/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-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 06:06:41,874 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 06:06:41,876 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 06:06:41,912 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 06:06:41,913 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 06:06:41,914 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 06:06:41,915 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 06:06:41,916 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 06:06:41,918 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 06:06:41,919 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 06:06:41,920 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 06:06:41,920 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 06:06:41,921 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 06:06:41,922 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 06:06:41,922 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 06:06:41,923 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 06:06:41,924 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 06:06:41,925 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 06:06:41,929 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 06:06:41,931 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 06:06:41,932 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 06:06:41,936 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 06:06:41,937 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 06:06:41,938 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 06:06:41,941 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 06:06:41,944 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 06:06:41,945 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 06:06:41,945 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 06:06:41,946 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 06:06:41,947 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 06:06:41,947 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 06:06:41,948 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 06:06:41,948 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 06:06:41,948 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 06:06:41,949 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 06:06:41,949 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 06:06:41,954 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 06:06:41,976 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 06:06:41,977 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 06:06:41,977 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 06:06:41,977 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 06:06:41,978 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 06:06:41,978 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 06:06:41,978 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 06:06:41,979 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 06:06:41,979 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 06:06:41,979 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 06:06:41,979 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 06:06:41,979 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 06:06:41,979 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 06:06:41,979 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 06:06:41,980 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 06:06:41,980 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 06:06:41,980 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 06:06:41,980 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 06:06:41,980 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 06:06:41,980 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 06:06:41,980 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 06:06:41,981 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 06:06:41,981 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 06:06:41,981 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 06:06:41,981 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 06:06:41,981 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 06:06:41,981 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 06:06:41,981 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 06:06:41,982 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 06:06:41,982 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 06:06:41,982 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 06:06:41,982 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 06:06:41,982 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 06:06:41,982 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 06:06:41,982 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 06:06:41,983 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 06:06:42,217 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 06:06:42,249 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 06:06:42,252 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 06:06:42,253 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 06:06:42,253 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 06:06:42,255 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-02 06:06:43,454 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 06:06:43,669 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 06:06:43,670 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-02 06:06:43,679 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20964bade/b99672d2928a48a38c13a34e1757c4e9/FLAG8ebcab91d [2023-04-02 06:06:43,692 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20964bade/b99672d2928a48a38c13a34e1757c4e9 [2023-04-02 06:06:43,694 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 06:06:43,695 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 06:06:43,696 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 06:06:43,696 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 06:06:43,699 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 06:06:43,700 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 06:06:43" (1/1) ... [2023-04-02 06:06:43,701 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7df65ba2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:06:43, skipping insertion in model container [2023-04-02 06:06:43,701 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 06:06:43" (1/1) ... [2023-04-02 06:06:43,707 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 06:06:43,749 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 06:06:43,898 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-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[5377,5390] [2023-04-02 06:06:43,922 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 06:06:43,935 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 06:06:43,982 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-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[5377,5390] [2023-04-02 06:06:44,006 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 06:06:44,034 INFO L208 MainTranslator]: Completed translation [2023-04-02 06:06:44,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:06:44 WrapperNode [2023-04-02 06:06:44,035 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 06:06:44,036 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 06:06:44,036 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 06:06:44,036 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 06:06:44,046 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:06:44" (1/1) ... [2023-04-02 06:06:44,047 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:06:44" (1/1) ... [2023-04-02 06:06:44,062 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:06:44" (1/1) ... [2023-04-02 06:06:44,062 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:06:44" (1/1) ... [2023-04-02 06:06:44,076 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:06:44" (1/1) ... [2023-04-02 06:06:44,081 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:06:44" (1/1) ... [2023-04-02 06:06:44,085 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:06:44" (1/1) ... [2023-04-02 06:06:44,087 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:06:44" (1/1) ... [2023-04-02 06:06:44,090 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 06:06:44,091 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 06:06:44,092 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 06:06:44,092 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 06:06:44,093 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:06:44" (1/1) ... [2023-04-02 06:06:44,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 06:06:44,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 06:06:44,137 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 06:06:44,183 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 06:06:44,200 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 06:06:44,200 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 06:06:44,203 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 06:06:44,203 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 06:06:44,203 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 06:06:44,203 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 06:06:44,203 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 06:06:44,204 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 06:06:44,204 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 06:06:44,204 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-02 06:06:44,204 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-02 06:06:44,204 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-02 06:06:44,204 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-02 06:06:44,204 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 06:06:44,204 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-02 06:06:44,204 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-02 06:06:44,204 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-02 06:06:44,205 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-02 06:06:44,205 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-02 06:06:44,205 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-02 06:06:44,205 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-02 06:06:44,205 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-02 06:06:44,206 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 06:06:44,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 06:06:44,206 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 06:06:44,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 06:06:44,206 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 06:06:44,206 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 06:06:44,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 06:06:44,379 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 06:06:44,381 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 06:06:44,816 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 06:06:44,825 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 06:06:44,825 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-02 06:06:44,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 06:06:44 BoogieIcfgContainer [2023-04-02 06:06:44,827 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 06:06:44,829 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 06:06:44,830 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 06:06:44,834 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 06:06:44,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 06:06:43" (1/3) ... [2023-04-02 06:06:44,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4325d52e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 06:06:44, skipping insertion in model container [2023-04-02 06:06:44,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:06:44" (2/3) ... [2023-04-02 06:06:44,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4325d52e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 06:06:44, skipping insertion in model container [2023-04-02 06:06:44,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 06:06:44" (3/3) ... [2023-04-02 06:06:44,842 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-02 06:06:44,861 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 06:06:44,861 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 06:06:44,910 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 06:06:44,916 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;@27992c95, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-02 06:06:44,916 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 06:06:44,925 INFO L276 IsEmpty]: Start isEmpty. Operand has 117 states, 111 states have (on average 1.6756756756756757) internal successors, (186), 112 states have internal predecessors, (186), 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 06:06:44,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-02 06:06:44,936 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:06:44,937 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] [2023-04-02 06:06:44,938 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:06:44,943 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:06:44,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1219446879, now seen corresponding path program 1 times [2023-04-02 06:06:44,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:06:44,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111117430] [2023-04-02 06:06:44,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:06:44,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:06:45,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:06:45,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:06:45,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:06:45,562 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 06:06:45,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:06:45,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111117430] [2023-04-02 06:06:45,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111117430] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:06:45,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:06:45,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:06:45,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588231408] [2023-04-02 06:06:45,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:06:45,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:06:45,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:06:45,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:06:45,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:06:45,618 INFO L87 Difference]: Start difference. First operand has 117 states, 111 states have (on average 1.6756756756756757) internal successors, (186), 112 states have internal predecessors, (186), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 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 06:06:46,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:06:46,433 INFO L93 Difference]: Finished difference Result 273 states and 432 transitions. [2023-04-02 06:06:46,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:06:46,436 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 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 53 [2023-04-02 06:06:46,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:06:46,450 INFO L225 Difference]: With dead ends: 273 [2023-04-02 06:06:46,450 INFO L226 Difference]: Without dead ends: 179 [2023-04-02 06:06:46,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:06:46,462 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 134 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 06:06:46,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 394 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 06:06:46,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-04-02 06:06:46,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 177. [2023-04-02 06:06:46,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 173 states have (on average 1.5028901734104045) internal successors, (260), 173 states have internal predecessors, (260), 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 06:06:46,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 263 transitions. [2023-04-02 06:06:46,547 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 263 transitions. Word has length 53 [2023-04-02 06:06:46,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:06:46,548 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 263 transitions. [2023-04-02 06:06:46,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 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 06:06:46,549 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 263 transitions. [2023-04-02 06:06:46,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-02 06:06:46,551 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:06:46,551 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:06:46,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 06:06:46,552 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:06:46,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:06:46,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1360956210, now seen corresponding path program 1 times [2023-04-02 06:06:46,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:06:46,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431081869] [2023-04-02 06:06:46,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:06:46,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:06:46,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:06:46,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:06:46,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:06:46,813 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 06:06:46,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:06:46,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431081869] [2023-04-02 06:06:46,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431081869] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:06:46,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:06:46,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:06:46,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831374163] [2023-04-02 06:06:46,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:06:46,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:06:46,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:06:46,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:06:46,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:06:46,818 INFO L87 Difference]: Start difference. First operand 177 states and 263 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 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 06:06:47,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:06:47,343 INFO L93 Difference]: Finished difference Result 437 states and 675 transitions. [2023-04-02 06:06:47,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:06:47,344 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 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 54 [2023-04-02 06:06:47,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:06:47,346 INFO L225 Difference]: With dead ends: 437 [2023-04-02 06:06:47,346 INFO L226 Difference]: Without dead ends: 291 [2023-04-02 06:06:47,347 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 06:06:47,349 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 111 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:06:47,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 333 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:06:47,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2023-04-02 06:06:47,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 289. [2023-04-02 06:06:47,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 285 states have (on average 1.5333333333333334) internal successors, (437), 285 states have internal predecessors, (437), 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 06:06:47,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 440 transitions. [2023-04-02 06:06:47,399 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 440 transitions. Word has length 54 [2023-04-02 06:06:47,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:06:47,400 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 440 transitions. [2023-04-02 06:06:47,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 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 06:06:47,400 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 440 transitions. [2023-04-02 06:06:47,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-02 06:06:47,402 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:06:47,402 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] [2023-04-02 06:06:47,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 06:06:47,402 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:06:47,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:06:47,403 INFO L85 PathProgramCache]: Analyzing trace with hash -2073457344, now seen corresponding path program 1 times [2023-04-02 06:06:47,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:06:47,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939007485] [2023-04-02 06:06:47,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:06:47,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:06:47,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:06:47,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:06:47,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:06:47,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:06:47,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:06:47,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939007485] [2023-04-02 06:06:47,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939007485] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:06:47,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:06:47,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:06:47,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394881491] [2023-04-02 06:06:47,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:06:47,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:06:47,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:06:47,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:06:47,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:06:47,616 INFO L87 Difference]: Start difference. First operand 289 states and 440 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 states have internal predecessors, (52), 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 06:06:48,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:06:48,051 INFO L93 Difference]: Finished difference Result 741 states and 1154 transitions. [2023-04-02 06:06:48,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:06:48,052 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 states have internal predecessors, (52), 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 55 [2023-04-02 06:06:48,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:06:48,055 INFO L225 Difference]: With dead ends: 741 [2023-04-02 06:06:48,055 INFO L226 Difference]: Without dead ends: 483 [2023-04-02 06:06:48,056 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 06:06:48,057 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 106 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:06:48,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 318 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:06:48,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2023-04-02 06:06:48,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 481. [2023-04-02 06:06:48,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 477 states have (on average 1.5450733752620545) internal successors, (737), 477 states have internal predecessors, (737), 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 06:06:48,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 740 transitions. [2023-04-02 06:06:48,117 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 740 transitions. Word has length 55 [2023-04-02 06:06:48,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:06:48,118 INFO L495 AbstractCegarLoop]: Abstraction has 481 states and 740 transitions. [2023-04-02 06:06:48,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 states have internal predecessors, (52), 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 06:06:48,119 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 740 transitions. [2023-04-02 06:06:48,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-02 06:06:48,126 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:06:48,126 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] [2023-04-02 06:06:48,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 06:06:48,127 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:06:48,127 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:06:48,127 INFO L85 PathProgramCache]: Analyzing trace with hash 799182967, now seen corresponding path program 1 times [2023-04-02 06:06:48,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:06:48,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273475763] [2023-04-02 06:06:48,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:06:48,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:06:48,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:06:48,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:06:48,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:06:48,375 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 06:06:48,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:06:48,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273475763] [2023-04-02 06:06:48,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273475763] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:06:48,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:06:48,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 06:06:48,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847155213] [2023-04-02 06:06:48,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:06:48,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 06:06:48,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:06:48,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 06:06:48,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 06:06:48,378 INFO L87 Difference]: Start difference. First operand 481 states and 740 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 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 06:06:49,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:06:49,062 INFO L93 Difference]: Finished difference Result 2731 states and 4285 transitions. [2023-04-02 06:06:49,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 06:06:49,062 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 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 56 [2023-04-02 06:06:49,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:06:49,073 INFO L225 Difference]: With dead ends: 2731 [2023-04-02 06:06:49,074 INFO L226 Difference]: Without dead ends: 2281 [2023-04-02 06:06:49,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2023-04-02 06:06:49,077 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 929 mSDsluCounter, 1181 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 929 SdHoareTripleChecker+Valid, 1338 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:06:49,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [929 Valid, 1338 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:06:49,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2281 states. [2023-04-02 06:06:49,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2281 to 929. [2023-04-02 06:06:49,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 925 states have (on average 1.5448648648648649) internal successors, (1429), 925 states have internal predecessors, (1429), 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 06:06:49,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 1432 transitions. [2023-04-02 06:06:49,236 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 1432 transitions. Word has length 56 [2023-04-02 06:06:49,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:06:49,236 INFO L495 AbstractCegarLoop]: Abstraction has 929 states and 1432 transitions. [2023-04-02 06:06:49,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 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 06:06:49,237 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 1432 transitions. [2023-04-02 06:06:49,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-02 06:06:49,237 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:06:49,238 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] [2023-04-02 06:06:49,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 06:06:49,238 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:06:49,238 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:06:49,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1013664547, now seen corresponding path program 1 times [2023-04-02 06:06:49,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:06:49,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017217831] [2023-04-02 06:06:49,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:06:49,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:06:49,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:06:49,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:06:49,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:06:49,498 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 06:06:49,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:06:49,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017217831] [2023-04-02 06:06:49,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017217831] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:06:49,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:06:49,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 06:06:49,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204397358] [2023-04-02 06:06:49,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:06:49,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 06:06:49,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:06:49,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 06:06:49,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-02 06:06:49,501 INFO L87 Difference]: Start difference. First operand 929 states and 1432 transitions. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 6 states have internal predecessors, (54), 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 06:06:50,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:06:50,725 INFO L93 Difference]: Finished difference Result 4033 states and 6236 transitions. [2023-04-02 06:06:50,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:06:50,726 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 6 states have internal predecessors, (54), 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 57 [2023-04-02 06:06:50,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:06:50,739 INFO L225 Difference]: With dead ends: 4033 [2023-04-02 06:06:50,739 INFO L226 Difference]: Without dead ends: 3135 [2023-04-02 06:06:50,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-02 06:06:50,743 INFO L413 NwaCegarLoop]: 363 mSDtfsCounter, 464 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 828 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-02 06:06:50,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [464 Valid, 828 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-02 06:06:50,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3135 states. [2023-04-02 06:06:51,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3135 to 3129. [2023-04-02 06:06:51,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3129 states, 3125 states have (on average 1.54016) internal successors, (4813), 3125 states have internal predecessors, (4813), 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 06:06:51,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3129 states to 3129 states and 4816 transitions. [2023-04-02 06:06:51,275 INFO L78 Accepts]: Start accepts. Automaton has 3129 states and 4816 transitions. Word has length 57 [2023-04-02 06:06:51,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:06:51,275 INFO L495 AbstractCegarLoop]: Abstraction has 3129 states and 4816 transitions. [2023-04-02 06:06:51,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 6 states have internal predecessors, (54), 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 06:06:51,276 INFO L276 IsEmpty]: Start isEmpty. Operand 3129 states and 4816 transitions. [2023-04-02 06:06:51,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-02 06:06:51,277 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:06:51,277 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] [2023-04-02 06:06:51,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-02 06:06:51,277 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:06:51,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:06:51,278 INFO L85 PathProgramCache]: Analyzing trace with hash 517789944, now seen corresponding path program 1 times [2023-04-02 06:06:51,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:06:51,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653924136] [2023-04-02 06:06:51,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:06:51,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:06:51,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:06:51,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:06:51,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:06:51,435 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 06:06:51,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:06:51,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653924136] [2023-04-02 06:06:51,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653924136] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:06:51,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:06:51,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:06:51,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330218864] [2023-04-02 06:06:51,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:06:51,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:06:51,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:06:51,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:06:51,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:06:51,438 INFO L87 Difference]: Start difference. First operand 3129 states and 4816 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 3 states have internal predecessors, (55), 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 06:06:52,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:06:52,663 INFO L93 Difference]: Finished difference Result 8253 states and 12658 transitions. [2023-04-02 06:06:52,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:06:52,663 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 3 states have internal predecessors, (55), 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 58 [2023-04-02 06:06:52,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:06:52,686 INFO L225 Difference]: With dead ends: 8253 [2023-04-02 06:06:52,687 INFO L226 Difference]: Without dead ends: 5155 [2023-04-02 06:06:52,696 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 06:06:52,697 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 118 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:06:52,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 373 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:06:52,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5155 states. [2023-04-02 06:06:53,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5155 to 5153. [2023-04-02 06:06:53,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5153 states, 5149 states have (on average 1.5158283161778987) internal successors, (7805), 5149 states have internal predecessors, (7805), 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 06:06:53,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5153 states to 5153 states and 7808 transitions. [2023-04-02 06:06:53,491 INFO L78 Accepts]: Start accepts. Automaton has 5153 states and 7808 transitions. Word has length 58 [2023-04-02 06:06:53,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:06:53,491 INFO L495 AbstractCegarLoop]: Abstraction has 5153 states and 7808 transitions. [2023-04-02 06:06:53,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 3 states have internal predecessors, (55), 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 06:06:53,492 INFO L276 IsEmpty]: Start isEmpty. Operand 5153 states and 7808 transitions. [2023-04-02 06:06:53,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-02 06:06:53,492 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:06:53,493 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] [2023-04-02 06:06:53,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-02 06:06:53,493 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:06:53,494 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:06:53,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1438401172, now seen corresponding path program 1 times [2023-04-02 06:06:53,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:06:53,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079107076] [2023-04-02 06:06:53,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:06:53,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:06:53,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:06:53,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:06:53,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:06:53,728 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 06:06:53,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:06:53,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079107076] [2023-04-02 06:06:53,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079107076] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:06:53,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:06:53,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 06:06:53,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396054853] [2023-04-02 06:06:53,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:06:53,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:06:53,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:06:53,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:06:53,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:06:53,731 INFO L87 Difference]: Start difference. First operand 5153 states and 7808 transitions. Second operand has 6 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 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 06:06:55,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:06:55,265 INFO L93 Difference]: Finished difference Result 15397 states and 23362 transitions. [2023-04-02 06:06:55,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:06:55,266 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 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 59 [2023-04-02 06:06:55,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:06:55,306 INFO L225 Difference]: With dead ends: 15397 [2023-04-02 06:06:55,307 INFO L226 Difference]: Without dead ends: 10275 [2023-04-02 06:06:55,321 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 06:06:55,322 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 684 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:06:55,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [684 Valid, 183 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:06:55,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10275 states. [2023-04-02 06:06:56,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10275 to 10273. [2023-04-02 06:06:56,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10273 states, 10269 states have (on average 1.50637842048885) internal successors, (15469), 10269 states have internal predecessors, (15469), 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 06:06:56,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10273 states to 10273 states and 15472 transitions. [2023-04-02 06:06:56,890 INFO L78 Accepts]: Start accepts. Automaton has 10273 states and 15472 transitions. Word has length 59 [2023-04-02 06:06:56,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:06:56,890 INFO L495 AbstractCegarLoop]: Abstraction has 10273 states and 15472 transitions. [2023-04-02 06:06:56,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 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 06:06:56,891 INFO L276 IsEmpty]: Start isEmpty. Operand 10273 states and 15472 transitions. [2023-04-02 06:06:56,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-02 06:06:56,892 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:06:56,892 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] [2023-04-02 06:06:56,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-02 06:06:56,892 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:06:56,893 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:06:56,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1086594417, now seen corresponding path program 1 times [2023-04-02 06:06:56,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:06:56,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220847983] [2023-04-02 06:06:56,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:06:56,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:06:56,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:06:57,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:06:57,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:06:57,270 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 06:06:57,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:06:57,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220847983] [2023-04-02 06:06:57,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220847983] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:06:57,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:06:57,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 06:06:57,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517560258] [2023-04-02 06:06:57,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:06:57,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:06:57,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:06:57,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:06:57,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:06:57,273 INFO L87 Difference]: Start difference. First operand 10273 states and 15472 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 states have internal predecessors, (56), 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 06:07:00,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:07:00,235 INFO L93 Difference]: Finished difference Result 21027 states and 31425 transitions. [2023-04-02 06:07:00,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:07:00,236 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 states have internal predecessors, (56), 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 59 [2023-04-02 06:07:00,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:07:00,300 INFO L225 Difference]: With dead ends: 21027 [2023-04-02 06:07:00,301 INFO L226 Difference]: Without dead ends: 21025 [2023-04-02 06:07:00,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 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 06:07:00,311 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 248 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 780 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:07:00,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 780 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:07:00,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21025 states. [2023-04-02 06:07:01,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21025 to 10785. [2023-04-02 06:07:01,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10785 states, 10781 states have (on average 1.482330025044059) internal successors, (15981), 10781 states have internal predecessors, (15981), 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 06:07:02,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10785 states to 10785 states and 15984 transitions. [2023-04-02 06:07:02,014 INFO L78 Accepts]: Start accepts. Automaton has 10785 states and 15984 transitions. Word has length 59 [2023-04-02 06:07:02,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:07:02,016 INFO L495 AbstractCegarLoop]: Abstraction has 10785 states and 15984 transitions. [2023-04-02 06:07:02,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 states have internal predecessors, (56), 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 06:07:02,017 INFO L276 IsEmpty]: Start isEmpty. Operand 10785 states and 15984 transitions. [2023-04-02 06:07:02,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-02 06:07:02,018 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:07:02,018 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] [2023-04-02 06:07:02,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-02 06:07:02,018 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:07:02,018 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:07:02,019 INFO L85 PathProgramCache]: Analyzing trace with hash 684931188, now seen corresponding path program 1 times [2023-04-02 06:07:02,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:07:02,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768298504] [2023-04-02 06:07:02,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:07:02,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:07:02,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:07:02,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:07:02,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:07:02,219 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 06:07:02,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:07:02,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768298504] [2023-04-02 06:07:02,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768298504] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:07:02,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:07:02,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:07:02,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91854516] [2023-04-02 06:07:02,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:07:02,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:07:02,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:07:02,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:07:02,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:07:02,225 INFO L87 Difference]: Start difference. First operand 10785 states and 15984 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 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 06:07:04,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:07:04,518 INFO L93 Difference]: Finished difference Result 24015 states and 35528 transitions. [2023-04-02 06:07:04,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:07:04,519 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 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 60 [2023-04-02 06:07:04,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:07:04,561 INFO L225 Difference]: With dead ends: 24015 [2023-04-02 06:07:04,561 INFO L226 Difference]: Without dead ends: 13261 [2023-04-02 06:07:04,590 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 06:07:04,590 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 93 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:07:04,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 283 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:07:04,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13261 states. [2023-04-02 06:07:06,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13261 to 13203. [2023-04-02 06:07:06,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13203 states, 13199 states have (on average 1.4700356087582394) internal successors, (19403), 13199 states have internal predecessors, (19403), 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 06:07:06,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13203 states to 13203 states and 19406 transitions. [2023-04-02 06:07:06,201 INFO L78 Accepts]: Start accepts. Automaton has 13203 states and 19406 transitions. Word has length 60 [2023-04-02 06:07:06,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:07:06,202 INFO L495 AbstractCegarLoop]: Abstraction has 13203 states and 19406 transitions. [2023-04-02 06:07:06,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 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 06:07:06,202 INFO L276 IsEmpty]: Start isEmpty. Operand 13203 states and 19406 transitions. [2023-04-02 06:07:06,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-04-02 06:07:06,216 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:07:06,217 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-02 06:07:06,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-02 06:07:06,217 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:07:06,217 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:07:06,218 INFO L85 PathProgramCache]: Analyzing trace with hash -56548071, now seen corresponding path program 1 times [2023-04-02 06:07:06,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:07:06,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687841417] [2023-04-02 06:07:06,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:07:06,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:07:06,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:07:06,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:07:06,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:07:06,423 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:07:06,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:07:06,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687841417] [2023-04-02 06:07:06,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687841417] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:07:06,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:07:06,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:07:06,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916960892] [2023-04-02 06:07:06,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:07:06,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:07:06,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:07:06,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:07:06,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:07:06,426 INFO L87 Difference]: Start difference. First operand 13203 states and 19406 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 3 states have internal predecessors, (80), 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 06:07:09,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:07:09,373 INFO L93 Difference]: Finished difference Result 32696 states and 48098 transitions. [2023-04-02 06:07:09,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 06:07:09,374 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 3 states have internal predecessors, (80), 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 83 [2023-04-02 06:07:09,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:07:09,435 INFO L225 Difference]: With dead ends: 32696 [2023-04-02 06:07:09,435 INFO L226 Difference]: Without dead ends: 22206 [2023-04-02 06:07:09,459 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 06:07:09,460 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 93 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:07:09,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 386 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:07:09,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22206 states. [2023-04-02 06:07:12,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22206 to 22204. [2023-04-02 06:07:12,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22204 states, 22200 states have (on average 1.4564414414414415) internal successors, (32333), 22200 states have internal predecessors, (32333), 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 06:07:12,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22204 states to 22204 states and 32336 transitions. [2023-04-02 06:07:12,389 INFO L78 Accepts]: Start accepts. Automaton has 22204 states and 32336 transitions. Word has length 83 [2023-04-02 06:07:12,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:07:12,389 INFO L495 AbstractCegarLoop]: Abstraction has 22204 states and 32336 transitions. [2023-04-02 06:07:12,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 3 states have internal predecessors, (80), 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 06:07:12,390 INFO L276 IsEmpty]: Start isEmpty. Operand 22204 states and 32336 transitions. [2023-04-02 06:07:12,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-04-02 06:07:12,407 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:07:12,410 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-02 06:07:12,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-02 06:07:12,411 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:07:12,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:07:12,412 INFO L85 PathProgramCache]: Analyzing trace with hash 560712867, now seen corresponding path program 1 times [2023-04-02 06:07:12,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:07:12,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604020912] [2023-04-02 06:07:12,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:07:12,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:07:12,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:07:12,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:07:12,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:07:12,912 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:07:12,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:07:12,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604020912] [2023-04-02 06:07:12,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604020912] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 06:07:12,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648203190] [2023-04-02 06:07:12,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:07:12,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 06:07:12,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 06:07:12,921 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 06:07:12,948 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 06:07:13,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:07:13,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 06:07:13,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 06:07:13,349 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 06:07:13,350 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 06:07:13,543 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 06:07:13,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648203190] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 06:07:13,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 06:07:13,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4, 4] total 15 [2023-04-02 06:07:13,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229557336] [2023-04-02 06:07:13,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 06:07:13,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-02 06:07:13,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:07:13,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-02 06:07:13,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2023-04-02 06:07:13,546 INFO L87 Difference]: Start difference. First operand 22204 states and 32336 transitions. Second operand has 15 states, 15 states have (on average 15.133333333333333) internal successors, (227), 14 states have internal predecessors, (227), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 06:07:50,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:07:50,210 INFO L93 Difference]: Finished difference Result 207808 states and 297908 transitions. [2023-04-02 06:07:50,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2023-04-02 06:07:50,210 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 15.133333333333333) internal successors, (227), 14 states have internal predecessors, (227), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 83 [2023-04-02 06:07:50,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:07:50,895 INFO L225 Difference]: With dead ends: 207808 [2023-04-02 06:07:50,896 INFO L226 Difference]: Without dead ends: 187582 [2023-04-02 06:07:50,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7184 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3020, Invalid=13750, Unknown=0, NotChecked=0, Total=16770 [2023-04-02 06:07:50,988 INFO L413 NwaCegarLoop]: 592 mSDtfsCounter, 8888 mSDsluCounter, 3043 mSDsCounter, 0 mSdLazyCounter, 4215 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8888 SdHoareTripleChecker+Valid, 3635 SdHoareTripleChecker+Invalid, 4280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 4215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-04-02 06:07:50,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8888 Valid, 3635 Invalid, 4280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 4215 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-04-02 06:07:51,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187582 states. [2023-04-02 06:08:09,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187582 to 101416. [2023-04-02 06:08:09,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101416 states, 101412 states have (on average 1.4248905454975742) internal successors, (144501), 101412 states have internal predecessors, (144501), 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 06:08:09,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101416 states to 101416 states and 144504 transitions. [2023-04-02 06:08:09,609 INFO L78 Accepts]: Start accepts. Automaton has 101416 states and 144504 transitions. Word has length 83 [2023-04-02 06:08:09,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:08:09,609 INFO L495 AbstractCegarLoop]: Abstraction has 101416 states and 144504 transitions. [2023-04-02 06:08:09,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 15.133333333333333) internal successors, (227), 14 states have internal predecessors, (227), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 06:08:09,610 INFO L276 IsEmpty]: Start isEmpty. Operand 101416 states and 144504 transitions. [2023-04-02 06:08:09,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-04-02 06:08:09,628 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:08:09,629 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-02 06:08:09,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 06:08:09,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-02 06:08:09,838 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:08:09,839 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:08:09,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1555245675, now seen corresponding path program 1 times [2023-04-02 06:08:09,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:08:09,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213444412] [2023-04-02 06:08:09,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:08:09,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:08:09,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:08:10,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:08:10,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:08:10,094 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-02 06:08:10,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:08:10,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213444412] [2023-04-02 06:08:10,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213444412] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:08:10,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:08:10,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 06:08:10,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495728941] [2023-04-02 06:08:10,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:08:10,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 06:08:10,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:08:10,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 06:08:10,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-02 06:08:10,097 INFO L87 Difference]: Start difference. First operand 101416 states and 144504 transitions. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 6 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 06:08:39,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:08:39,168 INFO L93 Difference]: Finished difference Result 212852 states and 305129 transitions. [2023-04-02 06:08:39,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 06:08:39,169 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 6 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 83 [2023-04-02 06:08:39,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:08:39,575 INFO L225 Difference]: With dead ends: 212852 [2023-04-02 06:08:39,576 INFO L226 Difference]: Without dead ends: 168578 [2023-04-02 06:08:39,675 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 06:08:39,676 INFO L413 NwaCegarLoop]: 289 mSDtfsCounter, 735 mSDsluCounter, 743 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 735 SdHoareTripleChecker+Valid, 1032 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:08:39,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [735 Valid, 1032 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:08:39,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168578 states. [2023-04-02 06:09:04,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168578 to 137288. [2023-04-02 06:09:04,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137288 states, 137284 states have (on average 1.4211197226188048) internal successors, (195097), 137284 states have internal predecessors, (195097), 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 06:09:04,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137288 states to 137288 states and 195100 transitions. [2023-04-02 06:09:04,821 INFO L78 Accepts]: Start accepts. Automaton has 137288 states and 195100 transitions. Word has length 83 [2023-04-02 06:09:04,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:09:04,821 INFO L495 AbstractCegarLoop]: Abstraction has 137288 states and 195100 transitions. [2023-04-02 06:09:04,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 6 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 06:09:04,821 INFO L276 IsEmpty]: Start isEmpty. Operand 137288 states and 195100 transitions. [2023-04-02 06:09:04,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-04-02 06:09:04,838 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:09:04,838 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-02 06:09:04,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-02 06:09:04,838 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:09:04,839 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:09:04,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1261270772, now seen corresponding path program 1 times [2023-04-02 06:09:04,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:09:04,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980500325] [2023-04-02 06:09:04,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:09:04,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:09:04,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:09:05,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:09:05,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:09:05,022 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:09:05,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:09:05,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980500325] [2023-04-02 06:09:05,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980500325] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:09:05,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:09:05,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:09:05,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846828127] [2023-04-02 06:09:05,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:09:05,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:09:05,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:09:05,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:09:05,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:09:05,024 INFO L87 Difference]: Start difference. First operand 137288 states and 195100 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 3 states have internal predecessors, (80), 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)