./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-examples/standard_strcpy_original-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c3fed411 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_original-1.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 25419aae3fa6b25817a0bb63109cdb8dd339b767b8ddb876acb37423139730d4 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 05:48:55,462 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 05:48:55,465 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 05:48:55,496 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 05:48:55,496 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 05:48:55,497 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 05:48:55,498 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 05:48:55,500 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 05:48:55,501 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 05:48:55,502 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 05:48:55,502 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 05:48:55,503 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 05:48:55,503 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 05:48:55,504 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 05:48:55,505 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 05:48:55,506 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 05:48:55,507 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 05:48:55,508 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 05:48:55,509 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 05:48:55,510 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 05:48:55,512 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 05:48:55,516 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 05:48:55,516 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 05:48:55,517 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 05:48:55,519 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 05:48:55,519 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 05:48:55,519 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 05:48:55,520 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 05:48:55,520 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 05:48:55,521 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 05:48:55,521 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 05:48:55,522 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 05:48:55,522 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 05:48:55,523 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 05:48:55,524 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 05:48:55,524 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 05:48:55,525 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 05:48:55,525 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 05:48:55,525 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 05:48:55,526 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 05:48:55,526 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 05:48:55,532 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-16 05:48:55,563 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 05:48:55,563 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 05:48:55,563 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 05:48:55,564 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 05:48:55,564 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 05:48:55,565 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 05:48:55,565 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 05:48:55,565 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 05:48:55,566 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 05:48:55,566 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 05:48:55,567 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 05:48:55,567 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-16 05:48:55,567 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 05:48:55,567 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 05:48:55,568 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 05:48:55,568 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-16 05:48:55,568 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-16 05:48:55,568 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-16 05:48:55,568 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 05:48:55,568 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-16 05:48:55,569 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 05:48:55,569 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 05:48:55,569 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 05:48:55,569 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 05:48:55,569 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 05:48:55,569 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 05:48:55,570 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 05:48:55,571 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 05:48:55,571 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 05:48:55,572 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 05:48:55,572 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 05:48:55,572 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 25419aae3fa6b25817a0bb63109cdb8dd339b767b8ddb876acb37423139730d4 [2021-12-16 05:48:55,764 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 05:48:55,782 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 05:48:55,787 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 05:48:55,788 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 05:48:55,789 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 05:48:55,790 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_strcpy_original-1.i [2021-12-16 05:48:55,862 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0356b2d85/1176f8ffe64749ce96bad9a5f932ee49/FLAGa731246dd [2021-12-16 05:48:56,201 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 05:48:56,202 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_strcpy_original-1.i [2021-12-16 05:48:56,207 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0356b2d85/1176f8ffe64749ce96bad9a5f932ee49/FLAGa731246dd [2021-12-16 05:48:56,621 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0356b2d85/1176f8ffe64749ce96bad9a5f932ee49 [2021-12-16 05:48:56,623 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 05:48:56,625 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 05:48:56,626 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 05:48:56,626 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 05:48:56,629 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 05:48:56,629 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 05:48:56" (1/1) ... [2021-12-16 05:48:56,630 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b54b7c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:48:56, skipping insertion in model container [2021-12-16 05:48:56,631 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 05:48:56" (1/1) ... [2021-12-16 05:48:56,635 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 05:48:56,646 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 05:48:56,776 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_original-1.i[819,832] [2021-12-16 05:48:56,786 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 05:48:56,792 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 05:48:56,800 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_original-1.i[819,832] [2021-12-16 05:48:56,804 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 05:48:56,813 INFO L208 MainTranslator]: Completed translation [2021-12-16 05:48:56,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:48:56 WrapperNode [2021-12-16 05:48:56,814 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 05:48:56,815 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 05:48:56,815 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 05:48:56,815 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 05:48:56,820 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:48:56" (1/1) ... [2021-12-16 05:48:56,825 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:48:56" (1/1) ... [2021-12-16 05:48:56,843 INFO L137 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2021-12-16 05:48:56,843 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 05:48:56,844 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 05:48:56,844 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 05:48:56,844 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 05:48:56,852 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:48:56" (1/1) ... [2021-12-16 05:48:56,852 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:48:56" (1/1) ... [2021-12-16 05:48:56,863 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:48:56" (1/1) ... [2021-12-16 05:48:56,864 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:48:56" (1/1) ... [2021-12-16 05:48:56,875 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:48:56" (1/1) ... [2021-12-16 05:48:56,878 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:48:56" (1/1) ... [2021-12-16 05:48:56,879 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:48:56" (1/1) ... [2021-12-16 05:48:56,880 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 05:48:56,881 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 05:48:56,881 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 05:48:56,881 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 05:48:56,882 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:48:56" (1/1) ... [2021-12-16 05:48:56,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 05:48:56,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:48:56,909 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) [2021-12-16 05:48:56,921 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 [2021-12-16 05:48:56,943 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 05:48:56,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 05:48:56,944 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 05:48:56,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 05:48:56,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 05:48:56,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 05:48:56,945 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 05:48:56,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 05:48:56,999 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 05:48:57,000 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 05:48:57,179 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 05:48:57,190 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 05:48:57,190 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-16 05:48:57,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 05:48:57 BoogieIcfgContainer [2021-12-16 05:48:57,192 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 05:48:57,196 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 05:48:57,197 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 05:48:57,202 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 05:48:57,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 05:48:56" (1/3) ... [2021-12-16 05:48:57,203 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@554a8c17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 05:48:57, skipping insertion in model container [2021-12-16 05:48:57,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:48:56" (2/3) ... [2021-12-16 05:48:57,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@554a8c17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 05:48:57, skipping insertion in model container [2021-12-16 05:48:57,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 05:48:57" (3/3) ... [2021-12-16 05:48:57,205 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_strcpy_original-1.i [2021-12-16 05:48:57,214 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 05:48:57,214 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2021-12-16 05:48:57,267 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 05:48:57,277 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 [2021-12-16 05:48:57,278 INFO L340 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2021-12-16 05:48:57,296 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:57,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-12-16 05:48:57,315 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:57,316 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-12-16 05:48:57,317 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-12-16 05:48:57,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:57,327 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2021-12-16 05:48:57,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:57,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001111175] [2021-12-16 05:48:57,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:57,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:57,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:57,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:48:57,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:57,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001111175] [2021-12-16 05:48:57,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001111175] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:48:57,545 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:48:57,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 05:48:57,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518957616] [2021-12-16 05:48:57,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:48:57,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 05:48:57,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:57,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 05:48:57,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:48:57,583 INFO L87 Difference]: Start difference. First operand has 41 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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) [2021-12-16 05:48:57,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:57,648 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2021-12-16 05:48:57,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 05:48:57,651 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 [2021-12-16 05:48:57,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:57,657 INFO L225 Difference]: With dead ends: 36 [2021-12-16 05:48:57,658 INFO L226 Difference]: Without dead ends: 34 [2021-12-16 05:48:57,660 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 [2021-12-16 05:48:57,664 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 31 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:57,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 24 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:48:57,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-16 05:48:57,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-12-16 05:48:57,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.565217391304348) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:57,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2021-12-16 05:48:57,700 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 4 [2021-12-16 05:48:57,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:57,701 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2021-12-16 05:48:57,701 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) [2021-12-16 05:48:57,701 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2021-12-16 05:48:57,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-12-16 05:48:57,702 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:57,702 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-12-16 05:48:57,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 05:48:57,703 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-12-16 05:48:57,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:57,704 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2021-12-16 05:48:57,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:57,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638625071] [2021-12-16 05:48:57,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:57,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:57,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:57,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:48:57,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:57,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638625071] [2021-12-16 05:48:57,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638625071] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:48:57,783 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:48:57,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 05:48:57,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047685913] [2021-12-16 05:48:57,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:48:57,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 05:48:57,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:57,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 05:48:57,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:48:57,785 INFO L87 Difference]: Start difference. First operand 34 states and 36 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) [2021-12-16 05:48:57,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:57,837 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2021-12-16 05:48:57,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 05:48:57,838 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 [2021-12-16 05:48:57,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:57,839 INFO L225 Difference]: With dead ends: 38 [2021-12-16 05:48:57,839 INFO L226 Difference]: Without dead ends: 38 [2021-12-16 05:48:57,840 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 [2021-12-16 05:48:57,842 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:57,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 45 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:48:57,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-16 05:48:57,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2021-12-16 05:48:57,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 25 states have (on average 1.52) internal successors, (38), 35 states have internal predecessors, (38), 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) [2021-12-16 05:48:57,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2021-12-16 05:48:57,854 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 4 [2021-12-16 05:48:57,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:57,855 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2021-12-16 05:48:57,855 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) [2021-12-16 05:48:57,856 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2021-12-16 05:48:57,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-16 05:48:57,857 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:57,858 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2021-12-16 05:48:57,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 05:48:57,859 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-12-16 05:48:57,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:57,860 INFO L85 PathProgramCache]: Analyzing trace with hash 264435913, now seen corresponding path program 1 times [2021-12-16 05:48:57,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:57,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748986718] [2021-12-16 05:48:57,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:57,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:57,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:57,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:48:57,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:57,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748986718] [2021-12-16 05:48:57,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748986718] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:48:57,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588623272] [2021-12-16 05:48:58,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:58,000 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:58,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:48:58,008 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) [2021-12-16 05:48:58,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 05:48:58,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:58,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-16 05:48:58,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:48:58,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:48:58,143 INFO L388 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 [2021-12-16 05:48:58,150 INFO L388 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 [2021-12-16 05:48:58,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:48:58,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:48:58,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:48:58,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588623272] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:48:58,334 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:48:58,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2021-12-16 05:48:58,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216712273] [2021-12-16 05:48:58,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:48:58,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 05:48:58,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:58,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 05:48:58,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-12-16 05:48:58,336 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:58,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:58,421 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2021-12-16 05:48:58,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 05:48:58,422 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-16 05:48:58,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:58,424 INFO L225 Difference]: With dead ends: 48 [2021-12-16 05:48:58,424 INFO L226 Difference]: Without dead ends: 48 [2021-12-16 05:48:58,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-12-16 05:48:58,426 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 29 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:58,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 39 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:48:58,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-16 05:48:58,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-12-16 05:48:58,430 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) [2021-12-16 05:48:58,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-12-16 05:48:58,431 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 8 [2021-12-16 05:48:58,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:58,431 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-12-16 05:48:58,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:58,432 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-12-16 05:48:58,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-16 05:48:58,432 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:58,432 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-12-16 05:48:58,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 05:48:58,647 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 [2021-12-16 05:48:58,648 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-12-16 05:48:58,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:58,648 INFO L85 PathProgramCache]: Analyzing trace with hash -4646106, now seen corresponding path program 1 times [2021-12-16 05:48:58,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:58,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132067135] [2021-12-16 05:48:58,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:58,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:58,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:58,717 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:58,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:58,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132067135] [2021-12-16 05:48:58,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132067135] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:48:58,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009814496] [2021-12-16 05:48:58,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:58,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:58,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:48:58,720 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) [2021-12-16 05:48:58,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 05:48:58,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:58,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 05:48:58,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:48:58,832 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:48:58,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:48:58,886 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:48:58,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009814496] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:48:58,887 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:48:58,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 11 [2021-12-16 05:48:58,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376605267] [2021-12-16 05:48:58,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:48:58,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-16 05:48:58,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:58,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-16 05:48:58,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2021-12-16 05:48:58,889 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) [2021-12-16 05:48:59,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:59,136 INFO L93 Difference]: Finished difference Result 196 states and 204 transitions. [2021-12-16 05:48:59,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-16 05:48:59,136 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 [2021-12-16 05:48:59,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:59,138 INFO L225 Difference]: With dead ends: 196 [2021-12-16 05:48:59,138 INFO L226 Difference]: Without dead ends: 196 [2021-12-16 05:48:59,139 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 [2021-12-16 05:48:59,139 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 418 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:59,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [418 Valid, 92 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:48:59,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-12-16 05:48:59,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 55. [2021-12-16 05:48:59,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:59,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2021-12-16 05:48:59,147 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 13 [2021-12-16 05:48:59,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:59,147 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2021-12-16 05:48:59,147 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) [2021-12-16 05:48:59,148 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2021-12-16 05:48:59,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-16 05:48:59,148 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:59,148 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1] [2021-12-16 05:48:59,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 05:48:59,363 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 [2021-12-16 05:48:59,363 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-12-16 05:48:59,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:59,364 INFO L85 PathProgramCache]: Analyzing trace with hash -2061457070, now seen corresponding path program 2 times [2021-12-16 05:48:59,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:59,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158967870] [2021-12-16 05:48:59,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:59,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:59,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:59,493 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:48:59,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:59,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158967870] [2021-12-16 05:48:59,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158967870] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:48:59,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939030078] [2021-12-16 05:48:59,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 05:48:59,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:59,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:48:59,500 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) [2021-12-16 05:48:59,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 05:48:59,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 05:48:59,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:48:59,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-16 05:48:59,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:48:59,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:48:59,614 INFO L388 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 [2021-12-16 05:48:59,618 INFO L388 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 [2021-12-16 05:48:59,823 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:48:59,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:49:00,025 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:49:00,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939030078] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:49:00,026 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:49:00,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2021-12-16 05:49:00,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820259895] [2021-12-16 05:49:00,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:49:00,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-16 05:49:00,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:49:00,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-16 05:49:00,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-12-16 05:49:00,028 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 17 states, 16 states have (on average 3.625) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:49:00,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:49:00,309 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2021-12-16 05:49:00,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 05:49:00,310 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.625) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-16 05:49:00,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:49:00,310 INFO L225 Difference]: With dead ends: 76 [2021-12-16 05:49:00,310 INFO L226 Difference]: Without dead ends: 76 [2021-12-16 05:49:00,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=266, Unknown=0, NotChecked=0, Total=420 [2021-12-16 05:49:00,311 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 48 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:49:00,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 124 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:49:00,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-16 05:49:00,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2021-12-16 05:49:00,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 71 states have internal predecessors, (78), 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) [2021-12-16 05:49:00,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 78 transitions. [2021-12-16 05:49:00,316 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 78 transitions. Word has length 20 [2021-12-16 05:49:00,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:49:00,316 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 78 transitions. [2021-12-16 05:49:00,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.625) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:49:00,316 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 78 transitions. [2021-12-16 05:49:00,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-16 05:49:00,317 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:49:00,317 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:49:00,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 05:49:00,531 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 [2021-12-16 05:49:00,532 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-12-16 05:49:00,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:49:00,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1934674516, now seen corresponding path program 1 times [2021-12-16 05:49:00,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:49:00,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676377465] [2021-12-16 05:49:00,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:49:00,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:49:00,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:00,579 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-16 05:49:00,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:49:00,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676377465] [2021-12-16 05:49:00,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676377465] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:49:00,580 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:49:00,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 05:49:00,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030707718] [2021-12-16 05:49:00,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:49:00,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 05:49:00,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:49:00,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 05:49:00,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:49:00,582 INFO L87 Difference]: Start difference. First operand 72 states and 78 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) [2021-12-16 05:49:00,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:49:00,595 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2021-12-16 05:49:00,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 05:49:00,596 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 [2021-12-16 05:49:00,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:49:00,596 INFO L225 Difference]: With dead ends: 70 [2021-12-16 05:49:00,597 INFO L226 Difference]: Without dead ends: 70 [2021-12-16 05:49:00,597 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 [2021-12-16 05:49:00,598 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 19 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:49:00,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 22 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:49:00,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-16 05:49:00,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-12-16 05:49:00,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 69 states have internal predecessors, (76), 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) [2021-12-16 05:49:00,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2021-12-16 05:49:00,603 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 32 [2021-12-16 05:49:00,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:49:00,604 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2021-12-16 05:49:00,604 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) [2021-12-16 05:49:00,604 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2021-12-16 05:49:00,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-16 05:49:00,605 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:49:00,605 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:49:00,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-16 05:49:00,605 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-12-16 05:49:00,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:49:00,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1934674515, now seen corresponding path program 1 times [2021-12-16 05:49:00,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:49:00,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497978225] [2021-12-16 05:49:00,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:49:00,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:49:00,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:00,689 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-16 05:49:00,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:49:00,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497978225] [2021-12-16 05:49:00,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497978225] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:49:00,690 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:49:00,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 05:49:00,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542489459] [2021-12-16 05:49:00,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:49:00,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:49:00,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:49:00,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:49:00,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:49:00,692 INFO L87 Difference]: Start difference. First operand 70 states and 76 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) [2021-12-16 05:49:00,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:49:00,726 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2021-12-16 05:49:00,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 05:49:00,727 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 [2021-12-16 05:49:00,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:49:00,728 INFO L225 Difference]: With dead ends: 84 [2021-12-16 05:49:00,728 INFO L226 Difference]: Without dead ends: 84 [2021-12-16 05:49:00,728 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 [2021-12-16 05:49:00,729 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 52 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:49:00,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 25 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:49:00,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-12-16 05:49:00,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 75. [2021-12-16 05:49:00,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 68 states have (on average 1.2205882352941178) internal successors, (83), 74 states have internal predecessors, (83), 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) [2021-12-16 05:49:00,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 83 transitions. [2021-12-16 05:49:00,734 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 83 transitions. Word has length 32 [2021-12-16 05:49:00,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:49:00,734 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 83 transitions. [2021-12-16 05:49:00,735 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) [2021-12-16 05:49:00,735 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 83 transitions. [2021-12-16 05:49:00,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-16 05:49:00,739 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:49:00,739 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:49:00,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-16 05:49:00,740 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-12-16 05:49:00,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:49:00,740 INFO L85 PathProgramCache]: Analyzing trace with hash 498629567, now seen corresponding path program 1 times [2021-12-16 05:49:00,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:49:00,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487003423] [2021-12-16 05:49:00,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:49:00,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:49:00,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:00,816 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:49:00,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:49:00,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487003423] [2021-12-16 05:49:00,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487003423] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:49:00,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453078844] [2021-12-16 05:49:00,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:49:00,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:49:00,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:49:00,818 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) [2021-12-16 05:49:00,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 05:49:00,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:00,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 05:49:00,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:49:00,941 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:49:00,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:49:01,082 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:49:01,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453078844] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:49:01,082 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:49:01,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2021-12-16 05:49:01,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805276023] [2021-12-16 05:49:01,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:49:01,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-16 05:49:01,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:49:01,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-16 05:49:01,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-12-16 05:49:01,084 INFO L87 Difference]: Start difference. First operand 75 states and 83 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) [2021-12-16 05:49:01,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:49:01,395 INFO L93 Difference]: Finished difference Result 390 states and 406 transitions. [2021-12-16 05:49:01,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-16 05:49:01,396 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 [2021-12-16 05:49:01,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:49:01,397 INFO L225 Difference]: With dead ends: 390 [2021-12-16 05:49:01,397 INFO L226 Difference]: Without dead ends: 390 [2021-12-16 05:49:01,398 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 [2021-12-16 05:49:01,398 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 821 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 821 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 05:49:01,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [821 Valid, 183 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 05:49:01,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-12-16 05:49:01,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 90. [2021-12-16 05:49:01,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 83 states have (on average 1.1686746987951808) internal successors, (97), 89 states have internal predecessors, (97), 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) [2021-12-16 05:49:01,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 97 transitions. [2021-12-16 05:49:01,406 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 97 transitions. Word has length 34 [2021-12-16 05:49:01,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:49:01,407 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 97 transitions. [2021-12-16 05:49:01,407 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) [2021-12-16 05:49:01,407 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 97 transitions. [2021-12-16 05:49:01,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-16 05:49:01,408 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:49:01,408 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1] [2021-12-16 05:49:01,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 05:49:01,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:49:01,624 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-12-16 05:49:01,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:49:01,625 INFO L85 PathProgramCache]: Analyzing trace with hash -256132636, now seen corresponding path program 3 times [2021-12-16 05:49:01,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:49:01,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177529603] [2021-12-16 05:49:01,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:49:01,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:49:01,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:01,912 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:49:01,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:49:01,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177529603] [2021-12-16 05:49:01,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177529603] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:49:01,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893886473] [2021-12-16 05:49:01,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 05:49:01,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:49:01,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:49:01,915 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) [2021-12-16 05:49:01,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 05:49:01,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-16 05:49:01,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:49:01,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-16 05:49:01,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:49:01,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:49:01,995 INFO L388 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 [2021-12-16 05:49:01,999 INFO L388 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 [2021-12-16 05:49:02,264 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-12-16 05:49:02,264 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:49:02,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893886473] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:49:02,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 05:49:02,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 16 [2021-12-16 05:49:02,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121169439] [2021-12-16 05:49:02,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:49:02,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 05:49:02,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:49:02,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 05:49:02,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-12-16 05:49:02,267 INFO L87 Difference]: Start difference. First operand 90 states and 97 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:49:02,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:49:02,319 INFO L93 Difference]: Finished difference Result 98 states and 102 transitions. [2021-12-16 05:49:02,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 05:49:02,320 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-12-16 05:49:02,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:49:02,321 INFO L225 Difference]: With dead ends: 98 [2021-12-16 05:49:02,321 INFO L226 Difference]: Without dead ends: 98 [2021-12-16 05:49:02,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-12-16 05:49:02,322 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 53 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:49:02,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 43 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:49:02,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-12-16 05:49:02,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 89. [2021-12-16 05:49:02,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 83 states have (on average 1.1204819277108433) internal successors, (93), 88 states have internal predecessors, (93), 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) [2021-12-16 05:49:02,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2021-12-16 05:49:02,327 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 44 [2021-12-16 05:49:02,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:49:02,327 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2021-12-16 05:49:02,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:49:02,328 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2021-12-16 05:49:02,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-16 05:49:02,329 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:49:02,329 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:49:02,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-16 05:49:02,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:49:02,544 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-12-16 05:49:02,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:49:02,544 INFO L85 PathProgramCache]: Analyzing trace with hash -618447913, now seen corresponding path program 2 times [2021-12-16 05:49:02,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:49:02,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713783042] [2021-12-16 05:49:02,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:49:02,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:49:02,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:02,730 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:49:02,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:49:02,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713783042] [2021-12-16 05:49:02,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713783042] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:49:02,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672470946] [2021-12-16 05:49:02,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 05:49:02,731 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:49:02,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:49:02,733 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) [2021-12-16 05:49:02,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 05:49:02,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 05:49:02,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:49:02,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-16 05:49:02,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:49:02,949 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:49:02,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:49:03,324 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:49:03,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672470946] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:49:03,324 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:49:03,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2021-12-16 05:49:03,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423160606] [2021-12-16 05:49:03,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:49:03,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-16 05:49:03,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:49:03,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-16 05:49:03,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-12-16 05:49:03,326 INFO L87 Difference]: Start difference. First operand 89 states and 93 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) [2021-12-16 05:49:04,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:49:04,031 INFO L93 Difference]: Finished difference Result 802 states and 834 transitions. [2021-12-16 05:49:04,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-16 05:49:04,032 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 [2021-12-16 05:49:04,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:49:04,038 INFO L225 Difference]: With dead ends: 802 [2021-12-16 05:49:04,038 INFO L226 Difference]: Without dead ends: 802 [2021-12-16 05:49:04,039 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 [2021-12-16 05:49:04,039 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 2063 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2063 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-16 05:49:04,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2063 Valid, 348 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [302 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-16 05:49:04,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2021-12-16 05:49:04,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 153. [2021-12-16 05:49:04,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 147 states have (on average 1.0680272108843538) internal successors, (157), 152 states have internal predecessors, (157), 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) [2021-12-16 05:49:04,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 157 transitions. [2021-12-16 05:49:04,048 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 157 transitions. Word has length 66 [2021-12-16 05:49:04,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:49:04,049 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 157 transitions. [2021-12-16 05:49:04,049 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) [2021-12-16 05:49:04,049 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 157 transitions. [2021-12-16 05:49:04,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-16 05:49:04,052 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:49:04,052 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:49:04,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-16 05:49:04,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:49:04,268 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-12-16 05:49:04,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:49:04,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1529191431, now seen corresponding path program 3 times [2021-12-16 05:49:04,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:49:04,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318390533] [2021-12-16 05:49:04,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:49:04,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:49:04,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:04,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:49:04,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:49:04,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318390533] [2021-12-16 05:49:04,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318390533] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:49:04,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158034303] [2021-12-16 05:49:04,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 05:49:04,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:49:04,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:49:04,818 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) [2021-12-16 05:49:04,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-16 05:49:04,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-16 05:49:04,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:49:04,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-16 05:49:04,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:49:05,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 88 proven. 1 refuted. 0 times theorem prover too weak. 1682 trivial. 0 not checked. [2021-12-16 05:49:05,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:49:05,435 INFO L388 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 24 treesize of output 20 [2021-12-16 05:49:05,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 1682 trivial. 0 not checked. [2021-12-16 05:49:05,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158034303] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:49:05,675 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:49:05,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 7, 7] total 45 [2021-12-16 05:49:05,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187591685] [2021-12-16 05:49:05,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:49:05,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-16 05:49:05,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:49:05,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-16 05:49:05,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=714, Invalid=1266, Unknown=0, NotChecked=0, Total=1980 [2021-12-16 05:49:05,679 INFO L87 Difference]: Start difference. First operand 153 states and 157 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) [2021-12-16 05:49:07,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:49:07,977 INFO L93 Difference]: Finished difference Result 799 states and 836 transitions. [2021-12-16 05:49:07,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-12-16 05:49:07,978 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 [2021-12-16 05:49:07,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:49:07,981 INFO L225 Difference]: With dead ends: 799 [2021-12-16 05:49:07,981 INFO L226 Difference]: Without dead ends: 799 [2021-12-16 05:49:07,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2133, Invalid=3873, Unknown=0, NotChecked=0, Total=6006 [2021-12-16 05:49:07,984 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 4558 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 1025 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4558 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 1579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1025 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-16 05:49:07,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4558 Valid, 371 Invalid, 1579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1025 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-16 05:49:07,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2021-12-16 05:49:07,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 536. [2021-12-16 05:49:07,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 530 states have (on average 1.3132075471698113) internal successors, (696), 535 states have internal predecessors, (696), 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) [2021-12-16 05:49:07,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 696 transitions. [2021-12-16 05:49:07,997 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 696 transitions. Word has length 130 [2021-12-16 05:49:07,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:49:07,998 INFO L470 AbstractCegarLoop]: Abstraction has 536 states and 696 transitions. [2021-12-16 05:49:07,998 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) [2021-12-16 05:49:07,998 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 696 transitions. [2021-12-16 05:49:08,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-16 05:49:08,000 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:49:08,000 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:49:08,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-16 05:49:08,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:49:08,216 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-12-16 05:49:08,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:49:08,216 INFO L85 PathProgramCache]: Analyzing trace with hash 730106113, now seen corresponding path program 1 times [2021-12-16 05:49:08,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:49:08,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967193064] [2021-12-16 05:49:08,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:49:08,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:49:08,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:08,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:49:08,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:49:08,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967193064] [2021-12-16 05:49:08,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967193064] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:49:08,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012020339] [2021-12-16 05:49:08,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:49:08,769 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:49:08,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:49:08,772 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) [2021-12-16 05:49:08,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-16 05:49:08,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:08,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-16 05:49:08,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:49:09,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:49:09,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:49:10,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:49:10,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012020339] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:49:10,535 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:49:10,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 67 [2021-12-16 05:49:10,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879123223] [2021-12-16 05:49:10,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:49:10,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-12-16 05:49:10,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:49:10,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-12-16 05:49:10,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2021-12-16 05:49:10,538 INFO L87 Difference]: Start difference. First operand 536 states and 696 transitions. Second operand has 67 states, 67 states have (on average 3.970149253731343) internal successors, (266), 67 states have internal predecessors, (266), 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) [2021-12-16 05:49:12,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:49:12,669 INFO L93 Difference]: Finished difference Result 1622 states and 1688 transitions. [2021-12-16 05:49:12,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-12-16 05:49:12,670 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.970149253731343) internal successors, (266), 67 states have internal predecessors, (266), 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 135 [2021-12-16 05:49:12,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:49:12,675 INFO L225 Difference]: With dead ends: 1622 [2021-12-16 05:49:12,675 INFO L226 Difference]: Without dead ends: 1622 [2021-12-16 05:49:12,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2021-12-16 05:49:12,677 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 4848 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 776 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4848 SdHoareTripleChecker+Valid, 723 SdHoareTripleChecker+Invalid, 1697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 776 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-16 05:49:12,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4848 Valid, 723 Invalid, 1697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [776 Valid, 921 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-16 05:49:12,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2021-12-16 05:49:12,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 668. [2021-12-16 05:49:12,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 662 states have (on average 1.2507552870090635) internal successors, (828), 667 states have internal predecessors, (828), 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) [2021-12-16 05:49:12,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 828 transitions. [2021-12-16 05:49:12,705 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 828 transitions. Word has length 135 [2021-12-16 05:49:12,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:49:12,705 INFO L470 AbstractCegarLoop]: Abstraction has 668 states and 828 transitions. [2021-12-16 05:49:12,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.970149253731343) internal successors, (266), 67 states have internal predecessors, (266), 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) [2021-12-16 05:49:12,706 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 828 transitions. [2021-12-16 05:49:12,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2021-12-16 05:49:12,709 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:49:12,709 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:49:12,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-16 05:49:12,909 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,SelfDestructingSolverStorable11 [2021-12-16 05:49:12,910 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-12-16 05:49:12,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:49:12,910 INFO L85 PathProgramCache]: Analyzing trace with hash -156264130, now seen corresponding path program 2 times [2021-12-16 05:49:12,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:49:12,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822758702] [2021-12-16 05:49:12,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:49:12,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:49:12,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:14,491 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:49:14,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:49:14,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822758702] [2021-12-16 05:49:14,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822758702] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:49:14,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979072682] [2021-12-16 05:49:14,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 05:49:14,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:49:14,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:49:14,499 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) [2021-12-16 05:49:14,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-16 05:49:14,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-16 05:49:14,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:49:14,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-16 05:49:14,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:49:16,615 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8128 trivial. 0 not checked. [2021-12-16 05:49:16,616 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:49:16,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979072682] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:49:16,616 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 05:49:16,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [67] total 69 [2021-12-16 05:49:16,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215185543] [2021-12-16 05:49:16,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:49:16,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:49:16,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:49:16,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:49:16,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2215, Invalid=2477, Unknown=0, NotChecked=0, Total=4692 [2021-12-16 05:49:16,619 INFO L87 Difference]: Start difference. First operand 668 states and 828 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2021-12-16 05:49:16,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:49:16,623 INFO L93 Difference]: Finished difference Result 674 states and 834 transitions. [2021-12-16 05:49:16,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 05:49:16,624 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 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 267 [2021-12-16 05:49:16,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:49:16,629 INFO L225 Difference]: With dead ends: 674 [2021-12-16 05:49:16,629 INFO L226 Difference]: Without dead ends: 672 [2021-12-16 05:49:16,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2215, Invalid=2477, Unknown=0, NotChecked=0, Total=4692 [2021-12-16 05:49:16,632 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 2 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 56 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 [2021-12-16 05:49:16,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 56 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 19 Unchecked, 0.0s Time] [2021-12-16 05:49:16,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-12-16 05:49:16,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 671. [2021-12-16 05:49:16,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 665 states have (on average 1.2496240601503759) internal successors, (831), 670 states have internal predecessors, (831), 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) [2021-12-16 05:49:16,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 831 transitions. [2021-12-16 05:49:16,646 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 831 transitions. Word has length 267 [2021-12-16 05:49:16,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:49:16,647 INFO L470 AbstractCegarLoop]: Abstraction has 671 states and 831 transitions. [2021-12-16 05:49:16,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2021-12-16 05:49:16,647 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 831 transitions. [2021-12-16 05:49:16,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-12-16 05:49:16,650 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:49:16,650 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:49:16,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-16 05:49:16,863 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,SelfDestructingSolverStorable12 [2021-12-16 05:49:16,863 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-12-16 05:49:16,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:49:16,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1298464006, now seen corresponding path program 1 times [2021-12-16 05:49:16,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:49:16,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672205669] [2021-12-16 05:49:16,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:49:16,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:49:16,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:18,518 INFO L134 CoverageAnalysis]: Checked inductivity of 8132 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 05:49:18,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:49:18,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672205669] [2021-12-16 05:49:18,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672205669] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:49:18,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201679555] [2021-12-16 05:49:18,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:49:18,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:49:18,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:49:18,520 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) [2021-12-16 05:49:18,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-16 05:49:18,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:18,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 984 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-16 05:49:18,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:49:19,184 INFO L134 CoverageAnalysis]: Checked inductivity of 8132 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 05:49:19,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:49:23,400 INFO L134 CoverageAnalysis]: Checked inductivity of 8132 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 05:49:23,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201679555] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:49:23,401 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:49:23,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 133 [2021-12-16 05:49:23,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935642499] [2021-12-16 05:49:23,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:49:23,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2021-12-16 05:49:23,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:49:23,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2021-12-16 05:49:23,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8778, Invalid=8778, Unknown=0, NotChecked=0, Total=17556 [2021-12-16 05:49:23,408 INFO L87 Difference]: Start difference. First operand 671 states and 831 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) [2021-12-16 05:49:41,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:49:41,659 INFO L93 Difference]: Finished difference Result 3340 states and 3472 transitions. [2021-12-16 05:49:41,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-12-16 05:49:41,659 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 [2021-12-16 05:49:41,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:49:41,671 INFO L225 Difference]: With dead ends: 3340 [2021-12-16 05:49:41,672 INFO L226 Difference]: Without dead ends: 3340 [2021-12-16 05:49:41,676 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 [2021-12-16 05:49:41,677 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 9522 mSDsluCounter, 1450 mSDsCounter, 0 mSdLazyCounter, 1926 mSolverCounterSat, 1926 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9522 SdHoareTripleChecker+Valid, 1466 SdHoareTripleChecker+Invalid, 3852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1926 IncrementalHoareTripleChecker+Valid, 1926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-16 05:49:41,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9522 Valid, 1466 Invalid, 3852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1926 Valid, 1926 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-16 05:49:41,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3340 states. [2021-12-16 05:49:41,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3340 to 935. [2021-12-16 05:49:41,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 935 states, 929 states have (on average 1.178686759956943) internal successors, (1095), 934 states have internal predecessors, (1095), 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) [2021-12-16 05:49:41,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 935 states to 935 states and 1095 transitions. [2021-12-16 05:49:41,700 INFO L78 Accepts]: Start accepts. Automaton has 935 states and 1095 transitions. Word has length 269 [2021-12-16 05:49:41,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:49:41,700 INFO L470 AbstractCegarLoop]: Abstraction has 935 states and 1095 transitions. [2021-12-16 05:49:41,701 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) [2021-12-16 05:49:41,701 INFO L276 IsEmpty]: Start isEmpty. Operand 935 states and 1095 transitions. [2021-12-16 05:49:41,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 534 [2021-12-16 05:49:41,708 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:49:41,708 INFO L514 BasicCegarLoop]: trace histogram [130, 130, 130, 130, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:49:41,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-16 05:49:41,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-16 05:49:41,915 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-12-16 05:49:41,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:49:41,916 INFO L85 PathProgramCache]: Analyzing trace with hash 470641012, now seen corresponding path program 2 times [2021-12-16 05:49:41,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:49:41,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588176839] [2021-12-16 05:49:41,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:49:41,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:49:42,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:47,696 INFO L134 CoverageAnalysis]: Checked inductivity of 33674 backedges. 0 proven. 33670 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 05:49:47,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:49:47,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588176839] [2021-12-16 05:49:47,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588176839] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:49:47,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001844869] [2021-12-16 05:49:47,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 05:49:47,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:49:47,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:49:47,698 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:49:47,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-16 05:49:47,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-16 05:49:47,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:49:47,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-16 05:49:47,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:49:47,883 INFO L388 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 [2021-12-16 05:49:47,889 INFO L388 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 [2021-12-16 05:49:55,565 INFO L134 CoverageAnalysis]: Checked inductivity of 33674 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 33671 trivial. 0 not checked. [2021-12-16 05:49:55,565 INFO L328 TraceCheckSpWp]: Computing backward predicates...