./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/systemc/token_ring.02.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/systemc/token_ring.02.cil-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 44ef362a593e25f5681bc4a034b065cd86559bd3dd750386bca2a1f270891ccd --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 17:37:43,798 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 17:37:43,800 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 17:37:43,827 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 17:37:43,828 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 17:37:43,829 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 17:37:43,830 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 17:37:43,832 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 17:37:43,833 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 17:37:43,837 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 17:37:43,838 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 17:37:43,840 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 17:37:43,840 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 17:37:43,842 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 17:37:43,843 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 17:37:43,846 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 17:37:43,847 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 17:37:43,848 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 17:37:43,849 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 17:37:43,854 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 17:37:43,856 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 17:37:43,857 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 17:37:43,857 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 17:37:43,858 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 17:37:43,859 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 17:37:43,865 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 17:37:43,865 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 17:37:43,866 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 17:37:43,867 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 17:37:43,867 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 17:37:43,868 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 17:37:43,869 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 17:37:43,871 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 17:37:43,871 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 17:37:43,872 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 17:37:43,872 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 17:37:43,873 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 17:37:43,873 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 17:37:43,873 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 17:37:43,874 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 17:37:43,874 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 17:37:43,876 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 17:37:43,877 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 17:37:43,906 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 17:37:43,907 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 17:37:43,907 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 17:37:43,907 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 17:37:43,908 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 17:37:43,908 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 17:37:43,909 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 17:37:43,909 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 17:37:43,909 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 17:37:43,910 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 17:37:43,910 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 17:37:43,910 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 17:37:43,910 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 17:37:43,911 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 17:37:43,911 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 17:37:43,911 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 17:37:43,911 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 17:37:43,911 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 17:37:43,911 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 17:37:43,912 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 17:37:43,912 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 17:37:43,912 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 17:37:43,912 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 17:37:43,912 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 17:37:43,912 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 17:37:43,913 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 17:37:43,913 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 17:37:43,913 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 17:37:43,913 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 17:37:43,913 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 17:37:43,914 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 17:37:43,914 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 17:37:43,914 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 17:37:43,914 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 44ef362a593e25f5681bc4a034b065cd86559bd3dd750386bca2a1f270891ccd [2022-07-19 17:37:44,141 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 17:37:44,162 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 17:37:44,164 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 17:37:44,165 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 17:37:44,166 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 17:37:44,167 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/token_ring.02.cil-1.c [2022-07-19 17:37:44,212 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad812de3a/dddeb696387f4b938f7195d97502b097/FLAG4d6983411 [2022-07-19 17:37:44,555 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 17:37:44,555 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.02.cil-1.c [2022-07-19 17:37:44,562 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad812de3a/dddeb696387f4b938f7195d97502b097/FLAG4d6983411 [2022-07-19 17:37:44,983 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad812de3a/dddeb696387f4b938f7195d97502b097 [2022-07-19 17:37:44,985 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 17:37:44,986 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 17:37:44,989 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 17:37:44,989 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 17:37:44,991 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 17:37:44,992 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 05:37:44" (1/1) ... [2022-07-19 17:37:44,993 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f06c955 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:37:44, skipping insertion in model container [2022-07-19 17:37:44,993 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 05:37:44" (1/1) ... [2022-07-19 17:37:44,998 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 17:37:45,028 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 17:37:45,175 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.02.cil-1.c[671,684] [2022-07-19 17:37:45,238 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 17:37:45,248 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 17:37:45,261 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.02.cil-1.c[671,684] [2022-07-19 17:37:45,297 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 17:37:45,322 INFO L208 MainTranslator]: Completed translation [2022-07-19 17:37:45,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:37:45 WrapperNode [2022-07-19 17:37:45,327 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 17:37:45,328 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 17:37:45,328 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 17:37:45,328 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 17:37:45,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:37:45" (1/1) ... [2022-07-19 17:37:45,354 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:37:45" (1/1) ... [2022-07-19 17:37:45,372 INFO L137 Inliner]: procedures = 32, calls = 37, calls flagged for inlining = 16, calls inlined = 16, statements flattened = 273 [2022-07-19 17:37:45,373 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 17:37:45,373 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 17:37:45,373 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 17:37:45,373 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 17:37:45,379 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:37:45" (1/1) ... [2022-07-19 17:37:45,380 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:37:45" (1/1) ... [2022-07-19 17:37:45,387 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:37:45" (1/1) ... [2022-07-19 17:37:45,388 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:37:45" (1/1) ... [2022-07-19 17:37:45,393 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:37:45" (1/1) ... [2022-07-19 17:37:45,406 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:37:45" (1/1) ... [2022-07-19 17:37:45,409 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:37:45" (1/1) ... [2022-07-19 17:37:45,414 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 17:37:45,416 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 17:37:45,416 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 17:37:45,417 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 17:37:45,417 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:37:45" (1/1) ... [2022-07-19 17:37:45,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 17:37:45,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:37:45,443 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) [2022-07-19 17:37:45,462 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 [2022-07-19 17:37:45,473 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 17:37:45,473 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-07-19 17:37:45,473 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-07-19 17:37:45,474 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-07-19 17:37:45,474 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-07-19 17:37:45,474 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-07-19 17:37:45,474 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-07-19 17:37:45,474 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-07-19 17:37:45,474 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-07-19 17:37:45,474 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-07-19 17:37:45,475 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-07-19 17:37:45,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 17:37:45,475 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-07-19 17:37:45,475 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-07-19 17:37:45,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 17:37:45,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 17:37:45,525 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 17:37:45,527 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 17:37:45,796 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 17:37:45,803 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 17:37:45,803 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-07-19 17:37:45,805 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 05:37:45 BoogieIcfgContainer [2022-07-19 17:37:45,805 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 17:37:45,806 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 17:37:45,806 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 17:37:45,814 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 17:37:45,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 05:37:44" (1/3) ... [2022-07-19 17:37:45,815 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@279957f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 05:37:45, skipping insertion in model container [2022-07-19 17:37:45,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:37:45" (2/3) ... [2022-07-19 17:37:45,815 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@279957f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 05:37:45, skipping insertion in model container [2022-07-19 17:37:45,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 05:37:45" (3/3) ... [2022-07-19 17:37:45,817 INFO L111 eAbstractionObserver]: Analyzing ICFG token_ring.02.cil-1.c [2022-07-19 17:37:45,828 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 17:37:45,828 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 17:37:45,894 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 17:37:45,901 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6a96d43a, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@752a17e4 [2022-07-19 17:37:45,901 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 17:37:45,909 INFO L276 IsEmpty]: Start isEmpty. Operand has 132 states, 108 states have (on average 1.5648148148148149) internal successors, (169), 110 states have internal predecessors, (169), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-19 17:37:45,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-19 17:37:45,921 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:37:45,922 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:37:45,923 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:37:45,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:37:45,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1341411477, now seen corresponding path program 1 times [2022-07-19 17:37:45,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:37:45,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157035475] [2022-07-19 17:37:45,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:37:45,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:37:46,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:46,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:37:46,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:46,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-19 17:37:46,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:46,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 17:37:46,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:46,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 17:37:46,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:46,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-19 17:37:46,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:46,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 17:37:46,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:37:46,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157035475] [2022-07-19 17:37:46,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157035475] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:37:46,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:37:46,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 17:37:46,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335786159] [2022-07-19 17:37:46,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:37:46,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 17:37:46,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:37:46,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 17:37:46,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 17:37:46,282 INFO L87 Difference]: Start difference. First operand has 132 states, 108 states have (on average 1.5648148148148149) internal successors, (169), 110 states have internal predecessors, (169), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 17:37:46,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:37:46,681 INFO L93 Difference]: Finished difference Result 289 states and 448 transitions. [2022-07-19 17:37:46,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 17:37:46,683 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 67 [2022-07-19 17:37:46,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:37:46,691 INFO L225 Difference]: With dead ends: 289 [2022-07-19 17:37:46,706 INFO L226 Difference]: Without dead ends: 159 [2022-07-19 17:37:46,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-19 17:37:46,713 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 284 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 17:37:46,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 337 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 17:37:46,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-07-19 17:37:46,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 127. [2022-07-19 17:37:46,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 104 states have (on average 1.4615384615384615) internal successors, (152), 105 states have internal predecessors, (152), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-19 17:37:46,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 184 transitions. [2022-07-19 17:37:46,774 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 184 transitions. Word has length 67 [2022-07-19 17:37:46,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:37:46,774 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 184 transitions. [2022-07-19 17:37:46,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 17:37:46,775 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 184 transitions. [2022-07-19 17:37:46,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-19 17:37:46,777 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:37:46,777 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:37:46,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 17:37:46,778 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:37:46,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:37:46,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1139587543, now seen corresponding path program 1 times [2022-07-19 17:37:46,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:37:46,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078518567] [2022-07-19 17:37:46,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:37:46,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:37:46,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:46,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:37:46,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:46,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-19 17:37:46,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:46,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 17:37:46,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:46,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 17:37:46,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:46,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-19 17:37:46,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:46,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 17:37:46,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:37:46,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078518567] [2022-07-19 17:37:46,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078518567] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:37:46,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:37:46,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 17:37:46,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112508484] [2022-07-19 17:37:46,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:37:46,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 17:37:46,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:37:46,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 17:37:46,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 17:37:46,922 INFO L87 Difference]: Start difference. First operand 127 states and 184 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 17:37:47,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:37:47,455 INFO L93 Difference]: Finished difference Result 423 states and 631 transitions. [2022-07-19 17:37:47,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 17:37:47,455 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 67 [2022-07-19 17:37:47,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:37:47,458 INFO L225 Difference]: With dead ends: 423 [2022-07-19 17:37:47,458 INFO L226 Difference]: Without dead ends: 306 [2022-07-19 17:37:47,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-07-19 17:37:47,460 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 403 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 17:37:47,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [412 Valid, 556 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 17:37:47,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-07-19 17:37:47,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 243. [2022-07-19 17:37:47,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 202 states have (on average 1.4752475247524752) internal successors, (298), 204 states have internal predecessors, (298), 27 states have call successors, (27), 12 states have call predecessors, (27), 13 states have return successors, (30), 27 states have call predecessors, (30), 27 states have call successors, (30) [2022-07-19 17:37:47,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 355 transitions. [2022-07-19 17:37:47,480 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 355 transitions. Word has length 67 [2022-07-19 17:37:47,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:37:47,480 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 355 transitions. [2022-07-19 17:37:47,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 17:37:47,481 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 355 transitions. [2022-07-19 17:37:47,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-19 17:37:47,482 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:37:47,482 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:37:47,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 17:37:47,483 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:37:47,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:37:47,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1628045733, now seen corresponding path program 1 times [2022-07-19 17:37:47,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:37:47,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978470292] [2022-07-19 17:37:47,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:37:47,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:37:47,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:47,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:37:47,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:47,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-19 17:37:47,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:47,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 17:37:47,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:47,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 17:37:47,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:47,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-19 17:37:47,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:47,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 17:37:47,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:37:47,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978470292] [2022-07-19 17:37:47,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978470292] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:37:47,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:37:47,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 17:37:47,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456526609] [2022-07-19 17:37:47,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:37:47,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 17:37:47,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:37:47,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 17:37:47,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 17:37:47,598 INFO L87 Difference]: Start difference. First operand 243 states and 355 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 17:37:48,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:37:48,286 INFO L93 Difference]: Finished difference Result 686 states and 1015 transitions. [2022-07-19 17:37:48,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 17:37:48,287 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 67 [2022-07-19 17:37:48,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:37:48,289 INFO L225 Difference]: With dead ends: 686 [2022-07-19 17:37:48,289 INFO L226 Difference]: Without dead ends: 453 [2022-07-19 17:37:48,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-19 17:37:48,292 INFO L413 NwaCegarLoop]: 287 mSDtfsCounter, 393 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 17:37:48,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [402 Valid, 879 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 857 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 17:37:48,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2022-07-19 17:37:48,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 352. [2022-07-19 17:37:48,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 293 states have (on average 1.4675767918088738) internal successors, (430), 296 states have internal predecessors, (430), 38 states have call successors, (38), 18 states have call predecessors, (38), 20 states have return successors, (43), 39 states have call predecessors, (43), 38 states have call successors, (43) [2022-07-19 17:37:48,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 511 transitions. [2022-07-19 17:37:48,327 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 511 transitions. Word has length 67 [2022-07-19 17:37:48,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:37:48,329 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 511 transitions. [2022-07-19 17:37:48,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 17:37:48,329 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 511 transitions. [2022-07-19 17:37:48,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-19 17:37:48,334 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:37:48,335 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:37:48,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 17:37:48,335 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:37:48,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:37:48,336 INFO L85 PathProgramCache]: Analyzing trace with hash -752026727, now seen corresponding path program 1 times [2022-07-19 17:37:48,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:37:48,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987110381] [2022-07-19 17:37:48,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:37:48,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:37:48,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:48,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:37:48,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:48,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-19 17:37:48,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:48,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 17:37:48,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:48,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 17:37:48,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:48,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-19 17:37:48,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:48,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 17:37:48,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:37:48,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987110381] [2022-07-19 17:37:48,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987110381] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:37:48,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:37:48,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 17:37:48,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617433061] [2022-07-19 17:37:48,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:37:48,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 17:37:48,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:37:48,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 17:37:48,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 17:37:48,429 INFO L87 Difference]: Start difference. First operand 352 states and 511 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 17:37:49,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:37:49,029 INFO L93 Difference]: Finished difference Result 1072 states and 1579 transitions. [2022-07-19 17:37:49,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 17:37:49,030 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 67 [2022-07-19 17:37:49,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:37:49,033 INFO L225 Difference]: With dead ends: 1072 [2022-07-19 17:37:49,033 INFO L226 Difference]: Without dead ends: 730 [2022-07-19 17:37:49,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-19 17:37:49,036 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 425 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 17:37:49,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [434 Valid, 624 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 766 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 17:37:49,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2022-07-19 17:37:49,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 571. [2022-07-19 17:37:49,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 476 states have (on average 1.4600840336134453) internal successors, (695), 481 states have internal predecessors, (695), 60 states have call successors, (60), 30 states have call predecessors, (60), 34 states have return successors, (73), 63 states have call predecessors, (73), 60 states have call successors, (73) [2022-07-19 17:37:49,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 828 transitions. [2022-07-19 17:37:49,065 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 828 transitions. Word has length 67 [2022-07-19 17:37:49,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:37:49,066 INFO L495 AbstractCegarLoop]: Abstraction has 571 states and 828 transitions. [2022-07-19 17:37:49,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 17:37:49,066 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 828 transitions. [2022-07-19 17:37:49,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-19 17:37:49,067 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:37:49,067 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:37:49,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 17:37:49,068 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:37:49,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:37:49,068 INFO L85 PathProgramCache]: Analyzing trace with hash -308126053, now seen corresponding path program 1 times [2022-07-19 17:37:49,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:37:49,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965783412] [2022-07-19 17:37:49,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:37:49,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:37:49,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:49,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:37:49,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:49,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-19 17:37:49,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:49,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 17:37:49,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:49,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 17:37:49,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:49,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-19 17:37:49,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:49,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 17:37:49,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:37:49,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965783412] [2022-07-19 17:37:49,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965783412] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:37:49,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:37:49,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 17:37:49,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245188119] [2022-07-19 17:37:49,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:37:49,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 17:37:49,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:37:49,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 17:37:49,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 17:37:49,147 INFO L87 Difference]: Start difference. First operand 571 states and 828 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 17:37:49,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:37:49,880 INFO L93 Difference]: Finished difference Result 1916 states and 2810 transitions. [2022-07-19 17:37:49,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 17:37:49,880 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 67 [2022-07-19 17:37:49,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:37:49,886 INFO L225 Difference]: With dead ends: 1916 [2022-07-19 17:37:49,887 INFO L226 Difference]: Without dead ends: 1355 [2022-07-19 17:37:49,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-19 17:37:49,889 INFO L413 NwaCegarLoop]: 296 mSDtfsCounter, 399 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 932 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 877 SdHoareTripleChecker+Invalid, 996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 17:37:49,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [407 Valid, 877 Invalid, 996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 932 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 17:37:49,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2022-07-19 17:37:49,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 983. [2022-07-19 17:37:49,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 983 states, 820 states have (on average 1.4573170731707317) internal successors, (1195), 829 states have internal predecessors, (1195), 100 states have call successors, (100), 54 states have call predecessors, (100), 62 states have return successors, (135), 107 states have call predecessors, (135), 100 states have call successors, (135) [2022-07-19 17:37:49,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 983 states to 983 states and 1430 transitions. [2022-07-19 17:37:49,929 INFO L78 Accepts]: Start accepts. Automaton has 983 states and 1430 transitions. Word has length 67 [2022-07-19 17:37:49,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:37:49,930 INFO L495 AbstractCegarLoop]: Abstraction has 983 states and 1430 transitions. [2022-07-19 17:37:49,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 17:37:49,930 INFO L276 IsEmpty]: Start isEmpty. Operand 983 states and 1430 transitions. [2022-07-19 17:37:49,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-19 17:37:49,931 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:37:49,931 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:37:49,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 17:37:49,932 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:37:49,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:37:49,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1958255133, now seen corresponding path program 1 times [2022-07-19 17:37:49,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:37:49,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481920753] [2022-07-19 17:37:49,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:37:49,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:37:49,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:49,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:37:49,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:49,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-19 17:37:49,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:49,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 17:37:49,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:49,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 17:37:49,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:49,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-19 17:37:50,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:50,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 17:37:50,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:37:50,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481920753] [2022-07-19 17:37:50,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481920753] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:37:50,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:37:50,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 17:37:50,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571647791] [2022-07-19 17:37:50,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:37:50,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 17:37:50,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:37:50,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 17:37:50,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 17:37:50,005 INFO L87 Difference]: Start difference. First operand 983 states and 1430 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 17:37:50,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:37:50,617 INFO L93 Difference]: Finished difference Result 3314 states and 4850 transitions. [2022-07-19 17:37:50,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 17:37:50,617 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 67 [2022-07-19 17:37:50,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:37:50,626 INFO L225 Difference]: With dead ends: 3314 [2022-07-19 17:37:50,627 INFO L226 Difference]: Without dead ends: 2341 [2022-07-19 17:37:50,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-19 17:37:50,631 INFO L413 NwaCegarLoop]: 265 mSDtfsCounter, 404 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 849 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 17:37:50,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [416 Valid, 849 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 823 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 17:37:50,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2341 states. [2022-07-19 17:37:50,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2341 to 1820. [2022-07-19 17:37:50,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1820 states, 1525 states have (on average 1.459016393442623) internal successors, (2225), 1542 states have internal predecessors, (2225), 176 states have call successors, (176), 102 states have call predecessors, (176), 118 states have return successors, (273), 191 states have call predecessors, (273), 176 states have call successors, (273) [2022-07-19 17:37:50,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1820 states to 1820 states and 2674 transitions. [2022-07-19 17:37:50,719 INFO L78 Accepts]: Start accepts. Automaton has 1820 states and 2674 transitions. Word has length 67 [2022-07-19 17:37:50,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:37:50,720 INFO L495 AbstractCegarLoop]: Abstraction has 1820 states and 2674 transitions. [2022-07-19 17:37:50,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 17:37:50,720 INFO L276 IsEmpty]: Start isEmpty. Operand 1820 states and 2674 transitions. [2022-07-19 17:37:50,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-19 17:37:50,722 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:37:50,722 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:37:50,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 17:37:50,722 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:37:50,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:37:50,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1477174875, now seen corresponding path program 1 times [2022-07-19 17:37:50,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:37:50,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896827531] [2022-07-19 17:37:50,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:37:50,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:37:50,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:50,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:37:50,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:50,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-19 17:37:50,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:50,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 17:37:50,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:50,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 17:37:50,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:50,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-19 17:37:50,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:50,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 17:37:50,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:37:50,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896827531] [2022-07-19 17:37:50,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896827531] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:37:50,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:37:50,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 17:37:50,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226951312] [2022-07-19 17:37:50,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:37:50,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 17:37:50,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:37:50,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 17:37:50,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 17:37:50,777 INFO L87 Difference]: Start difference. First operand 1820 states and 2674 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 17:37:51,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:37:51,326 INFO L93 Difference]: Finished difference Result 5157 states and 7617 transitions. [2022-07-19 17:37:51,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 17:37:51,327 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 67 [2022-07-19 17:37:51,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:37:51,342 INFO L225 Difference]: With dead ends: 5157 [2022-07-19 17:37:51,344 INFO L226 Difference]: Without dead ends: 3348 [2022-07-19 17:37:51,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-07-19 17:37:51,354 INFO L413 NwaCegarLoop]: 341 mSDtfsCounter, 527 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 552 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 17:37:51,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [552 Valid, 707 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 17:37:51,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3348 states. [2022-07-19 17:37:51,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3348 to 2761. [2022-07-19 17:37:51,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2761 states, 2308 states have (on average 1.441941074523397) internal successors, (3328), 2342 states have internal predecessors, (3328), 272 states have call successors, (272), 156 states have call predecessors, (272), 180 states have return successors, (397), 278 states have call predecessors, (397), 272 states have call successors, (397) [2022-07-19 17:37:51,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2761 states to 2761 states and 3997 transitions. [2022-07-19 17:37:51,466 INFO L78 Accepts]: Start accepts. Automaton has 2761 states and 3997 transitions. Word has length 67 [2022-07-19 17:37:51,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:37:51,467 INFO L495 AbstractCegarLoop]: Abstraction has 2761 states and 3997 transitions. [2022-07-19 17:37:51,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 17:37:51,467 INFO L276 IsEmpty]: Start isEmpty. Operand 2761 states and 3997 transitions. [2022-07-19 17:37:51,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-07-19 17:37:51,473 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:37:51,473 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-19 17:37:51,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 17:37:51,474 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:37:51,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:37:51,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1191841586, now seen corresponding path program 1 times [2022-07-19 17:37:51,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:37:51,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362506718] [2022-07-19 17:37:51,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:37:51,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:37:51,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:51,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:37:51,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:51,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-19 17:37:51,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:51,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 17:37:51,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:51,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 17:37:51,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:51,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-19 17:37:51,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:51,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-19 17:37:51,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:51,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 17:37:51,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:51,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-19 17:37:51,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:51,599 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-19 17:37:51,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:37:51,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362506718] [2022-07-19 17:37:51,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362506718] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:37:51,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286695666] [2022-07-19 17:37:51,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:37:51,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:37:51,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:37:51,602 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) [2022-07-19 17:37:51,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 17:37:51,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:51,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 17:37:51,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:37:51,753 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-19 17:37:51,754 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 17:37:51,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286695666] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:37:51,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 17:37:51,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-07-19 17:37:51,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110902025] [2022-07-19 17:37:51,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:37:51,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 17:37:51,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:37:51,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 17:37:51,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 17:37:51,756 INFO L87 Difference]: Start difference. First operand 2761 states and 3997 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-19 17:37:51,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:37:51,946 INFO L93 Difference]: Finished difference Result 8118 states and 11831 transitions. [2022-07-19 17:37:51,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 17:37:51,946 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 109 [2022-07-19 17:37:51,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:37:51,963 INFO L225 Difference]: With dead ends: 8118 [2022-07-19 17:37:51,964 INFO L226 Difference]: Without dead ends: 5368 [2022-07-19 17:37:51,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 17:37:51,970 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 140 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:37:51,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 350 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:37:51,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5368 states. [2022-07-19 17:37:52,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5368 to 5314. [2022-07-19 17:37:52,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5314 states, 4447 states have (on average 1.440746570721835) internal successors, (6407), 4514 states have internal predecessors, (6407), 510 states have call successors, (510), 308 states have call predecessors, (510), 356 states have return successors, (745), 507 states have call predecessors, (745), 510 states have call successors, (745) [2022-07-19 17:37:52,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5314 states to 5314 states and 7662 transitions. [2022-07-19 17:37:52,174 INFO L78 Accepts]: Start accepts. Automaton has 5314 states and 7662 transitions. Word has length 109 [2022-07-19 17:37:52,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:37:52,175 INFO L495 AbstractCegarLoop]: Abstraction has 5314 states and 7662 transitions. [2022-07-19 17:37:52,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-19 17:37:52,175 INFO L276 IsEmpty]: Start isEmpty. Operand 5314 states and 7662 transitions. [2022-07-19 17:37:52,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-07-19 17:37:52,182 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:37:52,183 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-19 17:37:52,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 17:37:52,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:37:52,400 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:37:52,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:37:52,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1024502098, now seen corresponding path program 1 times [2022-07-19 17:37:52,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:37:52,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968055143] [2022-07-19 17:37:52,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:37:52,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:37:52,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:52,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:37:52,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:52,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-19 17:37:52,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:52,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 17:37:52,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:52,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 17:37:52,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:52,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-19 17:37:52,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:52,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-19 17:37:52,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:52,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 17:37:52,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:52,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-19 17:37:52,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:52,474 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-19 17:37:52,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:37:52,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968055143] [2022-07-19 17:37:52,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968055143] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:37:52,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100608689] [2022-07-19 17:37:52,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:37:52,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:37:52,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:37:52,476 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 17:37:52,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 17:37:52,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:52,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 17:37:52,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:37:52,581 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-19 17:37:52,581 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 17:37:52,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100608689] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:37:52,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 17:37:52,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-19 17:37:52,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973234354] [2022-07-19 17:37:52,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:37:52,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 17:37:52,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:37:52,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 17:37:52,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 17:37:52,584 INFO L87 Difference]: Start difference. First operand 5314 states and 7662 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-19 17:37:52,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:37:52,779 INFO L93 Difference]: Finished difference Result 8992 states and 13074 transitions. [2022-07-19 17:37:52,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 17:37:52,780 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 109 [2022-07-19 17:37:52,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:37:52,812 INFO L225 Difference]: With dead ends: 8992 [2022-07-19 17:37:52,812 INFO L226 Difference]: Without dead ends: 7065 [2022-07-19 17:37:52,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 17:37:52,819 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 143 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:37:52,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 511 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:37:52,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7065 states. [2022-07-19 17:37:53,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7065 to 7065. [2022-07-19 17:37:53,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7065 states, 5917 states have (on average 1.4402568869359473) internal successors, (8522), 6000 states have internal predecessors, (8522), 671 states have call successors, (671), 412 states have call predecessors, (671), 476 states have return successors, (1015), 668 states have call predecessors, (1015), 671 states have call successors, (1015) [2022-07-19 17:37:53,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7065 states to 7065 states and 10208 transitions. [2022-07-19 17:37:53,096 INFO L78 Accepts]: Start accepts. Automaton has 7065 states and 10208 transitions. Word has length 109 [2022-07-19 17:37:53,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:37:53,096 INFO L495 AbstractCegarLoop]: Abstraction has 7065 states and 10208 transitions. [2022-07-19 17:37:53,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-19 17:37:53,096 INFO L276 IsEmpty]: Start isEmpty. Operand 7065 states and 10208 transitions. [2022-07-19 17:37:53,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-07-19 17:37:53,108 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:37:53,108 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:37:53,141 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-19 17:37:53,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-19 17:37:53,344 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:37:53,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:37:53,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1008937151, now seen corresponding path program 1 times [2022-07-19 17:37:53,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:37:53,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616665923] [2022-07-19 17:37:53,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:37:53,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:37:53,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:53,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:37:53,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:53,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-19 17:37:53,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:53,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 17:37:53,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:53,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 17:37:53,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:53,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-19 17:37:53,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:53,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-19 17:37:53,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:53,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 17:37:53,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:53,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-07-19 17:37:53,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:53,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 17:37:53,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:53,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-19 17:37:53,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:53,423 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-19 17:37:53,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:37:53,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616665923] [2022-07-19 17:37:53,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616665923] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:37:53,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433391493] [2022-07-19 17:37:53,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:37:53,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:37:53,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:37:53,440 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 17:37:53,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 17:37:53,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:53,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 17:37:53,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:37:53,612 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-19 17:37:53,612 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 17:37:53,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433391493] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:37:53,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 17:37:53,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-07-19 17:37:53,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781818411] [2022-07-19 17:37:53,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:37:53,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 17:37:53,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:37:53,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 17:37:53,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 17:37:53,614 INFO L87 Difference]: Start difference. First operand 7065 states and 10208 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-07-19 17:37:53,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:37:53,972 INFO L93 Difference]: Finished difference Result 20891 states and 30410 transitions. [2022-07-19 17:37:53,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 17:37:53,974 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 141 [2022-07-19 17:37:53,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:37:54,027 INFO L225 Difference]: With dead ends: 20891 [2022-07-19 17:37:54,028 INFO L226 Difference]: Without dead ends: 13837 [2022-07-19 17:37:54,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 17:37:54,049 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 98 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:37:54,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 359 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:37:54,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13837 states. [2022-07-19 17:37:54,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13837 to 13695. [2022-07-19 17:37:54,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13695 states, 11460 states have (on average 1.4361256544502619) internal successors, (16458), 11625 states have internal predecessors, (16458), 1291 states have call successors, (1291), 815 states have call predecessors, (1291), 943 states have return successors, (1949), 1270 states have call predecessors, (1949), 1291 states have call successors, (1949) [2022-07-19 17:37:54,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13695 states to 13695 states and 19698 transitions. [2022-07-19 17:37:54,558 INFO L78 Accepts]: Start accepts. Automaton has 13695 states and 19698 transitions. Word has length 141 [2022-07-19 17:37:54,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:37:54,559 INFO L495 AbstractCegarLoop]: Abstraction has 13695 states and 19698 transitions. [2022-07-19 17:37:54,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-07-19 17:37:54,559 INFO L276 IsEmpty]: Start isEmpty. Operand 13695 states and 19698 transitions. [2022-07-19 17:37:54,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-07-19 17:37:54,587 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:37:54,587 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:37:54,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 17:37:54,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:37:54,799 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:37:54,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:37:54,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1723827082, now seen corresponding path program 1 times [2022-07-19 17:37:54,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:37:54,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904795306] [2022-07-19 17:37:54,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:37:54,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:37:54,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:54,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:37:54,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:54,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-19 17:37:54,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:54,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 17:37:54,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:54,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 17:37:54,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:54,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-19 17:37:54,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:54,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-19 17:37:54,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:54,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-19 17:37:54,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:54,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 17:37:54,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:54,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-19 17:37:54,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:54,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 17:37:54,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:54,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-07-19 17:37:54,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:54,871 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-19 17:37:54,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:37:54,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904795306] [2022-07-19 17:37:54,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904795306] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:37:54,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726487865] [2022-07-19 17:37:54,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:37:54,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:37:54,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:37:54,874 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 17:37:54,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 17:37:54,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:54,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 17:37:54,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:37:55,104 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-19 17:37:55,105 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 17:37:55,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726487865] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:37:55,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 17:37:55,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-19 17:37:55,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686613318] [2022-07-19 17:37:55,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:37:55,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 17:37:55,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:37:55,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 17:37:55,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 17:37:55,107 INFO L87 Difference]: Start difference. First operand 13695 states and 19698 transitions. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-19 17:37:55,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:37:55,599 INFO L93 Difference]: Finished difference Result 29008 states and 42364 transitions. [2022-07-19 17:37:55,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 17:37:55,600 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 158 [2022-07-19 17:37:55,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:37:55,644 INFO L225 Difference]: With dead ends: 29008 [2022-07-19 17:37:55,644 INFO L226 Difference]: Without dead ends: 15323 [2022-07-19 17:37:55,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 17:37:55,676 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 116 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:37:55,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 212 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:37:55,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15323 states. [2022-07-19 17:37:56,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15323 to 15323. [2022-07-19 17:37:56,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15323 states, 12928 states have (on average 1.3779393564356435) internal successors, (17814), 13093 states have internal predecessors, (17814), 1336 states have call successors, (1336), 930 states have call predecessors, (1336), 1058 states have return successors, (1999), 1315 states have call predecessors, (1999), 1336 states have call successors, (1999) [2022-07-19 17:37:56,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15323 states to 15323 states and 21149 transitions. [2022-07-19 17:37:56,324 INFO L78 Accepts]: Start accepts. Automaton has 15323 states and 21149 transitions. Word has length 158 [2022-07-19 17:37:56,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:37:56,324 INFO L495 AbstractCegarLoop]: Abstraction has 15323 states and 21149 transitions. [2022-07-19 17:37:56,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-19 17:37:56,325 INFO L276 IsEmpty]: Start isEmpty. Operand 15323 states and 21149 transitions. [2022-07-19 17:37:56,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-07-19 17:37:56,351 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:37:56,352 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:37:56,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 17:37:56,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:37:56,572 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:37:56,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:37:56,573 INFO L85 PathProgramCache]: Analyzing trace with hash -481856839, now seen corresponding path program 1 times [2022-07-19 17:37:56,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:37:56,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984478250] [2022-07-19 17:37:56,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:37:56,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:37:56,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:56,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:37:56,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:56,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-19 17:37:56,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:56,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 17:37:56,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:56,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 17:37:56,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:56,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-19 17:37:56,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:56,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-19 17:37:56,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:56,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-19 17:37:56,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:56,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 17:37:56,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:56,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-19 17:37:56,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:56,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 17:37:56,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:56,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-07-19 17:37:56,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:56,649 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-07-19 17:37:56,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:37:56,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984478250] [2022-07-19 17:37:56,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984478250] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:37:56,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515798580] [2022-07-19 17:37:56,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:37:56,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:37:56,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:37:56,651 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 17:37:56,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 17:37:56,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:56,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 17:37:56,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:37:56,761 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-19 17:37:56,761 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 17:37:56,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515798580] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:37:56,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 17:37:56,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-19 17:37:56,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105147819] [2022-07-19 17:37:56,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:37:56,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 17:37:56,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:37:56,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 17:37:56,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 17:37:56,764 INFO L87 Difference]: Start difference. First operand 15323 states and 21149 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-19 17:37:57,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:37:57,338 INFO L93 Difference]: Finished difference Result 32174 states and 44325 transitions. [2022-07-19 17:37:57,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 17:37:57,339 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 158 [2022-07-19 17:37:57,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:37:57,387 INFO L225 Difference]: With dead ends: 32174 [2022-07-19 17:37:57,387 INFO L226 Difference]: Without dead ends: 16863 [2022-07-19 17:37:57,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 17:37:57,419 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 130 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:37:57,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 350 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:37:57,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16863 states. [2022-07-19 17:37:58,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16863 to 16723. [2022-07-19 17:37:58,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16723 states, 14216 states have (on average 1.342290377039955) internal successors, (19082), 14381 states have internal predecessors, (19082), 1356 states have call successors, (1356), 1022 states have call predecessors, (1356), 1150 states have return successors, (2111), 1335 states have call predecessors, (2111), 1356 states have call successors, (2111) [2022-07-19 17:37:58,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16723 states to 16723 states and 22549 transitions. [2022-07-19 17:37:58,124 INFO L78 Accepts]: Start accepts. Automaton has 16723 states and 22549 transitions. Word has length 158 [2022-07-19 17:37:58,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:37:58,125 INFO L495 AbstractCegarLoop]: Abstraction has 16723 states and 22549 transitions. [2022-07-19 17:37:58,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-19 17:37:58,126 INFO L276 IsEmpty]: Start isEmpty. Operand 16723 states and 22549 transitions. [2022-07-19 17:37:58,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-07-19 17:37:58,168 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:37:58,169 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:37:58,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 17:37:58,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-19 17:37:58,386 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:37:58,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:37:58,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1737479545, now seen corresponding path program 1 times [2022-07-19 17:37:58,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:37:58,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864735967] [2022-07-19 17:37:58,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:37:58,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:37:58,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:58,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:37:58,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:58,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-19 17:37:58,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:58,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 17:37:58,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:58,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 17:37:58,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:58,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-19 17:37:58,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:58,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-19 17:37:58,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:58,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-07-19 17:37:58,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:58,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 17:37:58,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:58,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-07-19 17:37:58,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:58,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 17:37:58,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:58,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-07-19 17:37:58,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:58,478 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-07-19 17:37:58,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:37:58,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864735967] [2022-07-19 17:37:58,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864735967] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:37:58,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164350978] [2022-07-19 17:37:58,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:37:58,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:37:58,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:37:58,480 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 17:37:58,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 17:37:58,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:58,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 17:37:58,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:37:58,604 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-19 17:37:58,605 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 17:37:58,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164350978] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:37:58,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 17:37:58,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-19 17:37:58,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862794308] [2022-07-19 17:37:58,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:37:58,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 17:37:58,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:37:58,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 17:37:58,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 17:37:58,607 INFO L87 Difference]: Start difference. First operand 16723 states and 22549 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-19 17:37:59,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:37:59,556 INFO L93 Difference]: Finished difference Result 48048 states and 65401 transitions. [2022-07-19 17:37:59,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 17:37:59,557 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 159 [2022-07-19 17:37:59,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:37:59,665 INFO L225 Difference]: With dead ends: 48048 [2022-07-19 17:37:59,665 INFO L226 Difference]: Without dead ends: 31337 [2022-07-19 17:37:59,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 17:37:59,697 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 142 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:37:59,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 380 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:37:59,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31337 states. [2022-07-19 17:38:00,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31337 to 30845. [2022-07-19 17:38:00,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30845 states, 26113 states have (on average 1.333626929115766) internal successors, (34825), 26443 states have internal predecessors, (34825), 2571 states have call successors, (2571), 1904 states have call predecessors, (2571), 2160 states have return successors, (4678), 2529 states have call predecessors, (4678), 2571 states have call successors, (4678) [2022-07-19 17:38:00,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30845 states to 30845 states and 42074 transitions. [2022-07-19 17:38:00,917 INFO L78 Accepts]: Start accepts. Automaton has 30845 states and 42074 transitions. Word has length 159 [2022-07-19 17:38:00,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:38:00,918 INFO L495 AbstractCegarLoop]: Abstraction has 30845 states and 42074 transitions. [2022-07-19 17:38:00,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-19 17:38:00,918 INFO L276 IsEmpty]: Start isEmpty. Operand 30845 states and 42074 transitions. [2022-07-19 17:38:00,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-07-19 17:38:00,958 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:38:00,959 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:38:00,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 17:38:01,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:38:01,176 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:38:01,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:38:01,176 INFO L85 PathProgramCache]: Analyzing trace with hash 2130014702, now seen corresponding path program 1 times [2022-07-19 17:38:01,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:38:01,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635681470] [2022-07-19 17:38:01,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:38:01,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:38:01,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:01,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:38:01,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:01,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-19 17:38:01,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:01,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 17:38:01,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:01,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 17:38:01,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:01,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-19 17:38:01,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:01,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-19 17:38:01,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:01,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-07-19 17:38:01,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:01,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 17:38:01,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:01,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-07-19 17:38:01,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:01,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 17:38:01,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:01,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-07-19 17:38:01,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:01,257 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-07-19 17:38:01,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:38:01,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635681470] [2022-07-19 17:38:01,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635681470] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:38:01,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893280734] [2022-07-19 17:38:01,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:38:01,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:38:01,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:38:01,259 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 17:38:01,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 17:38:01,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:01,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 17:38:01,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:38:01,391 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-19 17:38:01,392 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 17:38:01,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893280734] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:38:01,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 17:38:01,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-19 17:38:01,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202690185] [2022-07-19 17:38:01,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:38:01,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 17:38:01,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:38:01,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 17:38:01,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 17:38:01,394 INFO L87 Difference]: Start difference. First operand 30845 states and 42074 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-19 17:38:02,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:38:02,232 INFO L93 Difference]: Finished difference Result 51820 states and 71648 transitions. [2022-07-19 17:38:02,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 17:38:02,233 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 159 [2022-07-19 17:38:02,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:38:02,313 INFO L225 Difference]: With dead ends: 51820 [2022-07-19 17:38:02,314 INFO L226 Difference]: Without dead ends: 27303 [2022-07-19 17:38:02,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 17:38:02,355 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 130 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:38:02,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 210 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:38:02,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27303 states. [2022-07-19 17:38:03,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27303 to 19855. [2022-07-19 17:38:03,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19855 states, 16907 states have (on average 1.2918909327497485) internal successors, (21842), 17081 states have internal predecessors, (21842), 1589 states have call successors, (1589), 1230 states have call predecessors, (1589), 1358 states have return successors, (2580), 1559 states have call predecessors, (2580), 1589 states have call successors, (2580) [2022-07-19 17:38:03,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19855 states to 19855 states and 26011 transitions. [2022-07-19 17:38:03,356 INFO L78 Accepts]: Start accepts. Automaton has 19855 states and 26011 transitions. Word has length 159 [2022-07-19 17:38:03,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:38:03,356 INFO L495 AbstractCegarLoop]: Abstraction has 19855 states and 26011 transitions. [2022-07-19 17:38:03,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-19 17:38:03,357 INFO L276 IsEmpty]: Start isEmpty. Operand 19855 states and 26011 transitions. [2022-07-19 17:38:03,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-07-19 17:38:03,379 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:38:03,379 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:38:03,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 17:38:03,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:38:03,599 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:38:03,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:38:03,599 INFO L85 PathProgramCache]: Analyzing trace with hash 386447850, now seen corresponding path program 1 times [2022-07-19 17:38:03,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:38:03,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568738967] [2022-07-19 17:38:03,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:38:03,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:38:03,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:03,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:38:03,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:03,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-19 17:38:03,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:03,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 17:38:03,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:03,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 17:38:03,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:03,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-19 17:38:03,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:03,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-19 17:38:03,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:03,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-07-19 17:38:03,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:03,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 17:38:03,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:03,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-07-19 17:38:03,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:03,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 17:38:03,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:03,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-07-19 17:38:03,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:03,678 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-07-19 17:38:03,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:38:03,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568738967] [2022-07-19 17:38:03,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568738967] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:38:03,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96307255] [2022-07-19 17:38:03,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:38:03,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:38:03,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:38:03,680 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 17:38:03,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 17:38:03,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:03,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 17:38:03,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:38:03,793 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-19 17:38:03,793 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 17:38:03,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96307255] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:38:03,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 17:38:03,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-19 17:38:03,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95559250] [2022-07-19 17:38:03,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:38:03,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 17:38:03,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:38:03,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 17:38:03,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 17:38:03,795 INFO L87 Difference]: Start difference. First operand 19855 states and 26011 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-19 17:38:05,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:38:05,181 INFO L93 Difference]: Finished difference Result 57698 states and 76509 transitions. [2022-07-19 17:38:05,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 17:38:05,181 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 159 [2022-07-19 17:38:05,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:38:05,307 INFO L225 Difference]: With dead ends: 57698 [2022-07-19 17:38:05,308 INFO L226 Difference]: Without dead ends: 37859 [2022-07-19 17:38:05,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 17:38:05,359 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 138 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:38:05,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 384 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:38:05,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37859 states. [2022-07-19 17:38:06,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37859 to 36831. [2022-07-19 17:38:06,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36831 states, 31241 states have (on average 1.2801126724496654) internal successors, (39992), 31589 states have internal predecessors, (39992), 3025 states have call successors, (3025), 2308 states have call predecessors, (3025), 2564 states have return successors, (5800), 2965 states have call predecessors, (5800), 3025 states have call successors, (5800) [2022-07-19 17:38:06,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36831 states to 36831 states and 48817 transitions. [2022-07-19 17:38:06,943 INFO L78 Accepts]: Start accepts. Automaton has 36831 states and 48817 transitions. Word has length 159 [2022-07-19 17:38:06,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:38:06,944 INFO L495 AbstractCegarLoop]: Abstraction has 36831 states and 48817 transitions. [2022-07-19 17:38:06,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-19 17:38:06,944 INFO L276 IsEmpty]: Start isEmpty. Operand 36831 states and 48817 transitions. [2022-07-19 17:38:06,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-07-19 17:38:06,986 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:38:06,986 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:38:07,003 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-19 17:38:07,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-19 17:38:07,199 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:38:07,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:38:07,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1954938935, now seen corresponding path program 1 times [2022-07-19 17:38:07,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:38:07,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974403968] [2022-07-19 17:38:07,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:38:07,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:38:07,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:07,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:38:07,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:07,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-19 17:38:07,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:07,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 17:38:07,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:07,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 17:38:07,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:07,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-19 17:38:07,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:07,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-19 17:38:07,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:07,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-07-19 17:38:07,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:07,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 17:38:07,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:07,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-07-19 17:38:07,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:07,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 17:38:07,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:07,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-07-19 17:38:07,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:07,265 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-07-19 17:38:07,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:38:07,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974403968] [2022-07-19 17:38:07,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974403968] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:38:07,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:38:07,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 17:38:07,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648412174] [2022-07-19 17:38:07,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:38:07,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 17:38:07,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:38:07,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 17:38:07,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 17:38:07,268 INFO L87 Difference]: Start difference. First operand 36831 states and 48817 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-19 17:38:08,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:38:08,936 INFO L93 Difference]: Finished difference Result 72910 states and 95695 transitions. [2022-07-19 17:38:08,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 17:38:08,937 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 159 [2022-07-19 17:38:08,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:38:09,042 INFO L225 Difference]: With dead ends: 72910 [2022-07-19 17:38:09,042 INFO L226 Difference]: Without dead ends: 36094 [2022-07-19 17:38:09,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-19 17:38:09,108 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 281 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 17:38:09,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 303 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 17:38:09,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36094 states. [2022-07-19 17:38:10,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36094 to 33356. [2022-07-19 17:38:10,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33356 states, 28538 states have (on average 1.2772443759198262) internal successors, (36450), 29175 states have internal predecessors, (36450), 2307 states have call successors, (2307), 1772 states have call predecessors, (2307), 2510 states have return successors, (4765), 2424 states have call predecessors, (4765), 2307 states have call successors, (4765) [2022-07-19 17:38:10,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33356 states to 33356 states and 43522 transitions. [2022-07-19 17:38:10,917 INFO L78 Accepts]: Start accepts. Automaton has 33356 states and 43522 transitions. Word has length 159 [2022-07-19 17:38:10,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:38:10,918 INFO L495 AbstractCegarLoop]: Abstraction has 33356 states and 43522 transitions. [2022-07-19 17:38:10,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-19 17:38:10,918 INFO L276 IsEmpty]: Start isEmpty. Operand 33356 states and 43522 transitions. [2022-07-19 17:38:10,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-07-19 17:38:10,954 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:38:10,954 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:38:10,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-19 17:38:10,954 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:38:10,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:38:10,955 INFO L85 PathProgramCache]: Analyzing trace with hash 2077795372, now seen corresponding path program 1 times [2022-07-19 17:38:10,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:38:10,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757342847] [2022-07-19 17:38:10,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:38:10,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:38:10,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:10,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:38:10,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:10,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-19 17:38:10,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:10,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 17:38:10,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:10,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 17:38:10,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:10,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-19 17:38:10,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:10,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-19 17:38:10,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:10,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-07-19 17:38:10,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:10,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 17:38:10,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:10,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-07-19 17:38:10,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:10,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 17:38:10,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:10,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-07-19 17:38:10,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:10,996 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-07-19 17:38:10,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:38:10,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757342847] [2022-07-19 17:38:10,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757342847] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:38:10,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:38:10,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 17:38:10,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986104168] [2022-07-19 17:38:10,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:38:10,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 17:38:10,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:38:10,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 17:38:10,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 17:38:10,998 INFO L87 Difference]: Start difference. First operand 33356 states and 43522 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-19 17:38:12,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:38:12,446 INFO L93 Difference]: Finished difference Result 60854 states and 79171 transitions. [2022-07-19 17:38:12,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 17:38:12,447 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 159 [2022-07-19 17:38:12,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:38:12,534 INFO L225 Difference]: With dead ends: 60854 [2022-07-19 17:38:12,535 INFO L226 Difference]: Without dead ends: 27509 [2022-07-19 17:38:12,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-19 17:38:12,585 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 281 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 17:38:12,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 301 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 17:38:12,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27509 states. [2022-07-19 17:38:13,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27509 to 24900. [2022-07-19 17:38:13,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24900 states, 21348 states have (on average 1.2856005246393105) internal successors, (27445), 21794 states have internal predecessors, (27445), 1717 states have call successors, (1717), 1326 states have call predecessors, (1717), 1834 states have return successors, (3303), 1787 states have call predecessors, (3303), 1717 states have call successors, (3303) [2022-07-19 17:38:13,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24900 states to 24900 states and 32465 transitions. [2022-07-19 17:38:13,873 INFO L78 Accepts]: Start accepts. Automaton has 24900 states and 32465 transitions. Word has length 159 [2022-07-19 17:38:13,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:38:13,873 INFO L495 AbstractCegarLoop]: Abstraction has 24900 states and 32465 transitions. [2022-07-19 17:38:13,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-19 17:38:13,874 INFO L276 IsEmpty]: Start isEmpty. Operand 24900 states and 32465 transitions. [2022-07-19 17:38:13,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-07-19 17:38:13,899 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:38:13,900 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:38:13,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-19 17:38:13,900 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:38:13,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:38:13,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1097089037, now seen corresponding path program 1 times [2022-07-19 17:38:13,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:38:13,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682680721] [2022-07-19 17:38:13,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:38:13,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:38:13,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:13,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:38:13,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:13,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-19 17:38:13,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:13,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 17:38:13,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:13,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 17:38:13,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:13,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-19 17:38:13,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:13,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-07-19 17:38:13,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:13,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-07-19 17:38:13,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:13,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 17:38:13,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:13,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-07-19 17:38:13,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:13,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 17:38:13,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:13,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2022-07-19 17:38:13,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:13,964 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-07-19 17:38:13,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:38:13,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682680721] [2022-07-19 17:38:13,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682680721] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:38:13,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629079113] [2022-07-19 17:38:13,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:38:13,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:38:13,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:38:13,966 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 17:38:13,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 17:38:14,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:14,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 17:38:14,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:38:14,076 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-19 17:38:14,077 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 17:38:14,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629079113] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:38:14,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 17:38:14,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-19 17:38:14,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779766320] [2022-07-19 17:38:14,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:38:14,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 17:38:14,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:38:14,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 17:38:14,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 17:38:14,078 INFO L87 Difference]: Start difference. First operand 24900 states and 32465 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-07-19 17:38:15,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:38:15,183 INFO L93 Difference]: Finished difference Result 41871 states and 56180 transitions. [2022-07-19 17:38:15,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 17:38:15,183 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 161 [2022-07-19 17:38:15,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:38:15,243 INFO L225 Difference]: With dead ends: 41871 [2022-07-19 17:38:15,243 INFO L226 Difference]: Without dead ends: 25016 [2022-07-19 17:38:15,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 17:38:15,269 INFO L413 NwaCegarLoop]: 308 mSDtfsCounter, 130 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:38:15,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 464 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:38:15,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25016 states. [2022-07-19 17:38:16,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25016 to 24900. [2022-07-19 17:38:16,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24900 states, 21348 states have (on average 1.2620854412591342) internal successors, (26943), 21794 states have internal predecessors, (26943), 1717 states have call successors, (1717), 1326 states have call predecessors, (1717), 1834 states have return successors, (3303), 1787 states have call predecessors, (3303), 1717 states have call successors, (3303) [2022-07-19 17:38:16,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24900 states to 24900 states and 31963 transitions. [2022-07-19 17:38:16,369 INFO L78 Accepts]: Start accepts. Automaton has 24900 states and 31963 transitions. Word has length 161 [2022-07-19 17:38:16,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:38:16,369 INFO L495 AbstractCegarLoop]: Abstraction has 24900 states and 31963 transitions. [2022-07-19 17:38:16,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-07-19 17:38:16,369 INFO L276 IsEmpty]: Start isEmpty. Operand 24900 states and 31963 transitions. [2022-07-19 17:38:16,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-07-19 17:38:16,393 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:38:16,393 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:38:16,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-19 17:38:16,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-19 17:38:16,594 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:38:16,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:38:16,594 INFO L85 PathProgramCache]: Analyzing trace with hash 724411373, now seen corresponding path program 1 times [2022-07-19 17:38:16,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:38:16,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572281533] [2022-07-19 17:38:16,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:38:16,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:38:16,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:16,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:38:16,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:16,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-19 17:38:16,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:16,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 17:38:16,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:16,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 17:38:16,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:16,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-19 17:38:16,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:16,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-07-19 17:38:16,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:16,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-07-19 17:38:16,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:16,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 17:38:16,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:16,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-07-19 17:38:16,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:16,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 17:38:16,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:16,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2022-07-19 17:38:16,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:16,656 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-07-19 17:38:16,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:38:16,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572281533] [2022-07-19 17:38:16,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572281533] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:38:16,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373820286] [2022-07-19 17:38:16,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:38:16,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:38:16,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:38:16,659 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 17:38:16,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-19 17:38:16,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:16,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 17:38:16,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:38:16,755 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-19 17:38:16,755 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 17:38:16,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373820286] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:38:16,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 17:38:16,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-19 17:38:16,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529772092] [2022-07-19 17:38:16,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:38:16,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 17:38:16,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:38:16,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 17:38:16,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 17:38:16,758 INFO L87 Difference]: Start difference. First operand 24900 states and 31963 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-19 17:38:17,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:38:17,856 INFO L93 Difference]: Finished difference Result 46579 states and 60834 transitions. [2022-07-19 17:38:17,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 17:38:17,859 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 161 [2022-07-19 17:38:17,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:38:17,919 INFO L225 Difference]: With dead ends: 46579 [2022-07-19 17:38:17,920 INFO L226 Difference]: Without dead ends: 22842 [2022-07-19 17:38:17,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 17:38:17,960 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 151 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:38:17,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 208 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:38:17,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22842 states. [2022-07-19 17:38:18,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22842 to 21577. [2022-07-19 17:38:18,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21577 states, 18547 states have (on average 1.2259125465034777) internal successors, (22737), 18913 states have internal predecessors, (22737), 1469 states have call successors, (1469), 1138 states have call predecessors, (1469), 1560 states have return successors, (2633), 1529 states have call predecessors, (2633), 1469 states have call successors, (2633) [2022-07-19 17:38:18,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21577 states to 21577 states and 26839 transitions. [2022-07-19 17:38:18,948 INFO L78 Accepts]: Start accepts. Automaton has 21577 states and 26839 transitions. Word has length 161 [2022-07-19 17:38:18,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:38:18,949 INFO L495 AbstractCegarLoop]: Abstraction has 21577 states and 26839 transitions. [2022-07-19 17:38:18,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-19 17:38:18,949 INFO L276 IsEmpty]: Start isEmpty. Operand 21577 states and 26839 transitions. [2022-07-19 17:38:18,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-07-19 17:38:18,966 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:38:18,966 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:38:18,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-19 17:38:19,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:38:19,179 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:38:19,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:38:19,180 INFO L85 PathProgramCache]: Analyzing trace with hash 308777324, now seen corresponding path program 1 times [2022-07-19 17:38:19,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:38:19,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268082681] [2022-07-19 17:38:19,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:38:19,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:38:19,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:19,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:38:19,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:19,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-19 17:38:19,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:19,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 17:38:19,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:19,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 17:38:19,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:19,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-19 17:38:19,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:19,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-07-19 17:38:19,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:19,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-07-19 17:38:19,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:19,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 17:38:19,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:19,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-07-19 17:38:19,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:19,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 17:38:19,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:19,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2022-07-19 17:38:19,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:19,244 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-07-19 17:38:19,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:38:19,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268082681] [2022-07-19 17:38:19,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268082681] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:38:19,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288562432] [2022-07-19 17:38:19,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:38:19,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:38:19,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:38:19,248 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 17:38:19,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-19 17:38:19,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:19,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 17:38:19,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:38:19,392 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-19 17:38:19,392 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 17:38:19,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288562432] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:38:19,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 17:38:19,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-19 17:38:19,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094773003] [2022-07-19 17:38:19,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:38:19,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 17:38:19,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:38:19,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 17:38:19,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 17:38:19,394 INFO L87 Difference]: Start difference. First operand 21577 states and 26839 transitions. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-07-19 17:38:20,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:38:20,294 INFO L93 Difference]: Finished difference Result 37035 states and 47315 transitions. [2022-07-19 17:38:20,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 17:38:20,295 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 161 [2022-07-19 17:38:20,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:38:20,344 INFO L225 Difference]: With dead ends: 37035 [2022-07-19 17:38:20,345 INFO L226 Difference]: Without dead ends: 21679 [2022-07-19 17:38:20,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 17:38:20,374 INFO L413 NwaCegarLoop]: 312 mSDtfsCounter, 123 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:38:20,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 467 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:38:20,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21679 states. [2022-07-19 17:38:21,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21679 to 21577. [2022-07-19 17:38:21,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21577 states, 18547 states have (on average 1.1985226721302638) internal successors, (22229), 18913 states have internal predecessors, (22229), 1469 states have call successors, (1469), 1138 states have call predecessors, (1469), 1560 states have return successors, (2633), 1529 states have call predecessors, (2633), 1469 states have call successors, (2633) [2022-07-19 17:38:21,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21577 states to 21577 states and 26331 transitions. [2022-07-19 17:38:21,357 INFO L78 Accepts]: Start accepts. Automaton has 21577 states and 26331 transitions. Word has length 161 [2022-07-19 17:38:21,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:38:21,358 INFO L495 AbstractCegarLoop]: Abstraction has 21577 states and 26331 transitions. [2022-07-19 17:38:21,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-07-19 17:38:21,358 INFO L276 IsEmpty]: Start isEmpty. Operand 21577 states and 26331 transitions. [2022-07-19 17:38:21,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-07-19 17:38:21,374 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:38:21,374 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:38:21,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-19 17:38:21,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:38:21,574 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:38:21,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:38:21,575 INFO L85 PathProgramCache]: Analyzing trace with hash -29438826, now seen corresponding path program 1 times [2022-07-19 17:38:21,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:38:21,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925732031] [2022-07-19 17:38:21,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:38:21,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:38:21,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:21,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:38:21,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:21,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-19 17:38:21,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:21,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 17:38:21,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:21,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 17:38:21,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:21,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-19 17:38:21,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:21,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-07-19 17:38:21,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:21,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-07-19 17:38:21,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:21,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 17:38:21,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:21,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-07-19 17:38:21,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:21,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 17:38:21,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:21,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-07-19 17:38:21,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:21,653 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-07-19 17:38:21,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:38:21,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925732031] [2022-07-19 17:38:21,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925732031] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:38:21,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249263490] [2022-07-19 17:38:21,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:38:21,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:38:21,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:38:21,655 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 17:38:21,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-19 17:38:21,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:21,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 17:38:21,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:38:21,748 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-19 17:38:21,748 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 17:38:21,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249263490] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:38:21,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 17:38:21,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-19 17:38:21,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961289809] [2022-07-19 17:38:21,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:38:21,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 17:38:21,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:38:21,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 17:38:21,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 17:38:21,750 INFO L87 Difference]: Start difference. First operand 21577 states and 26331 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-19 17:38:22,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:38:22,598 INFO L93 Difference]: Finished difference Result 35204 states and 44063 transitions. [2022-07-19 17:38:22,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 17:38:22,598 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 162 [2022-07-19 17:38:22,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:38:22,645 INFO L225 Difference]: With dead ends: 35204 [2022-07-19 17:38:22,646 INFO L226 Difference]: Without dead ends: 21625 [2022-07-19 17:38:22,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 17:38:22,674 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 144 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:38:22,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 435 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:38:22,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21625 states. [2022-07-19 17:38:23,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21625 to 21577. [2022-07-19 17:38:23,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21577 states, 18547 states have (on average 1.1848277349436567) internal successors, (21975), 18913 states have internal predecessors, (21975), 1469 states have call successors, (1469), 1138 states have call predecessors, (1469), 1560 states have return successors, (2633), 1529 states have call predecessors, (2633), 1469 states have call successors, (2633) [2022-07-19 17:38:23,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21577 states to 21577 states and 26077 transitions. [2022-07-19 17:38:23,645 INFO L78 Accepts]: Start accepts. Automaton has 21577 states and 26077 transitions. Word has length 162 [2022-07-19 17:38:23,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:38:23,646 INFO L495 AbstractCegarLoop]: Abstraction has 21577 states and 26077 transitions. [2022-07-19 17:38:23,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-19 17:38:23,646 INFO L276 IsEmpty]: Start isEmpty. Operand 21577 states and 26077 transitions. [2022-07-19 17:38:23,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-07-19 17:38:23,661 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:38:23,661 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:38:23,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-19 17:38:23,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-07-19 17:38:23,862 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:38:23,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:38:23,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1367110781, now seen corresponding path program 1 times [2022-07-19 17:38:23,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:38:23,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846191326] [2022-07-19 17:38:23,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:38:23,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:38:23,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:23,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:38:23,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:23,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-19 17:38:23,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:23,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 17:38:23,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:23,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 17:38:23,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:23,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-19 17:38:23,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:23,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-19 17:38:23,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:23,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 17:38:23,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:23,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-07-19 17:38:23,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:23,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-07-19 17:38:23,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:23,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 17:38:23,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:23,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-07-19 17:38:23,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:23,933 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-07-19 17:38:23,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:38:23,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846191326] [2022-07-19 17:38:23,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846191326] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:38:23,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264183957] [2022-07-19 17:38:23,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:38:23,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:38:23,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:38:23,935 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 17:38:23,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-19 17:38:23,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:23,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 17:38:23,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:38:24,008 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-19 17:38:24,008 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 17:38:24,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264183957] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:38:24,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 17:38:24,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-19 17:38:24,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379098317] [2022-07-19 17:38:24,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:38:24,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 17:38:24,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:38:24,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 17:38:24,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 17:38:24,010 INFO L87 Difference]: Start difference. First operand 21577 states and 26077 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-07-19 17:38:24,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:38:24,981 INFO L93 Difference]: Finished difference Result 36935 states and 44633 transitions. [2022-07-19 17:38:24,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 17:38:24,983 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 162 [2022-07-19 17:38:24,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:38:25,030 INFO L225 Difference]: With dead ends: 36935 [2022-07-19 17:38:25,030 INFO L226 Difference]: Without dead ends: 21579 [2022-07-19 17:38:25,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 17:38:25,055 INFO L413 NwaCegarLoop]: 308 mSDtfsCounter, 125 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:38:25,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 475 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:38:25,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21579 states. [2022-07-19 17:38:26,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21579 to 21577. [2022-07-19 17:38:26,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21577 states, 18547 states have (on average 1.1818622957890763) internal successors, (21920), 18913 states have internal predecessors, (21920), 1469 states have call successors, (1469), 1138 states have call predecessors, (1469), 1560 states have return successors, (2618), 1529 states have call predecessors, (2618), 1469 states have call successors, (2618) [2022-07-19 17:38:26,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21577 states to 21577 states and 26007 transitions. [2022-07-19 17:38:26,070 INFO L78 Accepts]: Start accepts. Automaton has 21577 states and 26007 transitions. Word has length 162 [2022-07-19 17:38:26,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:38:26,070 INFO L495 AbstractCegarLoop]: Abstraction has 21577 states and 26007 transitions. [2022-07-19 17:38:26,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-07-19 17:38:26,070 INFO L276 IsEmpty]: Start isEmpty. Operand 21577 states and 26007 transitions. [2022-07-19 17:38:26,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-07-19 17:38:26,085 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:38:26,085 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:38:26,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-19 17:38:26,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-19 17:38:26,286 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:38:26,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:38:26,287 INFO L85 PathProgramCache]: Analyzing trace with hash 646389301, now seen corresponding path program 1 times [2022-07-19 17:38:26,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:38:26,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176727197] [2022-07-19 17:38:26,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:38:26,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:38:26,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:26,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:38:26,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:26,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-19 17:38:26,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:26,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 17:38:26,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:26,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 17:38:26,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:26,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-19 17:38:26,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:26,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-07-19 17:38:26,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:26,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-07-19 17:38:26,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:26,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 17:38:26,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:26,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-07-19 17:38:26,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:26,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 17:38:26,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:26,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2022-07-19 17:38:26,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:26,350 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-07-19 17:38:26,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:38:26,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176727197] [2022-07-19 17:38:26,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176727197] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:38:26,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7109947] [2022-07-19 17:38:26,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:38:26,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:38:26,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:38:26,352 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 17:38:26,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-19 17:38:26,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:26,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-19 17:38:26,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:38:26,511 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-07-19 17:38:26,511 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 17:38:26,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7109947] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:38:26,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 17:38:26,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2022-07-19 17:38:26,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051865923] [2022-07-19 17:38:26,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:38:26,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 17:38:26,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:38:26,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 17:38:26,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-19 17:38:26,513 INFO L87 Difference]: Start difference. First operand 21577 states and 26007 transitions. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-19 17:38:27,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:38:27,384 INFO L93 Difference]: Finished difference Result 29740 states and 36096 transitions. [2022-07-19 17:38:27,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 17:38:27,384 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 163 [2022-07-19 17:38:27,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:38:27,418 INFO L225 Difference]: With dead ends: 29740 [2022-07-19 17:38:27,418 INFO L226 Difference]: Without dead ends: 15790 [2022-07-19 17:38:27,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-07-19 17:38:27,439 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 174 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 17:38:27,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 317 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 17:38:27,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15790 states. [2022-07-19 17:38:28,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15790 to 15730. [2022-07-19 17:38:28,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15730 states, 13536 states have (on average 1.164524231678487) internal successors, (15763), 13783 states have internal predecessors, (15763), 1075 states have call successors, (1075), 828 states have call predecessors, (1075), 1118 states have return successors, (1857), 1120 states have call predecessors, (1857), 1075 states have call successors, (1857) [2022-07-19 17:38:28,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15730 states to 15730 states and 18695 transitions. [2022-07-19 17:38:28,215 INFO L78 Accepts]: Start accepts. Automaton has 15730 states and 18695 transitions. Word has length 163 [2022-07-19 17:38:28,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:38:28,216 INFO L495 AbstractCegarLoop]: Abstraction has 15730 states and 18695 transitions. [2022-07-19 17:38:28,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-19 17:38:28,216 INFO L276 IsEmpty]: Start isEmpty. Operand 15730 states and 18695 transitions. [2022-07-19 17:38:28,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-07-19 17:38:28,223 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:38:28,223 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:38:28,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-19 17:38:28,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:38:28,424 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:38:28,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:38:28,424 INFO L85 PathProgramCache]: Analyzing trace with hash -446245901, now seen corresponding path program 1 times [2022-07-19 17:38:28,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:38:28,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642694833] [2022-07-19 17:38:28,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:38:28,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:38:28,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:28,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:38:28,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:28,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-19 17:38:28,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:28,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 17:38:28,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:28,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 17:38:28,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:28,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-19 17:38:28,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:28,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-07-19 17:38:28,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:28,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-07-19 17:38:28,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:28,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 17:38:28,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:28,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-07-19 17:38:28,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:28,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 17:38:28,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:28,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2022-07-19 17:38:28,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:28,490 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-07-19 17:38:28,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:38:28,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642694833] [2022-07-19 17:38:28,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642694833] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:38:28,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488536209] [2022-07-19 17:38:28,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:38:28,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:38:28,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:38:28,492 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 17:38:28,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-19 17:38:28,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:28,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-19 17:38:28,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:38:28,607 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-07-19 17:38:28,607 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 17:38:28,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488536209] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:38:28,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 17:38:28,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 7 [2022-07-19 17:38:28,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119043269] [2022-07-19 17:38:28,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:38:28,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 17:38:28,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:38:28,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 17:38:28,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 17:38:28,608 INFO L87 Difference]: Start difference. First operand 15730 states and 18695 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-19 17:38:29,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:38:29,288 INFO L93 Difference]: Finished difference Result 29497 states and 35579 transitions. [2022-07-19 17:38:29,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 17:38:29,288 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 163 [2022-07-19 17:38:29,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:38:29,319 INFO L225 Difference]: With dead ends: 29497 [2022-07-19 17:38:29,319 INFO L226 Difference]: Without dead ends: 13778 [2022-07-19 17:38:29,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 183 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-07-19 17:38:29,343 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 87 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:38:29,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 688 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:38:29,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13778 states. [2022-07-19 17:38:29,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13778 to 13206. [2022-07-19 17:38:29,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13206 states, 11261 states have (on average 1.142438504573306) internal successors, (12865), 11470 states have internal predecessors, (12865), 956 states have call successors, (956), 736 states have call predecessors, (956), 988 states have return successors, (1571), 1001 states have call predecessors, (1571), 956 states have call successors, (1571) [2022-07-19 17:38:30,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13206 states to 13206 states and 15392 transitions. [2022-07-19 17:38:30,019 INFO L78 Accepts]: Start accepts. Automaton has 13206 states and 15392 transitions. Word has length 163 [2022-07-19 17:38:30,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:38:30,019 INFO L495 AbstractCegarLoop]: Abstraction has 13206 states and 15392 transitions. [2022-07-19 17:38:30,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-19 17:38:30,019 INFO L276 IsEmpty]: Start isEmpty. Operand 13206 states and 15392 transitions. [2022-07-19 17:38:30,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-07-19 17:38:30,026 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:38:30,026 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:38:30,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-19 17:38:30,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:38:30,227 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:38:30,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:38:30,227 INFO L85 PathProgramCache]: Analyzing trace with hash 795348478, now seen corresponding path program 1 times [2022-07-19 17:38:30,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:38:30,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390898319] [2022-07-19 17:38:30,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:38:30,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:38:30,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:30,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:38:30,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:30,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-19 17:38:30,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:30,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 17:38:30,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:30,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 17:38:30,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:30,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-19 17:38:30,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:30,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-07-19 17:38:30,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:30,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-07-19 17:38:30,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:30,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 17:38:30,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:30,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-19 17:38:30,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:30,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 17:38:30,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:30,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2022-07-19 17:38:30,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:30,295 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-19 17:38:30,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:38:30,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390898319] [2022-07-19 17:38:30,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390898319] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:38:30,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299101588] [2022-07-19 17:38:30,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:38:30,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:38:30,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:38:30,298 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 17:38:30,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-19 17:38:30,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:30,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-19 17:38:30,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:38:30,396 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-07-19 17:38:30,396 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 17:38:30,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299101588] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:38:30,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 17:38:30,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 7 [2022-07-19 17:38:30,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933841433] [2022-07-19 17:38:30,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:38:30,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 17:38:30,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:38:30,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 17:38:30,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 17:38:30,398 INFO L87 Difference]: Start difference. First operand 13206 states and 15392 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-19 17:38:31,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:38:31,118 INFO L93 Difference]: Finished difference Result 26361 states and 31178 transitions. [2022-07-19 17:38:31,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 17:38:31,119 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 163 [2022-07-19 17:38:31,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:38:31,146 INFO L225 Difference]: With dead ends: 26361 [2022-07-19 17:38:31,146 INFO L226 Difference]: Without dead ends: 13166 [2022-07-19 17:38:31,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 183 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-07-19 17:38:31,166 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 49 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:38:31,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 678 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:38:31,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13166 states. [2022-07-19 17:38:31,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13166 to 12726. [2022-07-19 17:38:31,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12726 states, 10805 states have (on average 1.121795465062471) internal successors, (12121), 10998 states have internal predecessors, (12121), 956 states have call successors, (956), 736 states have call predecessors, (956), 964 states have return successors, (1459), 993 states have call predecessors, (1459), 956 states have call successors, (1459) [2022-07-19 17:38:31,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12726 states to 12726 states and 14536 transitions. [2022-07-19 17:38:31,786 INFO L78 Accepts]: Start accepts. Automaton has 12726 states and 14536 transitions. Word has length 163 [2022-07-19 17:38:31,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:38:31,786 INFO L495 AbstractCegarLoop]: Abstraction has 12726 states and 14536 transitions. [2022-07-19 17:38:31,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-19 17:38:31,787 INFO L276 IsEmpty]: Start isEmpty. Operand 12726 states and 14536 transitions. [2022-07-19 17:38:31,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-07-19 17:38:31,792 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:38:31,792 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:38:31,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-19 17:38:31,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-07-19 17:38:31,993 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:38:31,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:38:31,993 INFO L85 PathProgramCache]: Analyzing trace with hash -734104060, now seen corresponding path program 1 times [2022-07-19 17:38:31,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:38:31,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644425208] [2022-07-19 17:38:31,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:38:31,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:38:31,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:32,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:38:32,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:32,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-19 17:38:32,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:32,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 17:38:32,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:32,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 17:38:32,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:32,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-19 17:38:32,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:32,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-07-19 17:38:32,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:32,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-07-19 17:38:32,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:32,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 17:38:32,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:32,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-19 17:38:32,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:32,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 17:38:32,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:32,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2022-07-19 17:38:32,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:32,057 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-07-19 17:38:32,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:38:32,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644425208] [2022-07-19 17:38:32,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644425208] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:38:32,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475140075] [2022-07-19 17:38:32,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:38:32,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:38:32,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:38:32,059 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 17:38:32,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-19 17:38:32,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:32,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-19 17:38:32,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:38:32,146 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-07-19 17:38:32,147 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 17:38:32,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475140075] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:38:32,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 17:38:32,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 7 [2022-07-19 17:38:32,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601039807] [2022-07-19 17:38:32,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:38:32,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 17:38:32,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:38:32,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 17:38:32,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 17:38:32,149 INFO L87 Difference]: Start difference. First operand 12726 states and 14536 transitions. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-19 17:38:32,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:38:32,847 INFO L93 Difference]: Finished difference Result 23245 states and 26881 transitions. [2022-07-19 17:38:32,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 17:38:32,848 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 163 [2022-07-19 17:38:32,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:38:32,870 INFO L225 Difference]: With dead ends: 23245 [2022-07-19 17:38:32,870 INFO L226 Difference]: Without dead ends: 10530 [2022-07-19 17:38:32,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 183 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-07-19 17:38:32,888 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 10 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:38:32,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 663 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:38:32,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10530 states.