./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/960521-1-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version ae007674 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/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/memsafety/960521-1-3.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c10f64ae1701d633846cd3dbd537781b9e2aef0b0b5befdebbc22e76d228933b --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 05:48:12,497 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 05:48:12,499 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 05:48:12,535 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 05:48:12,535 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 05:48:12,536 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 05:48:12,537 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 05:48:12,539 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 05:48:12,540 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 05:48:12,541 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 05:48:12,542 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 05:48:12,543 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 05:48:12,543 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 05:48:12,544 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 05:48:12,545 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 05:48:12,546 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 05:48:12,546 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 05:48:12,547 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 05:48:12,549 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 05:48:12,550 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 05:48:12,551 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 05:48:12,552 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 05:48:12,553 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 05:48:12,554 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 05:48:12,556 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 05:48:12,557 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 05:48:12,557 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 05:48:12,558 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 05:48:12,558 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 05:48:12,559 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 05:48:12,559 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 05:48:12,560 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 05:48:12,561 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 05:48:12,561 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 05:48:12,562 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 05:48:12,563 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 05:48:12,563 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 05:48:12,564 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 05:48:12,564 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 05:48:12,565 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 05:48:12,565 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 05:48:12,567 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-28 05:48:12,600 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 05:48:12,600 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 05:48:12,601 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 05:48:12,601 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 05:48:12,602 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 05:48:12,602 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 05:48:12,602 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 05:48:12,602 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 05:48:12,603 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 05:48:12,603 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 05:48:12,603 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 05:48:12,603 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-28 05:48:12,603 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 05:48:12,603 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 05:48:12,604 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 05:48:12,604 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-28 05:48:12,604 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-28 05:48:12,604 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-28 05:48:12,604 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 05:48:12,605 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-28 05:48:12,605 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 05:48:12,605 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 05:48:12,605 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 05:48:12,605 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 05:48:12,606 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 05:48:12,606 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 05:48:12,606 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 05:48:12,606 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 05:48:12,606 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 05:48:12,606 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 05:48:12,607 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c10f64ae1701d633846cd3dbd537781b9e2aef0b0b5befdebbc22e76d228933b [2021-12-28 05:48:12,938 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 05:48:12,963 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 05:48:12,965 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 05:48:12,966 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 05:48:12,967 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 05:48:12,968 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/960521-1-3.i [2021-12-28 05:48:13,021 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e599064c/4bf50653ce7c4313b8b77247a35457a2/FLAGd8dd606e8 [2021-12-28 05:48:13,533 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 05:48:13,534 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/960521-1-3.i [2021-12-28 05:48:13,555 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e599064c/4bf50653ce7c4313b8b77247a35457a2/FLAGd8dd606e8 [2021-12-28 05:48:14,023 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e599064c/4bf50653ce7c4313b8b77247a35457a2 [2021-12-28 05:48:14,025 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 05:48:14,026 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 05:48:14,031 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 05:48:14,032 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 05:48:14,035 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 05:48:14,036 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 05:48:14" (1/1) ... [2021-12-28 05:48:14,037 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72bc4335 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:48:14, skipping insertion in model container [2021-12-28 05:48:14,037 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 05:48:14" (1/1) ... [2021-12-28 05:48:14,043 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 05:48:14,080 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 05:48:14,358 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 05:48:14,364 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 05:48:14,417 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 05:48:14,442 INFO L208 MainTranslator]: Completed translation [2021-12-28 05:48:14,442 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:48:14 WrapperNode [2021-12-28 05:48:14,443 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 05:48:14,444 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 05:48:14,444 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 05:48:14,444 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 05:48:14,451 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:48:14" (1/1) ... [2021-12-28 05:48:14,479 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:48:14" (1/1) ... [2021-12-28 05:48:14,502 INFO L137 Inliner]: procedures = 121, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2021-12-28 05:48:14,503 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 05:48:14,504 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 05:48:14,504 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 05:48:14,504 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 05:48:14,510 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:48:14" (1/1) ... [2021-12-28 05:48:14,511 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:48:14" (1/1) ... [2021-12-28 05:48:14,518 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:48:14" (1/1) ... [2021-12-28 05:48:14,518 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:48:14" (1/1) ... [2021-12-28 05:48:14,531 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:48:14" (1/1) ... [2021-12-28 05:48:14,535 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:48:14" (1/1) ... [2021-12-28 05:48:14,542 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:48:14" (1/1) ... [2021-12-28 05:48:14,544 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 05:48:14,548 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 05:48:14,549 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 05:48:14,549 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 05:48:14,550 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:48:14" (1/1) ... [2021-12-28 05:48:14,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 05:48:14,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:48:14,580 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) [2021-12-28 05:48:14,602 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 [2021-12-28 05:48:14,627 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-28 05:48:14,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-28 05:48:14,628 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-28 05:48:14,628 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 05:48:14,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-28 05:48:14,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 05:48:14,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 05:48:14,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 05:48:14,760 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 05:48:14,761 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 05:48:14,972 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 05:48:14,978 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 05:48:14,978 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-28 05:48:14,980 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 05:48:14 BoogieIcfgContainer [2021-12-28 05:48:14,980 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 05:48:14,982 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 05:48:14,982 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 05:48:14,984 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 05:48:14,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 05:48:14" (1/3) ... [2021-12-28 05:48:14,985 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a741d59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 05:48:14, skipping insertion in model container [2021-12-28 05:48:14,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:48:14" (2/3) ... [2021-12-28 05:48:14,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a741d59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 05:48:14, skipping insertion in model container [2021-12-28 05:48:14,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 05:48:14" (3/3) ... [2021-12-28 05:48:14,987 INFO L111 eAbstractionObserver]: Analyzing ICFG 960521-1-3.i [2021-12-28 05:48:14,992 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 05:48:14,992 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2021-12-28 05:48:15,027 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 05:48:15,033 INFO L339 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-28 05:48:15,034 INFO L340 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2021-12-28 05:48:15,046 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 29 states have (on average 1.896551724137931) internal successors, (55), 50 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:48:15,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-28 05:48:15,052 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:48:15,052 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-28 05:48:15,053 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-28 05:48:15,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:48:15,057 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-12-28 05:48:15,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:48:15,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643103854] [2021-12-28 05:48:15,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:48:15,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:48:15,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:48:15,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:48:15,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:48:15,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643103854] [2021-12-28 05:48:15,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643103854] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:48:15,268 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:48:15,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 05:48:15,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502832597] [2021-12-28 05:48:15,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:48:15,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 05:48:15,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:48:15,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 05:48:15,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 05:48:15,305 INFO L87 Difference]: Start difference. First operand has 51 states, 29 states have (on average 1.896551724137931) internal successors, (55), 50 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:48:15,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:48:15,352 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2021-12-28 05:48:15,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 05:48:15,356 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-12-28 05:48:15,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:48:15,361 INFO L225 Difference]: With dead ends: 50 [2021-12-28 05:48:15,361 INFO L226 Difference]: Without dead ends: 48 [2021-12-28 05:48:15,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 05:48:15,366 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 2 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:48:15,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 81 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:48:15,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-28 05:48:15,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-12-28 05:48:15,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 47 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:48:15,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2021-12-28 05:48:15,392 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 3 [2021-12-28 05:48:15,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:48:15,393 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2021-12-28 05:48:15,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:48:15,393 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2021-12-28 05:48:15,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-28 05:48:15,394 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:48:15,394 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-28 05:48:15,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 05:48:15,394 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-28 05:48:15,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:48:15,395 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-12-28 05:48:15,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:48:15,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465232130] [2021-12-28 05:48:15,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:48:15,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:48:15,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:48:15,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:48:15,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:48:15,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465232130] [2021-12-28 05:48:15,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465232130] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:48:15,436 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:48:15,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 05:48:15,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177389309] [2021-12-28 05:48:15,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:48:15,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 05:48:15,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:48:15,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 05:48:15,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 05:48:15,439 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:48:15,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:48:15,454 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2021-12-28 05:48:15,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 05:48:15,455 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-12-28 05:48:15,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:48:15,456 INFO L225 Difference]: With dead ends: 47 [2021-12-28 05:48:15,456 INFO L226 Difference]: Without dead ends: 47 [2021-12-28 05:48:15,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 05:48:15,458 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 1 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:48:15,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 87 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:48:15,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-28 05:48:15,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-12-28 05:48:15,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 28 states have (on average 1.75) internal successors, (49), 46 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:48:15,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2021-12-28 05:48:15,463 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 3 [2021-12-28 05:48:15,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:48:15,464 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2021-12-28 05:48:15,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:48:15,464 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2021-12-28 05:48:15,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-28 05:48:15,465 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:48:15,465 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-28 05:48:15,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 05:48:15,465 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-28 05:48:15,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:48:15,466 INFO L85 PathProgramCache]: Analyzing trace with hash 889446312, now seen corresponding path program 1 times [2021-12-28 05:48:15,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:48:15,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158239504] [2021-12-28 05:48:15,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:48:15,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:48:15,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:48:15,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:48:15,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:48:15,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158239504] [2021-12-28 05:48:15,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158239504] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:48:15,518 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:48:15,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 05:48:15,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516570746] [2021-12-28 05:48:15,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:48:15,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 05:48:15,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:48:15,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 05:48:15,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:48:15,520 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:48:15,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:48:15,555 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2021-12-28 05:48:15,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 05:48:15,556 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-28 05:48:15,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:48:15,557 INFO L225 Difference]: With dead ends: 44 [2021-12-28 05:48:15,557 INFO L226 Difference]: Without dead ends: 44 [2021-12-28 05:48:15,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:48:15,559 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 28 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:48:15,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 51 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:48:15,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-28 05:48:15,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-12-28 05:48:15,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 43 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:48:15,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2021-12-28 05:48:15,569 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 6 [2021-12-28 05:48:15,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:48:15,570 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2021-12-28 05:48:15,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:48:15,570 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2021-12-28 05:48:15,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-28 05:48:15,571 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:48:15,571 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-28 05:48:15,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 05:48:15,571 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-28 05:48:15,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:48:15,572 INFO L85 PathProgramCache]: Analyzing trace with hash 889446313, now seen corresponding path program 1 times [2021-12-28 05:48:15,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:48:15,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50016241] [2021-12-28 05:48:15,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:48:15,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:48:15,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:48:15,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:48:15,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:48:15,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50016241] [2021-12-28 05:48:15,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50016241] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:48:15,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:48:15,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 05:48:15,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473298920] [2021-12-28 05:48:15,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:48:15,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 05:48:15,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:48:15,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 05:48:15,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 05:48:15,659 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:48:15,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:48:15,722 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2021-12-28 05:48:15,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 05:48:15,723 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-28 05:48:15,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:48:15,724 INFO L225 Difference]: With dead ends: 50 [2021-12-28 05:48:15,724 INFO L226 Difference]: Without dead ends: 50 [2021-12-28 05:48:15,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 05:48:15,725 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 53 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:48:15,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 62 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:48:15,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-28 05:48:15,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2021-12-28 05:48:15,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 44 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:48:15,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-12-28 05:48:15,731 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 6 [2021-12-28 05:48:15,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:48:15,731 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-12-28 05:48:15,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:48:15,732 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-12-28 05:48:15,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-28 05:48:15,732 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:48:15,732 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:48:15,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 05:48:15,733 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-28 05:48:15,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:48:15,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1841820687, now seen corresponding path program 1 times [2021-12-28 05:48:15,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:48:15,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688581093] [2021-12-28 05:48:15,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:48:15,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:48:15,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:48:15,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:48:15,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:48:15,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688581093] [2021-12-28 05:48:15,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688581093] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:48:15,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446539991] [2021-12-28 05:48:15,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:48:15,839 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:48:15,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:48:15,841 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) [2021-12-28 05:48:15,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-28 05:48:15,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:48:15,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-28 05:48:15,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:48:15,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:48:15,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-28 05:48:16,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-28 05:48:16,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:48:16,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:48:16,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:48:16,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446539991] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:48:16,192 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:48:16,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2021-12-28 05:48:16,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620564306] [2021-12-28 05:48:16,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:48:16,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 05:48:16,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:48:16,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 05:48:16,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-28 05:48:16,194 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:48:16,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:48:16,368 INFO L93 Difference]: Finished difference Result 95 states and 101 transitions. [2021-12-28 05:48:16,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 05:48:16,369 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-28 05:48:16,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:48:16,376 INFO L225 Difference]: With dead ends: 95 [2021-12-28 05:48:16,377 INFO L226 Difference]: Without dead ends: 95 [2021-12-28 05:48:16,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-12-28 05:48:16,380 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 302 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:48:16,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 101 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:48:16,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-28 05:48:16,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 57. [2021-12-28 05:48:16,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 43 states have (on average 1.4883720930232558) internal successors, (64), 56 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:48:16,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2021-12-28 05:48:16,402 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 9 [2021-12-28 05:48:16,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:48:16,403 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2021-12-28 05:48:16,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:48:16,403 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2021-12-28 05:48:16,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-28 05:48:16,403 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:48:16,404 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:48:16,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-28 05:48:16,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:48:16,632 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-28 05:48:16,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:48:16,632 INFO L85 PathProgramCache]: Analyzing trace with hash 463101433, now seen corresponding path program 1 times [2021-12-28 05:48:16,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:48:16,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935485067] [2021-12-28 05:48:16,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:48:16,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:48:16,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:48:16,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:48:16,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:48:16,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935485067] [2021-12-28 05:48:16,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935485067] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:48:16,671 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:48:16,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 05:48:16,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627144425] [2021-12-28 05:48:16,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:48:16,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 05:48:16,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:48:16,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 05:48:16,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:48:16,673 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:48:16,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:48:16,702 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2021-12-28 05:48:16,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 05:48:16,703 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-28 05:48:16,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:48:16,704 INFO L225 Difference]: With dead ends: 55 [2021-12-28 05:48:16,704 INFO L226 Difference]: Without dead ends: 55 [2021-12-28 05:48:16,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 05:48:16,705 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 17 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:48:16,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 61 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:48:16,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-12-28 05:48:16,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-12-28 05:48:16,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 43 states have (on average 1.4186046511627908) internal successors, (61), 54 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:48:16,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2021-12-28 05:48:16,709 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 11 [2021-12-28 05:48:16,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:48:16,709 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2021-12-28 05:48:16,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:48:16,710 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2021-12-28 05:48:16,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-28 05:48:16,710 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:48:16,710 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:48:16,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 05:48:16,711 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-28 05:48:16,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:48:16,711 INFO L85 PathProgramCache]: Analyzing trace with hash 463101434, now seen corresponding path program 1 times [2021-12-28 05:48:16,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:48:16,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241375632] [2021-12-28 05:48:16,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:48:16,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:48:16,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:48:16,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:48:16,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:48:16,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241375632] [2021-12-28 05:48:16,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241375632] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:48:16,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603459617] [2021-12-28 05:48:16,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:48:16,750 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:48:16,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:48:16,751 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) [2021-12-28 05:48:16,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-28 05:48:16,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:48:16,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-28 05:48:16,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:48:16,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:48:16,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:48:16,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:48:16,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603459617] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:48:16,901 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:48:16,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2021-12-28 05:48:16,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11497269] [2021-12-28 05:48:16,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:48:16,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 05:48:16,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:48:16,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 05:48:16,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-12-28 05:48:16,904 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:48:16,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:48:16,968 INFO L93 Difference]: Finished difference Result 87 states and 90 transitions. [2021-12-28 05:48:16,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 05:48:16,969 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-28 05:48:16,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:48:16,970 INFO L225 Difference]: With dead ends: 87 [2021-12-28 05:48:16,970 INFO L226 Difference]: Without dead ends: 87 [2021-12-28 05:48:16,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-12-28 05:48:16,972 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 241 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:48:16,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 89 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:48:16,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-12-28 05:48:16,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 55. [2021-12-28 05:48:16,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:48:16,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2021-12-28 05:48:16,976 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 11 [2021-12-28 05:48:16,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:48:16,976 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2021-12-28 05:48:16,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:48:16,977 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2021-12-28 05:48:16,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-28 05:48:16,977 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:48:16,977 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1] [2021-12-28 05:48:17,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-28 05:48:17,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-28 05:48:17,199 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-28 05:48:17,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:48:17,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1941957673, now seen corresponding path program 2 times [2021-12-28 05:48:17,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:48:17,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510329990] [2021-12-28 05:48:17,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:48:17,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:48:17,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:48:17,407 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:48:17,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:48:17,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510329990] [2021-12-28 05:48:17,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510329990] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:48:17,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897577686] [2021-12-28 05:48:17,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 05:48:17,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:48:17,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:48:17,416 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) [2021-12-28 05:48:17,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-28 05:48:17,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 05:48:17,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:48:17,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-28 05:48:17,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:48:17,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:48:17,504 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-28 05:48:17,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-28 05:48:17,699 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:48:17,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:48:18,134 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:48:18,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897577686] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:48:18,135 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:48:18,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 23 [2021-12-28 05:48:18,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136398732] [2021-12-28 05:48:18,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:48:18,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-28 05:48:18,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:48:18,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-28 05:48:18,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2021-12-28 05:48:18,137 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:48:18,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:48:18,535 INFO L93 Difference]: Finished difference Result 184 states and 190 transitions. [2021-12-28 05:48:18,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-28 05:48:18,536 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-28 05:48:18,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:48:18,536 INFO L225 Difference]: With dead ends: 184 [2021-12-28 05:48:18,536 INFO L226 Difference]: Without dead ends: 184 [2021-12-28 05:48:18,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=251, Invalid=505, Unknown=0, NotChecked=0, Total=756 [2021-12-28 05:48:18,537 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1077 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1077 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 05:48:18,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1077 Valid, 157 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 05:48:18,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-12-28 05:48:18,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 59. [2021-12-28 05:48:18,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 48 states have (on average 1.2916666666666667) internal successors, (62), 58 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:48:18,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2021-12-28 05:48:18,542 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 18 [2021-12-28 05:48:18,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:48:18,542 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2021-12-28 05:48:18,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:48:18,543 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2021-12-28 05:48:18,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-28 05:48:18,543 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:48:18,544 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:48:18,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-28 05:48:18,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:48:18,756 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-28 05:48:18,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:48:18,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1502042668, now seen corresponding path program 2 times [2021-12-28 05:48:18,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:48:18,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055345027] [2021-12-28 05:48:18,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:48:18,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:48:18,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:48:18,835 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:48:18,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:48:18,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055345027] [2021-12-28 05:48:18,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055345027] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:48:18,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090354505] [2021-12-28 05:48:18,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 05:48:18,837 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:48:18,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:48:18,838 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) [2021-12-28 05:48:18,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-28 05:48:18,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-28 05:48:18,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:48:18,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-28 05:48:18,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:48:18,934 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-28 05:48:18,935 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-28 05:48:19,075 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-28 05:48:19,075 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 05:48:19,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090354505] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:48:19,075 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 05:48:19,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 12 [2021-12-28 05:48:19,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846059005] [2021-12-28 05:48:19,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:48:19,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 05:48:19,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:48:19,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 05:48:19,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-12-28 05:48:19,078 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:48:19,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:48:19,103 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2021-12-28 05:48:19,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 05:48:19,104 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-28 05:48:19,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:48:19,105 INFO L225 Difference]: With dead ends: 35 [2021-12-28 05:48:19,105 INFO L226 Difference]: Without dead ends: 35 [2021-12-28 05:48:19,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-12-28 05:48:19,106 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 13 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:48:19,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 8 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:48:19,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-28 05:48:19,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-12-28 05:48:19,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 34 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:48:19,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2021-12-28 05:48:19,108 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 26 [2021-12-28 05:48:19,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:48:19,109 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2021-12-28 05:48:19,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:48:19,109 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2021-12-28 05:48:19,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-28 05:48:19,110 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:48:19,110 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:48:19,134 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-28 05:48:19,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:48:19,323 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-28 05:48:19,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:48:19,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1911110645, now seen corresponding path program 1 times [2021-12-28 05:48:19,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:48:19,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121405534] [2021-12-28 05:48:19,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:48:19,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:48:19,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:48:19,404 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 05:48:19,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:48:19,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121405534] [2021-12-28 05:48:19,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121405534] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:48:19,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385102404] [2021-12-28 05:48:19,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:48:19,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:48:19,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:48:19,407 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) [2021-12-28 05:48:19,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-28 05:48:19,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:48:19,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-28 05:48:19,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:48:19,667 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 05:48:19,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:48:19,831 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 05:48:19,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385102404] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:48:19,832 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:48:19,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2021-12-28 05:48:19,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885886421] [2021-12-28 05:48:19,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:48:19,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-28 05:48:19,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:48:19,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-28 05:48:19,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=341, Unknown=0, NotChecked=0, Total=600 [2021-12-28 05:48:19,835 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 25 states, 25 states have (on average 2.8) internal successors, (70), 25 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:48:20,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:48:20,062 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2021-12-28 05:48:20,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-28 05:48:20,062 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.8) internal successors, (70), 25 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-28 05:48:20,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:48:20,063 INFO L225 Difference]: With dead ends: 121 [2021-12-28 05:48:20,063 INFO L226 Difference]: Without dead ends: 121 [2021-12-28 05:48:20,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=392, Invalid=600, Unknown=0, NotChecked=0, Total=992 [2021-12-28 05:48:20,065 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 237 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:48:20,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 36 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:48:20,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-12-28 05:48:20,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 74. [2021-12-28 05:48:20,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 72 states have (on average 1.1111111111111112) internal successors, (80), 73 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:48:20,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2021-12-28 05:48:20,068 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 29 [2021-12-28 05:48:20,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:48:20,069 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2021-12-28 05:48:20,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.8) internal successors, (70), 25 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:48:20,069 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2021-12-28 05:48:20,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-28 05:48:20,070 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:48:20,070 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:48:20,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-28 05:48:20,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-28 05:48:20,291 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-28 05:48:20,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:48:20,292 INFO L85 PathProgramCache]: Analyzing trace with hash -248790283, now seen corresponding path program 2 times [2021-12-28 05:48:20,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:48:20,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932163165] [2021-12-28 05:48:20,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:48:20,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:48:20,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:48:20,487 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 05:48:20,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:48:20,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932163165] [2021-12-28 05:48:20,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932163165] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:48:20,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145901655] [2021-12-28 05:48:20,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 05:48:20,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:48:20,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:48:20,490 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) [2021-12-28 05:48:20,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-28 05:48:20,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 05:48:20,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:48:20,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-28 05:48:20,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:48:20,974 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 05:48:20,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:48:21,434 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 05:48:21,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145901655] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:48:21,434 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:48:21,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 49 [2021-12-28 05:48:21,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321937934] [2021-12-28 05:48:21,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:48:21,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-28 05:48:21,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:48:21,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-28 05:48:21,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1027, Invalid=1325, Unknown=0, NotChecked=0, Total=2352 [2021-12-28 05:48:21,438 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand has 49 states, 49 states have (on average 2.8979591836734695) internal successors, (142), 49 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:48:22,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:48:22,109 INFO L93 Difference]: Finished difference Result 257 states and 258 transitions. [2021-12-28 05:48:22,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-28 05:48:22,109 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.8979591836734695) internal successors, (142), 49 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-12-28 05:48:22,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:48:22,113 INFO L225 Difference]: With dead ends: 257 [2021-12-28 05:48:22,113 INFO L226 Difference]: Without dead ends: 257 [2021-12-28 05:48:22,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1552, Invalid=2480, Unknown=0, NotChecked=0, Total=4032 [2021-12-28 05:48:22,115 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 702 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 702 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 05:48:22,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [702 Valid, 56 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 05:48:22,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-12-28 05:48:22,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 146. [2021-12-28 05:48:22,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 144 states have (on average 1.1111111111111112) internal successors, (160), 145 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:48:22,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 160 transitions. [2021-12-28 05:48:22,135 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 160 transitions. Word has length 53 [2021-12-28 05:48:22,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:48:22,136 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 160 transitions. [2021-12-28 05:48:22,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.8979591836734695) internal successors, (142), 49 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:48:22,137 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 160 transitions. [2021-12-28 05:48:22,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-28 05:48:22,138 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:48:22,139 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:48:22,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-28 05:48:22,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:48:22,356 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-28 05:48:22,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:48:22,356 INFO L85 PathProgramCache]: Analyzing trace with hash -2038312715, now seen corresponding path program 3 times [2021-12-28 05:48:22,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:48:22,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662160262] [2021-12-28 05:48:22,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:48:22,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:48:22,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:48:22,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 05:48:22,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:48:22,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662160262] [2021-12-28 05:48:22,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662160262] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:48:22,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785305085] [2021-12-28 05:48:22,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-28 05:48:22,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:48:22,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:48:22,956 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) [2021-12-28 05:48:22,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-28 05:48:23,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-28 05:48:23,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:48:23,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-28 05:48:23,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:48:23,064 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-28 05:48:23,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-28 05:48:23,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2021-12-28 05:48:23,590 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 05:48:23,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785305085] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:48:23,590 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 05:48:23,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [34] total 38 [2021-12-28 05:48:23,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231320411] [2021-12-28 05:48:23,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:48:23,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 05:48:23,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:48:23,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 05:48:23,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=545, Invalid=861, Unknown=0, NotChecked=0, Total=1406 [2021-12-28 05:48:23,593 INFO L87 Difference]: Start difference. First operand 146 states and 160 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:48:23,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:48:23,626 INFO L93 Difference]: Finished difference Result 145 states and 146 transitions. [2021-12-28 05:48:23,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 05:48:23,627 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-12-28 05:48:23,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:48:23,628 INFO L225 Difference]: With dead ends: 145 [2021-12-28 05:48:23,628 INFO L226 Difference]: Without dead ends: 145 [2021-12-28 05:48:23,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=545, Invalid=861, Unknown=0, NotChecked=0, Total=1406 [2021-12-28 05:48:23,629 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 16 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:48:23,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 6 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:48:23,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-12-28 05:48:23,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-12-28 05:48:23,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.0138888888888888) internal successors, (146), 144 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:48:23,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2021-12-28 05:48:23,632 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 101 [2021-12-28 05:48:23,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:48:23,632 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2021-12-28 05:48:23,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:48:23,633 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2021-12-28 05:48:23,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-12-28 05:48:23,634 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:48:23,634 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:48:23,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-28 05:48:23,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:48:23,855 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-28 05:48:23,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:48:23,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1597271634, now seen corresponding path program 1 times [2021-12-28 05:48:23,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:48:23,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476120248] [2021-12-28 05:48:23,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:48:23,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:48:23,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:48:24,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1665 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2021-12-28 05:48:24,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:48:24,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476120248] [2021-12-28 05:48:24,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476120248] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:48:24,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176672816] [2021-12-28 05:48:24,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:48:24,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:48:24,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:48:24,076 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) [2021-12-28 05:48:24,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-28 05:48:24,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:48:24,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-28 05:48:24,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:48:25,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1665 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-12-28 05:48:25,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:48:26,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1665 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-12-28 05:48:26,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176672816] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:48:26,374 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:48:26,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 34, 34] total 82 [2021-12-28 05:48:26,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792505853] [2021-12-28 05:48:26,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:48:26,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-12-28 05:48:26,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:48:26,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-12-28 05:48:26,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2370, Invalid=4272, Unknown=0, NotChecked=0, Total=6642 [2021-12-28 05:48:26,378 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand has 82 states, 82 states have (on average 3.048780487804878) internal successors, (250), 82 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:48:28,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:48:28,052 INFO L93 Difference]: Finished difference Result 469 states and 470 transitions. [2021-12-28 05:48:28,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-12-28 05:48:28,053 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 3.048780487804878) internal successors, (250), 82 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2021-12-28 05:48:28,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:48:28,054 INFO L225 Difference]: With dead ends: 469 [2021-12-28 05:48:28,054 INFO L226 Difference]: Without dead ends: 469 [2021-12-28 05:48:28,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3949 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=4529, Invalid=8353, Unknown=0, NotChecked=0, Total=12882 [2021-12-28 05:48:28,060 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 1372 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 435 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1372 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 435 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-28 05:48:28,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1372 Valid, 93 Invalid, 925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [435 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-28 05:48:28,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-12-28 05:48:28,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 289. [2021-12-28 05:48:28,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.0069444444444444) internal successors, (290), 288 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:48:28,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 290 transitions. [2021-12-28 05:48:28,077 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 290 transitions. Word has length 144 [2021-12-28 05:48:28,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:48:28,078 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 290 transitions. [2021-12-28 05:48:28,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 3.048780487804878) internal successors, (250), 82 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:48:28,078 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 290 transitions. [2021-12-28 05:48:28,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2021-12-28 05:48:28,080 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:48:28,081 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 62, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:48:28,101 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-28 05:48:28,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-28 05:48:28,296 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-28 05:48:28,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:48:28,296 INFO L85 PathProgramCache]: Analyzing trace with hash -2434898, now seen corresponding path program 2 times [2021-12-28 05:48:28,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:48:28,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888297338] [2021-12-28 05:48:28,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:48:28,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:48:28,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:48:28,891 INFO L134 CoverageAnalysis]: Checked inductivity of 7161 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 5735 trivial. 0 not checked. [2021-12-28 05:48:28,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:48:28,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888297338] [2021-12-28 05:48:28,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888297338] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:48:28,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391310256] [2021-12-28 05:48:28,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 05:48:28,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:48:28,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:48:28,893 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) [2021-12-28 05:48:28,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-28 05:48:29,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 05:48:29,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:48:29,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 1101 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-28 05:48:29,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:48:31,622 INFO L134 CoverageAnalysis]: Checked inductivity of 7161 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2021-12-28 05:48:31,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:48:35,517 INFO L134 CoverageAnalysis]: Checked inductivity of 7161 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2021-12-28 05:48:35,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391310256] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:48:35,517 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:48:35,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 66, 66] total 162 [2021-12-28 05:48:35,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123894457] [2021-12-28 05:48:35,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:48:35,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 162 states [2021-12-28 05:48:35,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:48:35,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2021-12-28 05:48:35,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9346, Invalid=16736, Unknown=0, NotChecked=0, Total=26082 [2021-12-28 05:48:35,526 INFO L87 Difference]: Start difference. First operand 289 states and 290 transitions. Second operand has 162 states, 162 states have (on average 3.0246913580246915) internal successors, (490), 162 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:48:42,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:48:42,798 INFO L93 Difference]: Finished difference Result 949 states and 950 transitions. [2021-12-28 05:48:42,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-12-28 05:48:42,799 INFO L78 Accepts]: Start accepts. Automaton has has 162 states, 162 states have (on average 3.0246913580246915) internal successors, (490), 162 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 288 [2021-12-28 05:48:42,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:48:42,802 INFO L225 Difference]: With dead ends: 949 [2021-12-28 05:48:42,802 INFO L226 Difference]: Without dead ends: 949 [2021-12-28 05:48:42,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 736 GetRequests, 512 SyntacticMatches, 0 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16093 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=17761, Invalid=33089, Unknown=0, NotChecked=0, Total=50850 [2021-12-28 05:48:42,808 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 3065 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 1106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3065 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 2059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1106 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-28 05:48:42,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3065 Valid, 159 Invalid, 2059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1106 Valid, 953 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-28 05:48:42,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2021-12-28 05:48:42,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 577. [2021-12-28 05:48:42,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 576 states have (on average 1.0034722222222223) internal successors, (578), 576 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:48:42,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 578 transitions. [2021-12-28 05:48:42,818 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 578 transitions. Word has length 288 [2021-12-28 05:48:42,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:48:42,818 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 578 transitions. [2021-12-28 05:48:42,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 162 states, 162 states have (on average 3.0246913580246915) internal successors, (490), 162 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:48:42,819 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 578 transitions. [2021-12-28 05:48:42,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 577 [2021-12-28 05:48:42,827 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:48:42,828 INFO L514 BasicCegarLoop]: trace histogram [126, 126, 126, 63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:48:42,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-28 05:48:43,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-28 05:48:43,054 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-28 05:48:43,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:48:43,054 INFO L85 PathProgramCache]: Analyzing trace with hash -2038208850, now seen corresponding path program 3 times [2021-12-28 05:48:43,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:48:43,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648231707] [2021-12-28 05:48:43,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:48:43,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:48:43,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:48:44,931 INFO L134 CoverageAnalysis]: Checked inductivity of 29673 backedges. 0 proven. 5922 refuted. 0 times theorem prover too weak. 23751 trivial. 0 not checked. [2021-12-28 05:48:44,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:48:44,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648231707] [2021-12-28 05:48:44,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648231707] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:48:44,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314977660] [2021-12-28 05:48:44,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-28 05:48:44,932 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:48:44,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:48:44,933 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) [2021-12-28 05:48:44,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process