-02 06:31:03,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:31:03,113 INFO L495 AbstractCegarLoop]: Abstraction has 5153 states and 7072 transitions. [2023-04-02 06:31:03,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 3 states have internal predecessors, (110), 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 06:31:03,113 INFO L276 IsEmpty]: Start isEmpty. Operand 5153 states and 7072 transitions. [2023-04-02 06:31:03,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-04-02 06:31:03,115 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:31:03,115 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2023-04-02 06:31:03,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-04-02 06:31:03,115 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:31:03,116 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:31:03,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1849708716, now seen corresponding path program 1 times [2023-04-02 06:31:03,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:31:03,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293484592] [2023-04-02 06:31:03,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:31:03,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:31:03,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:31:03,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:31:03,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:31:03,297 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-02 06:31:03,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:31:03,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293484592] [2023-04-02 06:31:03,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293484592] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:31:03,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:31:03,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:31:03,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75714967] [2023-04-02 06:31:03,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:31:03,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:31:03,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:31:03,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:31:03,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:31:03,298 INFO L87 Difference]: Start difference. First operand 5153 states and 7072 transitions. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 3 states have internal predecessors, (116), 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 06:31:07,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:31:07,393 INFO L93 Difference]: Finished difference Result 9761 states and 13350 transitions. [2023-04-02 06:31:07,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:31:07,398 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 3 states have internal predecessors, (116), 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 129 [2023-04-02 06:31:07,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:31:07,405 INFO L225 Difference]: With dead ends: 9761 [2023-04-02 06:31:07,405 INFO L226 Difference]: Without dead ends: 4693 [2023-04-02 06:31:07,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:31:07,411 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 50 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 06:31:07,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 306 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 06:31:07,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4693 states. [2023-04-02 06:31:11,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4693 to 4559. [2023-04-02 06:31:11,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4559 states, 4555 states have (on average 1.3490669593852909) internal successors, (6145), 4555 states have internal predecessors, (6145), 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 06:31:11,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4559 states to 4559 states and 6148 transitions. [2023-04-02 06:31:11,092 INFO L78 Accepts]: Start accepts. Automaton has 4559 states and 6148 transitions. Word has length 129 [2023-04-02 06:31:11,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:31:11,092 INFO L495 AbstractCegarLoop]: Abstraction has 4559 states and 6148 transitions. [2023-04-02 06:31:11,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 3 states have internal predecessors, (116), 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 06:31:11,092 INFO L276 IsEmpty]: Start isEmpty. Operand 4559 states and 6148 transitions. [2023-04-02 06:31:11,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-04-02 06:31:11,094 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:31:11,094 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2023-04-02 06:31:11,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-04-02 06:31:11,094 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:31:11,094 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:31:11,094 INFO L85 PathProgramCache]: Analyzing trace with hash -73992221, now seen corresponding path program 1 times [2023-04-02 06:31:11,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:31:11,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900813994] [2023-04-02 06:31:11,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:31:11,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:31:11,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:31:11,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:31:11,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:31:11,254 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-02 06:31:11,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:31:11,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900813994] [2023-04-02 06:31:11,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900813994] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:31:11,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:31:11,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:31:11,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758054935] [2023-04-02 06:31:11,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:31:11,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:31:11,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:31:11,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:31:11,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:31:11,255 INFO L87 Difference]: Start difference. First operand 4559 states and 6148 transitions. Second operand has 4 states, 4 states have (on average 30.25) internal successors, (121), 3 states have internal predecessors, (121), 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 06:31:17,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:31:17,932 INFO L93 Difference]: Finished difference Result 11919 states and 16014 transitions. [2023-04-02 06:31:17,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:31:17,932 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 3 states have internal predecessors, (121), 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 130 [2023-04-02 06:31:17,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:31:17,941 INFO L225 Difference]: With dead ends: 11919 [2023-04-02 06:31:17,941 INFO L226 Difference]: Without dead ends: 7445 [2023-04-02 06:31:17,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:31:17,945 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 41 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 06:31:17,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 305 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 06:31:17,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7445 states. [2023-04-02 06:31:23,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7445 to 6827. [2023-04-02 06:31:23,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6827 states, 6823 states have (on average 1.329766964678294) internal successors, (9073), 6823 states have internal predecessors, (9073), 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 06:31:23,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6827 states to 6827 states and 9076 transitions. [2023-04-02 06:31:23,791 INFO L78 Accepts]: Start accepts. Automaton has 6827 states and 9076 transitions. Word has length 130 [2023-04-02 06:31:23,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:31:23,791 INFO L495 AbstractCegarLoop]: Abstraction has 6827 states and 9076 transitions. [2023-04-02 06:31:23,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 3 states have internal predecessors, (121), 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 06:31:23,792 INFO L276 IsEmpty]: Start isEmpty. Operand 6827 states and 9076 transitions. [2023-04-02 06:31:23,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-04-02 06:31:23,794 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:31:23,794 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2023-04-02 06:31:23,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-04-02 06:31:23,794 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:31:23,794 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:31:23,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1487150382, now seen corresponding path program 1 times [2023-04-02 06:31:23,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:31:23,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721859292] [2023-04-02 06:31:23,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:31:23,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:31:23,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:31:24,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:31:24,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:31:24,416 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:31:24,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:31:24,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721859292] [2023-04-02 06:31:24,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721859292] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 06:31:24,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978642829] [2023-04-02 06:31:24,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:31:24,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 06:31:24,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 06:31:24,435 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 06:31:24,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 06:31:24,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:31:24,611 INFO L262 TraceCheckSpWp]: Trace formula consists of 847 conjuncts, 14 conjunts are in the unsatisfiable core [2023-04-02 06:31:24,622 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 06:31:25,393 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:31:25,393 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 06:31:26,256 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:31:26,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978642829] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 06:31:26,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 06:31:26,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 34 [2023-04-02 06:31:26,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529878246] [2023-04-02 06:31:26,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 06:31:26,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-04-02 06:31:26,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:31:26,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-04-02 06:31:26,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1005, Unknown=0, NotChecked=0, Total=1122 [2023-04-02 06:31:26,259 INFO L87 Difference]: Start difference. First operand 6827 states and 9076 transitions. Second operand has 34 states, 34 states have (on average 10.529411764705882) internal successors, (358), 32 states have internal predecessors, (358), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3)