./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-examples/standard_strcpy_ground-2.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/array-examples/standard_strcpy_ground-2.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 1dc3813f801c08c10697b6f3aeaa3afb846521f0bb73d940036cc656d8340c66 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 05:47:08,419 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 05:47:08,421 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 05:47:08,452 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 05:47:08,453 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 05:47:08,456 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 05:47:08,457 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 05:47:08,460 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 05:47:08,462 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 05:47:08,466 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 05:47:08,467 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 05:47:08,471 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 05:47:08,471 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 05:47:08,472 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 05:47:08,473 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 05:47:08,474 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 05:47:08,475 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 05:47:08,476 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 05:47:08,477 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 05:47:08,478 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 05:47:08,479 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 05:47:08,480 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 05:47:08,481 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 05:47:08,482 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 05:47:08,484 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 05:47:08,485 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 05:47:08,485 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 05:47:08,486 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 05:47:08,486 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 05:47:08,487 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 05:47:08,487 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 05:47:08,488 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 05:47:08,489 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 05:47:08,490 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 05:47:08,490 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 05:47:08,491 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 05:47:08,491 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 05:47:08,492 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 05:47:08,492 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 05:47:08,493 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 05:47:08,493 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 05:47:08,494 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-28 05:47:08,535 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 05:47:08,537 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 05:47:08,538 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 05:47:08,538 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 05:47:08,539 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 05:47:08,539 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 05:47:08,540 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 05:47:08,541 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 05:47:08,541 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 05:47:08,541 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 05:47:08,542 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 05:47:08,542 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-28 05:47:08,542 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 05:47:08,542 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 05:47:08,543 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 05:47:08,543 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-28 05:47:08,543 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-28 05:47:08,543 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-28 05:47:08,543 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 05:47:08,544 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-28 05:47:08,544 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 05:47:08,544 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 05:47:08,544 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 05:47:08,544 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 05:47:08,545 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 05:47:08,545 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 05:47:08,545 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 05:47:08,545 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 05:47:08,545 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 05:47:08,546 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 05:47:08,546 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1dc3813f801c08c10697b6f3aeaa3afb846521f0bb73d940036cc656d8340c66 [2021-12-28 05:47:08,869 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 05:47:08,886 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 05:47:08,888 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 05:47:08,889 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 05:47:08,890 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 05:47:08,892 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_strcpy_ground-2.i [2021-12-28 05:47:08,950 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf64abb1c/ebdcd242d700442a978f094b5e2ce5b5/FLAG1cfddf50b [2021-12-28 05:47:09,407 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 05:47:09,408 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_strcpy_ground-2.i [2021-12-28 05:47:09,413 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf64abb1c/ebdcd242d700442a978f094b5e2ce5b5/FLAG1cfddf50b [2021-12-28 05:47:09,797 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf64abb1c/ebdcd242d700442a978f094b5e2ce5b5 [2021-12-28 05:47:09,799 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 05:47:09,800 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 05:47:09,803 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 05:47:09,803 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 05:47:09,809 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 05:47:09,809 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 05:47:09" (1/1) ... [2021-12-28 05:47:09,810 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67b7c0c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:47:09, skipping insertion in model container [2021-12-28 05:47:09,810 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 05:47:09" (1/1) ... [2021-12-28 05:47:09,816 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 05:47:09,828 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 05:47:09,954 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_strcpy_ground-2.i[817,830] [2021-12-28 05:47:09,969 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 05:47:09,976 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 05:47:09,989 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_strcpy_ground-2.i[817,830] [2021-12-28 05:47:10,007 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 05:47:10,043 INFO L208 MainTranslator]: Completed translation [2021-12-28 05:47:10,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:47:10 WrapperNode [2021-12-28 05:47:10,051 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 05:47:10,053 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 05:47:10,053 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 05:47:10,053 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 05:47:10,058 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:47:10" (1/1) ... [2021-12-28 05:47:10,073 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:47:10" (1/1) ... [2021-12-28 05:47:10,098 INFO L137 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2021-12-28 05:47:10,098 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 05:47:10,099 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 05:47:10,100 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 05:47:10,100 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 05:47:10,106 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:47:10" (1/1) ... [2021-12-28 05:47:10,107 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:47:10" (1/1) ... [2021-12-28 05:47:10,110 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:47:10" (1/1) ... [2021-12-28 05:47:10,111 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:47:10" (1/1) ... [2021-12-28 05:47:10,125 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:47:10" (1/1) ... [2021-12-28 05:47:10,128 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:47:10" (1/1) ... [2021-12-28 05:47:10,135 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:47:10" (1/1) ... [2021-12-28 05:47:10,137 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 05:47:10,138 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 05:47:10,139 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 05:47:10,139 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 05:47:10,140 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:47:10" (1/1) ... [2021-12-28 05:47:10,145 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 05:47:10,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:47:10,168 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 05:47:10,190 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 05:47:10,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 05:47:10,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 05:47:10,213 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-28 05:47:10,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-28 05:47:10,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 05:47:10,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 05:47:10,213 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-28 05:47:10,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-28 05:47:10,278 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 05:47:10,280 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 05:47:10,491 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 05:47:10,508 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 05:47:10,508 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-28 05:47:10,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 05:47:10 BoogieIcfgContainer [2021-12-28 05:47:10,509 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 05:47:10,527 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 05:47:10,527 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 05:47:10,530 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 05:47:10,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 05:47:09" (1/3) ... [2021-12-28 05:47:10,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40ffdc2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 05:47:10, skipping insertion in model container [2021-12-28 05:47:10,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:47:10" (2/3) ... [2021-12-28 05:47:10,531 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40ffdc2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 05:47:10, skipping insertion in model container [2021-12-28 05:47:10,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 05:47:10" (3/3) ... [2021-12-28 05:47:10,540 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_strcpy_ground-2.i [2021-12-28 05:47:10,545 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 05:47:10,546 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2021-12-28 05:47:10,582 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 05:47:10,588 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 05:47:10,588 INFO L340 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2021-12-28 05:47:10,600 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 24 states have (on average 1.875) internal successors, (45), 38 states have internal predecessors, (45), 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 05:47:10,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-12-28 05:47:10,605 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:47:10,606 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-12-28 05:47:10,606 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-12-28 05:47:10,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:47:10,611 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2021-12-28 05:47:10,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:47:10,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236567992] [2021-12-28 05:47:10,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:47:10,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:47:10,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:47:10,784 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 05:47:10,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:47:10,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236567992] [2021-12-28 05:47:10,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236567992] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:47:10,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:47:10,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 05:47:10,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364593656] [2021-12-28 05:47:10,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:47:10,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 05:47:10,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:47:10,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 05:47:10,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 05:47:10,835 INFO L87 Difference]: Start difference. First operand has 39 states, 24 states have (on average 1.875) internal successors, (45), 38 states have internal predecessors, (45), 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 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 05:47:10,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:47:10,902 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2021-12-28 05:47:10,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 05:47:10,905 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2021-12-28 05:47:10,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:47:10,912 INFO L225 Difference]: With dead ends: 35 [2021-12-28 05:47:10,912 INFO L226 Difference]: Without dead ends: 33 [2021-12-28 05:47:10,914 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 05:47:10,919 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 30 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:47:10,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 25 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:47:10,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-28 05:47:10,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-12-28 05:47:10,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 32 states have internal predecessors, (35), 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 05:47:10,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-12-28 05:47:10,951 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 4 [2021-12-28 05:47:10,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:47:10,951 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-12-28 05:47:10,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 05:47:10,952 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-12-28 05:47:10,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-12-28 05:47:10,953 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:47:10,953 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-12-28 05:47:10,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 05:47:10,954 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-12-28 05:47:10,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:47:10,956 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2021-12-28 05:47:10,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:47:10,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856823273] [2021-12-28 05:47:10,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:47:10,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:47:10,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:47:11,045 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 05:47:11,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:47:11,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856823273] [2021-12-28 05:47:11,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856823273] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:47:11,047 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:47:11,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 05:47:11,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947327613] [2021-12-28 05:47:11,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:47:11,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 05:47:11,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:47:11,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 05:47:11,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 05:47:11,051 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 05:47:11,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:47:11,100 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2021-12-28 05:47:11,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 05:47:11,101 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2021-12-28 05:47:11,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:47:11,104 INFO L225 Difference]: With dead ends: 37 [2021-12-28 05:47:11,104 INFO L226 Difference]: Without dead ends: 37 [2021-12-28 05:47:11,107 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 05:47:11,109 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:47:11,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 45 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:47:11,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-28 05:47:11,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2021-12-28 05:47:11,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.48) internal successors, (37), 34 states have internal predecessors, (37), 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 05:47:11,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2021-12-28 05:47:11,115 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 4 [2021-12-28 05:47:11,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:47:11,115 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2021-12-28 05:47:11,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 05:47:11,116 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2021-12-28 05:47:11,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-28 05:47:11,116 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:47:11,116 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2021-12-28 05:47:11,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 05:47:11,117 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-12-28 05:47:11,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:47:11,118 INFO L85 PathProgramCache]: Analyzing trace with hash 264435913, now seen corresponding path program 1 times [2021-12-28 05:47:11,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:47:11,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808502366] [2021-12-28 05:47:11,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:47:11,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:47:11,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:47:11,227 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 05:47:11,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:47:11,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808502366] [2021-12-28 05:47:11,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808502366] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:47:11,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514283776] [2021-12-28 05:47:11,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:47:11,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:47:11,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:47:11,232 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 05:47:11,234 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 05:47:11,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:47:11,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-28 05:47:11,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:47:11,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:47:11,372 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 05:47:11,379 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 05:47:11,457 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 05:47:11,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:47:11,564 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 05:47:11,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514283776] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:47:11,565 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:47:11,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-12-28 05:47:11,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348958104] [2021-12-28 05:47:11,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:47:11,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 05:47:11,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:47:11,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 05:47:11,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-28 05:47:11,567 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 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 05:47:11,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:47:11,662 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2021-12-28 05:47:11,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 05:47:11,663 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 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 8 [2021-12-28 05:47:11,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:47:11,665 INFO L225 Difference]: With dead ends: 48 [2021-12-28 05:47:11,665 INFO L226 Difference]: Without dead ends: 48 [2021-12-28 05:47:11,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-12-28 05:47:11,666 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 31 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:47:11,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 37 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:47:11,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-28 05:47:11,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-12-28 05:47:11,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 45 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 05:47:11,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-12-28 05:47:11,680 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 8 [2021-12-28 05:47:11,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:47:11,680 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-12-28 05:47:11,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 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 05:47:11,681 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-12-28 05:47:11,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-28 05:47:11,681 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:47:11,682 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-12-28 05:47:11,701 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-28 05:47:11,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:47:11,896 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-12-28 05:47:11,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:47:11,896 INFO L85 PathProgramCache]: Analyzing trace with hash -4646106, now seen corresponding path program 1 times [2021-12-28 05:47:11,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:47:11,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186181936] [2021-12-28 05:47:11,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:47:11,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:47:11,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:47:11,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:47:11,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:47:11,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186181936] [2021-12-28 05:47:11,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186181936] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:47:11,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143242043] [2021-12-28 05:47:11,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:47:11,995 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:47:11,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:47:11,996 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 05:47:12,002 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 05:47:12,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:47:12,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-28 05:47:12,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:47:12,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:47:12,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:47:12,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:47:12,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143242043] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:47:12,147 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:47:12,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 11 [2021-12-28 05:47:12,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990380201] [2021-12-28 05:47:12,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:47:12,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-28 05:47:12,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:47:12,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-28 05:47:12,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2021-12-28 05:47:12,151 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 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 05:47:12,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:47:12,395 INFO L93 Difference]: Finished difference Result 197 states and 205 transitions. [2021-12-28 05:47:12,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 05:47:12,395 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 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 13 [2021-12-28 05:47:12,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:47:12,397 INFO L225 Difference]: With dead ends: 197 [2021-12-28 05:47:12,397 INFO L226 Difference]: Without dead ends: 197 [2021-12-28 05:47:12,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-12-28 05:47:12,398 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 363 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 05:47:12,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 123 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 05:47:12,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-12-28 05:47:12,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 54. [2021-12-28 05:47:12,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 53 states have internal predecessors, (57), 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 05:47:12,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2021-12-28 05:47:12,406 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 13 [2021-12-28 05:47:12,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:47:12,406 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2021-12-28 05:47:12,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 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 05:47:12,406 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2021-12-28 05:47:12,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-28 05:47:12,407 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:47:12,407 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1] [2021-12-28 05:47:12,435 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 05:47:12,623 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,SelfDestructingSolverStorable3 [2021-12-28 05:47:12,623 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-12-28 05:47:12,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:47:12,624 INFO L85 PathProgramCache]: Analyzing trace with hash -2061457070, now seen corresponding path program 2 times [2021-12-28 05:47:12,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:47:12,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824866812] [2021-12-28 05:47:12,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:47:12,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:47:12,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:47:12,808 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:47:12,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:47:12,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824866812] [2021-12-28 05:47:12,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824866812] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:47:12,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968486875] [2021-12-28 05:47:12,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 05:47:12,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:47:12,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:47:12,811 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 05:47:12,816 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 05:47:12,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 05:47:12,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:47:12,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-28 05:47:12,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:47:12,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:47:12,922 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 05:47:12,929 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 05:47:13,132 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:47:13,133 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 05:47:13,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968486875] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:47:13,133 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 05:47:13,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 12 [2021-12-28 05:47:13,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552731730] [2021-12-28 05:47:13,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:47:13,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 05:47:13,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:47:13,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 05:47:13,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-28 05:47:13,135 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 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 05:47:13,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:47:13,290 INFO L93 Difference]: Finished difference Result 136 states and 149 transitions. [2021-12-28 05:47:13,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 05:47:13,290 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 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 20 [2021-12-28 05:47:13,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:47:13,291 INFO L225 Difference]: With dead ends: 136 [2021-12-28 05:47:13,292 INFO L226 Difference]: Without dead ends: 136 [2021-12-28 05:47:13,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-28 05:47:13,293 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 112 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:47:13,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 172 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:47:13,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-12-28 05:47:13,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 53. [2021-12-28 05:47:13,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 52 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 05:47:13,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2021-12-28 05:47:13,298 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 20 [2021-12-28 05:47:13,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:47:13,298 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2021-12-28 05:47:13,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 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 05:47:13,299 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2021-12-28 05:47:13,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-28 05:47:13,299 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:47:13,300 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:47:13,327 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 05:47:13,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:47:13,524 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-12-28 05:47:13,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:47:13,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1934674516, now seen corresponding path program 1 times [2021-12-28 05:47:13,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:47:13,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410098826] [2021-12-28 05:47:13,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:47:13,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:47:13,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:47:13,573 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-28 05:47:13,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:47:13,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410098826] [2021-12-28 05:47:13,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410098826] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:47:13,574 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:47:13,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 05:47:13,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918360257] [2021-12-28 05:47:13,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:47:13,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 05:47:13,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:47:13,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 05:47:13,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 05:47:13,576 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 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 05:47:13,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:47:13,587 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2021-12-28 05:47:13,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 05:47:13,587 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 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 32 [2021-12-28 05:47:13,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:47:13,588 INFO L225 Difference]: With dead ends: 51 [2021-12-28 05:47:13,588 INFO L226 Difference]: Without dead ends: 51 [2021-12-28 05:47:13,588 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 05:47:13,589 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 18 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:47:13,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 22 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:47:13,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-28 05:47:13,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-12-28 05:47:13,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 50 states have internal predecessors, (53), 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 05:47:13,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2021-12-28 05:47:13,593 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 32 [2021-12-28 05:47:13,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:47:13,593 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2021-12-28 05:47:13,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 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 05:47:13,594 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2021-12-28 05:47:13,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-28 05:47:13,594 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:47:13,595 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:47:13,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 05:47:13,595 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-12-28 05:47:13,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:47:13,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1934674515, now seen corresponding path program 1 times [2021-12-28 05:47:13,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:47:13,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960294634] [2021-12-28 05:47:13,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:47:13,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:47:13,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:47:13,652 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-28 05:47:13,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:47:13,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960294634] [2021-12-28 05:47:13,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960294634] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:47:13,653 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:47:13,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 05:47:13,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064941739] [2021-12-28 05:47:13,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:47:13,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 05:47:13,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:47:13,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 05:47:13,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:47:13,655 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 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 05:47:13,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:47:13,690 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2021-12-28 05:47:13,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 05:47:13,691 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 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 32 [2021-12-28 05:47:13,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:47:13,692 INFO L225 Difference]: With dead ends: 68 [2021-12-28 05:47:13,692 INFO L226 Difference]: Without dead ends: 68 [2021-12-28 05:47:13,692 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 05:47:13,693 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 43 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:47:13,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 27 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:47:13,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-12-28 05:47:13,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 54. [2021-12-28 05:47:13,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 48 states have (on average 1.1875) internal successors, (57), 53 states have internal predecessors, (57), 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 05:47:13,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2021-12-28 05:47:13,697 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 32 [2021-12-28 05:47:13,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:47:13,697 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2021-12-28 05:47:13,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 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 05:47:13,697 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2021-12-28 05:47:13,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-28 05:47:13,698 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:47:13,698 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:47:13,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-28 05:47:13,699 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-12-28 05:47:13,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:47:13,699 INFO L85 PathProgramCache]: Analyzing trace with hash 154582664, now seen corresponding path program 1 times [2021-12-28 05:47:13,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:47:13,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990850068] [2021-12-28 05:47:13,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:47:13,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:47:13,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:47:13,738 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-28 05:47:13,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:47:13,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990850068] [2021-12-28 05:47:13,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990850068] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:47:13,739 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:47:13,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 05:47:13,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932778650] [2021-12-28 05:47:13,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:47:13,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 05:47:13,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:47:13,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 05:47:13,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:47:13,740 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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 05:47:13,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:47:13,767 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2021-12-28 05:47:13,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 05:47:13,768 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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 33 [2021-12-28 05:47:13,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:47:13,768 INFO L225 Difference]: With dead ends: 60 [2021-12-28 05:47:13,769 INFO L226 Difference]: Without dead ends: 60 [2021-12-28 05:47:13,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 05:47:13,770 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 10 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:47:13,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 51 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:47:13,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-28 05:47:13,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2021-12-28 05:47:13,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 50 states have (on average 1.18) internal successors, (59), 55 states have internal predecessors, (59), 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 05:47:13,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2021-12-28 05:47:13,773 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 33 [2021-12-28 05:47:13,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:47:13,774 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2021-12-28 05:47:13,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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 05:47:13,774 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2021-12-28 05:47:13,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-28 05:47:13,775 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:47:13,775 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:47:13,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-28 05:47:13,775 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-12-28 05:47:13,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:47:13,776 INFO L85 PathProgramCache]: Analyzing trace with hash 498629567, now seen corresponding path program 1 times [2021-12-28 05:47:13,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:47:13,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839698987] [2021-12-28 05:47:13,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:47:13,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:47:13,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:47:13,838 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:47:13,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:47:13,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839698987] [2021-12-28 05:47:13,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839698987] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:47:13,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593364530] [2021-12-28 05:47:13,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:47:13,839 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:47:13,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:47:13,841 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 05:47:13,872 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 05:47:13,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:47:13,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-28 05:47:13,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:47:13,990 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:47:13,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:47:14,135 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:47:14,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593364530] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:47:14,135 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:47:14,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2021-12-28 05:47:14,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79118086] [2021-12-28 05:47:14,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:47:14,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-28 05:47:14,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:47:14,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-28 05:47:14,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-12-28 05:47:14,138 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 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 05:47:14,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:47:14,332 INFO L93 Difference]: Finished difference Result 378 states and 393 transitions. [2021-12-28 05:47:14,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-28 05:47:14,333 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 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 34 [2021-12-28 05:47:14,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:47:14,334 INFO L225 Difference]: With dead ends: 378 [2021-12-28 05:47:14,334 INFO L226 Difference]: Without dead ends: 378 [2021-12-28 05:47:14,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-12-28 05:47:14,335 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 531 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 05:47:14,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [531 Valid, 265 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 05:47:14,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-12-28 05:47:14,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 88. [2021-12-28 05:47:14,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 82 states have (on average 1.1097560975609757) internal successors, (91), 87 states have internal predecessors, (91), 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 05:47:14,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 91 transitions. [2021-12-28 05:47:14,341 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 91 transitions. Word has length 34 [2021-12-28 05:47:14,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:47:14,342 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 91 transitions. [2021-12-28 05:47:14,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 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 05:47:14,342 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 91 transitions. [2021-12-28 05:47:14,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-28 05:47:14,343 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:47:14,343 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:47:14,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-28 05:47:14,567 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 05:47:14,567 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-12-28 05:47:14,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:47:14,568 INFO L85 PathProgramCache]: Analyzing trace with hash -618447913, now seen corresponding path program 2 times [2021-12-28 05:47:14,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:47:14,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37733604] [2021-12-28 05:47:14,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:47:14,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:47:14,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:47:14,747 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:47:14,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:47:14,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37733604] [2021-12-28 05:47:14,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37733604] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:47:14,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129973432] [2021-12-28 05:47:14,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 05:47:14,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:47:14,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:47:14,752 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 05:47:14,781 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 05:47:14,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 05:47:14,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:47:14,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-28 05:47:14,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:47:14,990 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:47:14,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:47:15,482 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:47:15,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129973432] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:47:15,482 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:47:15,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2021-12-28 05:47:15,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463468946] [2021-12-28 05:47:15,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:47:15,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-28 05:47:15,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:47:15,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-28 05:47:15,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-12-28 05:47:15,485 INFO L87 Difference]: Start difference. First operand 88 states and 91 transitions. Second operand has 33 states, 33 states have (on average 3.909090909090909) internal successors, (129), 33 states have internal predecessors, (129), 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 05:47:15,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:47:15,987 INFO L93 Difference]: Finished difference Result 794 states and 825 transitions. [2021-12-28 05:47:15,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-28 05:47:15,988 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.909090909090909) internal successors, (129), 33 states have internal predecessors, (129), 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 66 [2021-12-28 05:47:15,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:47:15,992 INFO L225 Difference]: With dead ends: 794 [2021-12-28 05:47:15,992 INFO L226 Difference]: Without dead ends: 794 [2021-12-28 05:47:15,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-12-28 05:47:15,993 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1944 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1944 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 05:47:15,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1944 Valid, 502 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 05:47:15,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2021-12-28 05:47:16,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 152. [2021-12-28 05:47:16,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 146 states have (on average 1.0616438356164384) internal successors, (155), 151 states have internal predecessors, (155), 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 05:47:16,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 155 transitions. [2021-12-28 05:47:16,013 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 155 transitions. Word has length 66 [2021-12-28 05:47:16,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:47:16,013 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 155 transitions. [2021-12-28 05:47:16,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.909090909090909) internal successors, (129), 33 states have internal predecessors, (129), 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 05:47:16,014 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 155 transitions. [2021-12-28 05:47:16,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-28 05:47:16,019 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:47:16,019 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:47:16,046 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 05:47:16,235 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 05:47:16,235 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-12-28 05:47:16,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:47:16,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1529191431, now seen corresponding path program 3 times [2021-12-28 05:47:16,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:47:16,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388933533] [2021-12-28 05:47:16,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:47:16,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:47:16,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:47:16,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:47:16,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:47:16,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388933533] [2021-12-28 05:47:16,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388933533] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:47:16,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321755783] [2021-12-28 05:47:16,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-28 05:47:16,765 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:47:16,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:47:16,766 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 05:47:16,768 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 05:47:16,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-28 05:47:16,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:47:16,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-28 05:47:16,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:47:17,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 88 proven. 1 refuted. 0 times theorem prover too weak. 1682 trivial. 0 not checked. [2021-12-28 05:47:17,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:47:17,518 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 25 treesize of output 21 [2021-12-28 05:47:17,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 1682 trivial. 0 not checked. [2021-12-28 05:47:17,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321755783] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:47:17,783 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:47:17,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 7, 7] total 45 [2021-12-28 05:47:17,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435010619] [2021-12-28 05:47:17,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:47:17,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-28 05:47:17,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:47:17,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-28 05:47:17,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=714, Invalid=1266, Unknown=0, NotChecked=0, Total=1980 [2021-12-28 05:47:17,789 INFO L87 Difference]: Start difference. First operand 152 states and 155 transitions. Second operand has 45 states, 45 states have (on average 3.6) internal successors, (162), 45 states have internal predecessors, (162), 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 05:47:20,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:47:20,134 INFO L93 Difference]: Finished difference Result 821 states and 857 transitions. [2021-12-28 05:47:20,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-12-28 05:47:20,134 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.6) internal successors, (162), 45 states have internal predecessors, (162), 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 130 [2021-12-28 05:47:20,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:47:20,137 INFO L225 Difference]: With dead ends: 821 [2021-12-28 05:47:20,137 INFO L226 Difference]: Without dead ends: 821 [2021-12-28 05:47:20,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2133, Invalid=3873, Unknown=0, NotChecked=0, Total=6006 [2021-12-28 05:47:20,140 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 6743 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 622 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6743 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 1193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 622 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-28 05:47:20,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6743 Valid, 398 Invalid, 1193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [622 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-28 05:47:20,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2021-12-28 05:47:20,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 313. [2021-12-28 05:47:20,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 307 states have (on average 1.231270358306189) internal successors, (378), 312 states have internal predecessors, (378), 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 05:47:20,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 378 transitions. [2021-12-28 05:47:20,149 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 378 transitions. Word has length 130 [2021-12-28 05:47:20,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:47:20,149 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 378 transitions. [2021-12-28 05:47:20,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.6) internal successors, (162), 45 states have internal predecessors, (162), 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 05:47:20,150 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 378 transitions. [2021-12-28 05:47:20,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-28 05:47:20,151 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:47:20,151 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:47:20,175 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-28 05:47:20,367 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 05:47:20,368 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-12-28 05:47:20,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:47:20,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1547574073, now seen corresponding path program 1 times [2021-12-28 05:47:20,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:47:20,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135928972] [2021-12-28 05:47:20,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:47:20,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:47:20,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:47:20,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:47:20,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:47:20,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135928972] [2021-12-28 05:47:20,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135928972] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:47:20,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952591291] [2021-12-28 05:47:20,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:47:20,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:47:20,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:47:20,904 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 05:47:20,905 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 05:47:21,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:47:21,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-28 05:47:21,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:47:21,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:47:21,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:47:22,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:47:22,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952591291] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:47:22,693 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:47:22,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 67 [2021-12-28 05:47:22,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803293432] [2021-12-28 05:47:22,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:47:22,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-12-28 05:47:22,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:47:22,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-12-28 05:47:22,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2021-12-28 05:47:22,697 INFO L87 Difference]: Start difference. First operand 313 states and 378 transitions. Second operand has 67 states, 67 states have (on average 3.955223880597015) internal successors, (265), 67 states have internal predecessors, (265), 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 05:47:24,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:47:24,618 INFO L93 Difference]: Finished difference Result 1646 states and 1711 transitions. [2021-12-28 05:47:24,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-12-28 05:47:24,619 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.955223880597015) internal successors, (265), 67 states have internal predecessors, (265), 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 134 [2021-12-28 05:47:24,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:47:24,624 INFO L225 Difference]: With dead ends: 1646 [2021-12-28 05:47:24,624 INFO L226 Difference]: Without dead ends: 1646 [2021-12-28 05:47:24,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2021-12-28 05:47:24,626 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 4964 mSDsluCounter, 1042 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4964 SdHoareTripleChecker+Valid, 1062 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-28 05:47:24,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4964 Valid, 1062 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 696 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-28 05:47:24,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2021-12-28 05:47:24,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 445. [2021-12-28 05:47:24,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 439 states have (on average 1.1617312072892938) internal successors, (510), 444 states have internal predecessors, (510), 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 05:47:24,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 510 transitions. [2021-12-28 05:47:24,639 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 510 transitions. Word has length 134 [2021-12-28 05:47:24,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:47:24,640 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 510 transitions. [2021-12-28 05:47:24,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.955223880597015) internal successors, (265), 67 states have internal predecessors, (265), 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 05:47:24,640 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 510 transitions. [2021-12-28 05:47:24,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2021-12-28 05:47:24,642 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:47:24,643 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:47:24,669 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-28 05:47:24,865 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 05:47:24,866 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-12-28 05:47:24,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:47:24,866 INFO L85 PathProgramCache]: Analyzing trace with hash 964792156, now seen corresponding path program 2 times [2021-12-28 05:47:24,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:47:24,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854140961] [2021-12-28 05:47:24,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:47:24,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:47:24,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:47:26,429 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:47:26,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:47:26,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854140961] [2021-12-28 05:47:26,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854140961] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:47:26,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127410915] [2021-12-28 05:47:26,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 05:47:26,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:47:26,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:47:26,431 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 05:47:26,431 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 05:47:26,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-28 05:47:26,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:47:26,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-28 05:47:26,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:47:28,474 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8128 trivial. 0 not checked. [2021-12-28 05:47:28,474 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 05:47:28,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127410915] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:47:28,474 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 05:47:28,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [67] total 69 [2021-12-28 05:47:28,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595698219] [2021-12-28 05:47:28,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:47:28,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 05:47:28,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:47:28,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 05:47:28,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2215, Invalid=2477, Unknown=0, NotChecked=0, Total=4692 [2021-12-28 05:47:28,477 INFO L87 Difference]: Start difference. First operand 445 states and 510 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 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 05:47:28,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:47:28,483 INFO L93 Difference]: Finished difference Result 447 states and 511 transitions. [2021-12-28 05:47:28,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 05:47:28,484 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 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 266 [2021-12-28 05:47:28,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:47:28,485 INFO L225 Difference]: With dead ends: 447 [2021-12-28 05:47:28,486 INFO L226 Difference]: Without dead ends: 443 [2021-12-28 05:47:28,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2215, Invalid=2477, Unknown=0, NotChecked=0, Total=4692 [2021-12-28 05:47:28,488 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 1 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:47:28,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 60 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 19 Unchecked, 0.0s Time] [2021-12-28 05:47:28,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-12-28 05:47:28,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 443. [2021-12-28 05:47:28,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 437 states have (on average 1.160183066361556) internal successors, (507), 442 states have internal predecessors, (507), 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 05:47:28,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 507 transitions. [2021-12-28 05:47:28,498 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 507 transitions. Word has length 266 [2021-12-28 05:47:28,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:47:28,499 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 507 transitions. [2021-12-28 05:47:28,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 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 05:47:28,499 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 507 transitions. [2021-12-28 05:47:28,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-12-28 05:47:28,501 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:47:28,502 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:47:28,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-28 05:47:28,707 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 05:47:28,708 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-12-28 05:47:28,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:47:28,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1298464006, now seen corresponding path program 1 times [2021-12-28 05:47:28,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:47:28,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856302582] [2021-12-28 05:47:28,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:47:28,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:47:28,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:47:30,425 INFO L134 CoverageAnalysis]: Checked inductivity of 8132 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 05:47:30,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:47:30,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856302582] [2021-12-28 05:47:30,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856302582] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:47:30,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095561464] [2021-12-28 05:47:30,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:47:30,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:47:30,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:47:30,426 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 05:47:30,427 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 05:47:30,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:47:30,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 984 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-28 05:47:30,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:47:31,129 INFO L134 CoverageAnalysis]: Checked inductivity of 8132 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 05:47:31,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:47:35,428 INFO L134 CoverageAnalysis]: Checked inductivity of 8132 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 05:47:35,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095561464] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:47:35,429 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:47:35,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 133 [2021-12-28 05:47:35,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498228084] [2021-12-28 05:47:35,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:47:35,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2021-12-28 05:47:35,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:47:35,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2021-12-28 05:47:35,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8778, Invalid=8778, Unknown=0, NotChecked=0, Total=17556 [2021-12-28 05:47:35,437 INFO L87 Difference]: Start difference. First operand 443 states and 507 transitions. Second operand has 133 states, 133 states have (on average 3.9774436090225564) internal successors, (529), 133 states have internal predecessors, (529), 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 05:47:49,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:47:49,474 INFO L93 Difference]: Finished difference Result 3357 states and 3488 transitions. [2021-12-28 05:47:49,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-12-28 05:47:49,475 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 3.9774436090225564) internal successors, (529), 133 states have internal predecessors, (529), 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 269 [2021-12-28 05:47:49,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:47:49,484 INFO L225 Difference]: With dead ends: 3357 [2021-12-28 05:47:49,485 INFO L226 Difference]: Without dead ends: 3357 [2021-12-28 05:47:49,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 472 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=8778, Invalid=8778, Unknown=0, NotChecked=0, Total=17556 [2021-12-28 05:47:49,489 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 12670 mSDsluCounter, 2102 mSDsCounter, 0 mSdLazyCounter, 1428 mSolverCounterSat, 633 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12670 SdHoareTripleChecker+Valid, 2122 SdHoareTripleChecker+Invalid, 2061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 633 IncrementalHoareTripleChecker+Valid, 1428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-28 05:47:49,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12670 Valid, 2122 Invalid, 2061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [633 Valid, 1428 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-28 05:47:49,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3357 states. [2021-12-28 05:47:49,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3357 to 707. [2021-12-28 05:47:49,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 701 states have (on average 1.0998573466476462) internal successors, (771), 706 states have internal predecessors, (771), 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 05:47:49,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 771 transitions. [2021-12-28 05:47:49,519 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 771 transitions. Word has length 269 [2021-12-28 05:47:49,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:47:49,519 INFO L470 AbstractCegarLoop]: Abstraction has 707 states and 771 transitions. [2021-12-28 05:47:49,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 3.9774436090225564) internal successors, (529), 133 states have internal predecessors, (529), 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 05:47:49,520 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 771 transitions. [2021-12-28 05:47:49,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 534 [2021-12-28 05:47:49,527 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:47:49,527 INFO L514 BasicCegarLoop]: trace histogram [130, 130, 130, 130, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:47:49,552 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 05:47:49,747 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 05:47:49,747 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-12-28 05:47:49,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:47:49,748 INFO L85 PathProgramCache]: Analyzing trace with hash 470641012, now seen corresponding path program 2 times [2021-12-28 05:47:49,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:47:49,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652610523] [2021-12-28 05:47:49,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:47:49,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:47:49,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:47:55,665 INFO L134 CoverageAnalysis]: Checked inductivity of 33674 backedges. 0 proven. 33670 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 05:47:55,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:47:55,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652610523] [2021-12-28 05:47:55,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652610523] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:47:55,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535833769] [2021-12-28 05:47:55,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 05:47:55,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:47:55,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:47:55,666 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 05:47:55,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-28 05:47:55,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-28 05:47:55,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:47:55,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-28 05:47:55,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:47:55,868 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-28 05:47:55,869 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 05:47:55,883 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 05:48:02,276 INFO L134 CoverageAnalysis]: Checked inductivity of 33674 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 33671 trivial. 0 not checked. [2021-12-28 05:48:02,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:48:09,010 INFO L134 CoverageAnalysis]: Checked inductivity of 33674 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 33671 trivial. 0 not checked. [2021-12-28 05:48:09,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535833769] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:48:09,010 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:48:09,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 3, 3] total 137 [2021-12-28 05:48:09,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962895196] [2021-12-28 05:48:09,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:48:09,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2021-12-28 05:48:09,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:48:09,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2021-12-28 05:48:09,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8788, Invalid=9844, Unknown=0, NotChecked=0, Total=18632 [2021-12-28 05:48:09,019 INFO L87 Difference]: Start difference. First operand 707 states and 771 transitions. Second operand has 137 states, 137 states have (on average 4.102189781021898) internal successors, (562), 137 states have internal predecessors, (562), 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)