./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/openbsd_cstpcpy-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3a877d22 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-memsafety/openbsd_cstpcpy-alloca-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 f22afdea3888c472e42c0b4bee511704d4ceb9c1e2d9f4db0ce5ffbd6de758f0 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 13:57:05,693 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 13:57:05,694 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 13:57:05,729 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 13:57:05,730 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 13:57:05,732 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 13:57:05,734 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 13:57:05,736 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 13:57:05,737 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 13:57:05,740 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 13:57:05,740 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 13:57:05,741 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 13:57:05,742 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 13:57:05,743 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 13:57:05,745 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 13:57:05,747 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 13:57:05,748 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 13:57:05,748 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 13:57:05,751 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 13:57:05,755 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 13:57:05,756 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 13:57:05,756 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 13:57:05,757 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 13:57:05,758 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 13:57:05,763 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 13:57:05,763 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 13:57:05,763 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 13:57:05,764 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 13:57:05,765 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 13:57:05,765 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 13:57:05,766 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 13:57:05,766 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 13:57:05,767 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 13:57:05,768 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 13:57:05,769 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 13:57:05,769 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 13:57:05,769 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 13:57:05,770 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 13:57:05,770 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 13:57:05,770 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 13:57:05,771 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 13:57:05,772 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-15 13:57:05,787 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 13:57:05,787 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 13:57:05,788 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 13:57:05,788 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 13:57:05,788 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 13:57:05,788 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 13:57:05,789 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 13:57:05,789 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 13:57:05,789 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 13:57:05,789 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 13:57:05,789 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 13:57:05,789 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-15 13:57:05,789 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 13:57:05,789 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 13:57:05,789 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 13:57:05,789 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-15 13:57:05,789 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-15 13:57:05,789 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-15 13:57:05,789 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 13:57:05,790 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-15 13:57:05,790 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 13:57:05,790 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 13:57:05,790 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 13:57:05,790 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 13:57:05,790 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 13:57:05,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 13:57:05,790 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 13:57:05,790 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 13:57:05,790 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 13:57:05,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 13:57:05,790 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 13:57:05,791 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f22afdea3888c472e42c0b4bee511704d4ceb9c1e2d9f4db0ce5ffbd6de758f0 [2021-12-15 13:57:05,992 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 13:57:06,014 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 13:57:06,016 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 13:57:06,018 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 13:57:06,019 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 13:57:06,020 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cstpcpy-alloca-1.i [2021-12-15 13:57:06,087 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/738aa34fc/86e83476ec6647038d66bc2a75544f09/FLAG5f72ef8f7 [2021-12-15 13:57:06,487 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 13:57:06,487 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstpcpy-alloca-1.i [2021-12-15 13:57:06,498 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/738aa34fc/86e83476ec6647038d66bc2a75544f09/FLAG5f72ef8f7 [2021-12-15 13:57:06,507 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/738aa34fc/86e83476ec6647038d66bc2a75544f09 [2021-12-15 13:57:06,509 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 13:57:06,511 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 13:57:06,512 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 13:57:06,512 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 13:57:06,519 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 13:57:06,520 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 01:57:06" (1/1) ... [2021-12-15 13:57:06,520 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26a4499f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:57:06, skipping insertion in model container [2021-12-15 13:57:06,521 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 01:57:06" (1/1) ... [2021-12-15 13:57:06,525 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 13:57:06,553 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 13:57:06,766 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 13:57:06,772 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 13:57:06,795 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 13:57:06,830 INFO L208 MainTranslator]: Completed translation [2021-12-15 13:57:06,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:57:06 WrapperNode [2021-12-15 13:57:06,830 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 13:57:06,831 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 13:57:06,831 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 13:57:06,831 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 13:57:06,837 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:57:06" (1/1) ... [2021-12-15 13:57:06,856 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:57:06" (1/1) ... [2021-12-15 13:57:06,875 INFO L137 Inliner]: procedures = 117, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2021-12-15 13:57:06,877 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 13:57:06,877 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 13:57:06,877 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 13:57:06,877 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 13:57:06,882 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:57:06" (1/1) ... [2021-12-15 13:57:06,883 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:57:06" (1/1) ... [2021-12-15 13:57:06,884 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:57:06" (1/1) ... [2021-12-15 13:57:06,884 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:57:06" (1/1) ... [2021-12-15 13:57:06,888 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:57:06" (1/1) ... [2021-12-15 13:57:06,890 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:57:06" (1/1) ... [2021-12-15 13:57:06,891 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:57:06" (1/1) ... [2021-12-15 13:57:06,892 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 13:57:06,893 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 13:57:06,893 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 13:57:06,893 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 13:57:06,894 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:57:06" (1/1) ... [2021-12-15 13:57:06,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 13:57:06,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:06,944 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) [2021-12-15 13:57:06,962 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 [2021-12-15 13:57:06,988 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-15 13:57:06,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 13:57:06,989 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-15 13:57:06,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-15 13:57:06,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 13:57:06,990 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 13:57:07,048 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 13:57:07,049 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 13:57:07,135 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 13:57:07,140 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 13:57:07,140 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-15 13:57:07,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 01:57:07 BoogieIcfgContainer [2021-12-15 13:57:07,142 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 13:57:07,143 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 13:57:07,143 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 13:57:07,145 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 13:57:07,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 01:57:06" (1/3) ... [2021-12-15 13:57:07,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ff003cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 01:57:07, skipping insertion in model container [2021-12-15 13:57:07,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:57:06" (2/3) ... [2021-12-15 13:57:07,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ff003cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 01:57:07, skipping insertion in model container [2021-12-15 13:57:07,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 01:57:07" (3/3) ... [2021-12-15 13:57:07,148 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstpcpy-alloca-1.i [2021-12-15 13:57:07,151 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 13:57:07,152 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2021-12-15 13:57:07,180 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 13:57:07,185 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 [2021-12-15 13:57:07,185 INFO L340 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2021-12-15 13:57:07,195 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 28 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) [2021-12-15 13:57:07,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-15 13:57:07,199 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:07,200 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-15 13:57:07,200 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 13:57:07,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:07,204 INFO L85 PathProgramCache]: Analyzing trace with hash 889510840, now seen corresponding path program 1 times [2021-12-15 13:57:07,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:07,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941109562] [2021-12-15 13:57:07,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:07,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:07,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:07,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:07,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:07,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941109562] [2021-12-15 13:57:07,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941109562] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:57:07,339 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:57:07,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 13:57:07,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905214291] [2021-12-15 13:57:07,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:57:07,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 13:57:07,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:07,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 13:57:07,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 13:57:07,371 INFO L87 Difference]: Start difference. First operand has 29 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 28 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) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:07,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:07,432 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-12-15 13:57:07,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 13:57:07,435 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-15 13:57:07,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:07,440 INFO L225 Difference]: With dead ends: 34 [2021-12-15 13:57:07,440 INFO L226 Difference]: Without dead ends: 30 [2021-12-15 13:57:07,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 13:57:07,449 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 56 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:07,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 35 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:57:07,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-15 13:57:07,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2021-12-15 13:57:07,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 27 states have internal predecessors, (32), 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) [2021-12-15 13:57:07,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-12-15 13:57:07,489 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 6 [2021-12-15 13:57:07,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:07,490 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-12-15 13:57:07,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:07,491 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-12-15 13:57:07,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-15 13:57:07,491 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:07,492 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-15 13:57:07,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 13:57:07,492 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 13:57:07,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:07,495 INFO L85 PathProgramCache]: Analyzing trace with hash 889512762, now seen corresponding path program 1 times [2021-12-15 13:57:07,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:07,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590571763] [2021-12-15 13:57:07,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:07,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:07,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:07,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:07,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:07,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590571763] [2021-12-15 13:57:07,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590571763] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:57:07,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:57:07,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 13:57:07,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81536821] [2021-12-15 13:57:07,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:57:07,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 13:57:07,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:07,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 13:57:07,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 13:57:07,541 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:07,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:07,566 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2021-12-15 13:57:07,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 13:57:07,567 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-15 13:57:07,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:07,569 INFO L225 Difference]: With dead ends: 29 [2021-12-15 13:57:07,569 INFO L226 Difference]: Without dead ends: 28 [2021-12-15 13:57:07,570 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 [2021-12-15 13:57:07,575 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 2 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:07,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 43 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:57:07,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-15 13:57:07,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-12-15 13:57:07,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 26 states have internal predecessors, (30), 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) [2021-12-15 13:57:07,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-12-15 13:57:07,578 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 6 [2021-12-15 13:57:07,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:07,579 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-12-15 13:57:07,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:07,579 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-12-15 13:57:07,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-15 13:57:07,579 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:07,579 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:07,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 13:57:07,579 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 13:57:07,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:07,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1805033015, now seen corresponding path program 1 times [2021-12-15 13:57:07,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:07,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823372604] [2021-12-15 13:57:07,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:07,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:07,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:07,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:07,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:07,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823372604] [2021-12-15 13:57:07,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823372604] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:57:07,647 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:57:07,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 13:57:07,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39074377] [2021-12-15 13:57:07,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:57:07,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 13:57:07,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:07,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 13:57:07,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 13:57:07,649 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) [2021-12-15 13:57:07,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:07,676 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2021-12-15 13:57:07,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 13:57:07,676 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 7 [2021-12-15 13:57:07,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:07,677 INFO L225 Difference]: With dead ends: 33 [2021-12-15 13:57:07,677 INFO L226 Difference]: Without dead ends: 33 [2021-12-15 13:57:07,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 13:57:07,678 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 34 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:07,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 41 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:57:07,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-15 13:57:07,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2021-12-15 13:57:07,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.631578947368421) internal successors, (31), 27 states have internal predecessors, (31), 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) [2021-12-15 13:57:07,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-12-15 13:57:07,681 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 7 [2021-12-15 13:57:07,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:07,682 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-12-15 13:57:07,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) [2021-12-15 13:57:07,682 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-12-15 13:57:07,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-15 13:57:07,682 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:07,682 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:07,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 13:57:07,683 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 13:57:07,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:07,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1805033068, now seen corresponding path program 1 times [2021-12-15 13:57:07,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:07,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974090301] [2021-12-15 13:57:07,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:07,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:07,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:07,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:07,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:07,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974090301] [2021-12-15 13:57:07,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974090301] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:57:07,732 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:57:07,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 13:57:07,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624694427] [2021-12-15 13:57:07,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:57:07,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 13:57:07,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:07,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 13:57:07,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 13:57:07,734 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 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) [2021-12-15 13:57:07,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:07,796 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2021-12-15 13:57:07,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 13:57:07,796 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 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 7 [2021-12-15 13:57:07,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:07,797 INFO L225 Difference]: With dead ends: 48 [2021-12-15 13:57:07,797 INFO L226 Difference]: Without dead ends: 48 [2021-12-15 13:57:07,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 13:57:07,799 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 40 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:07,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 41 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:57:07,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-15 13:57:07,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 26. [2021-12-15 13:57:07,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 25 states have internal predecessors, (29), 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) [2021-12-15 13:57:07,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-12-15 13:57:07,808 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 7 [2021-12-15 13:57:07,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:07,809 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-12-15 13:57:07,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 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) [2021-12-15 13:57:07,809 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-12-15 13:57:07,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-15 13:57:07,809 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:07,810 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:07,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 13:57:07,810 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 13:57:07,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:07,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1805033069, now seen corresponding path program 1 times [2021-12-15 13:57:07,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:07,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019187133] [2021-12-15 13:57:07,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:07,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:07,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:07,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:07,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:07,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019187133] [2021-12-15 13:57:07,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019187133] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:57:07,846 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:57:07,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 13:57:07,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041057011] [2021-12-15 13:57:07,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:57:07,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 13:57:07,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:07,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 13:57:07,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 13:57:07,848 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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) [2021-12-15 13:57:07,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:07,871 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2021-12-15 13:57:07,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 13:57:07,872 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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 7 [2021-12-15 13:57:07,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:07,872 INFO L225 Difference]: With dead ends: 29 [2021-12-15 13:57:07,872 INFO L226 Difference]: Without dead ends: 29 [2021-12-15 13:57:07,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 13:57:07,873 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 27 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:07,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 38 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:57:07,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-15 13:57:07,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2021-12-15 13:57:07,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 20 states have (on average 1.5) internal successors, (30), 26 states have internal predecessors, (30), 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) [2021-12-15 13:57:07,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-12-15 13:57:07,876 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 7 [2021-12-15 13:57:07,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:07,877 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-12-15 13:57:07,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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) [2021-12-15 13:57:07,877 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-12-15 13:57:07,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-15 13:57:07,877 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:07,877 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:07,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 13:57:07,878 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 13:57:07,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:07,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1762264955, now seen corresponding path program 1 times [2021-12-15 13:57:07,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:07,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679226514] [2021-12-15 13:57:07,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:07,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:07,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:07,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:07,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:07,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679226514] [2021-12-15 13:57:07,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679226514] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:07,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570877194] [2021-12-15 13:57:07,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:07,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:07,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:07,960 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) [2021-12-15 13:57:07,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 13:57:08,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:08,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-15 13:57:08,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:08,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:08,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:08,255 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 22 treesize of output 18 [2021-12-15 13:57:08,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:08,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570877194] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:08,365 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:08,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2021-12-15 13:57:08,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530691861] [2021-12-15 13:57:08,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:08,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-15 13:57:08,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:08,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-15 13:57:08,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-12-15 13:57:08,367 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 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) [2021-12-15 13:57:08,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:08,453 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2021-12-15 13:57:08,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 13:57:08,454 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-15 13:57:08,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:08,454 INFO L225 Difference]: With dead ends: 48 [2021-12-15 13:57:08,454 INFO L226 Difference]: Without dead ends: 48 [2021-12-15 13:57:08,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-12-15 13:57:08,455 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 94 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:08,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 81 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:57:08,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-15 13:57:08,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 34. [2021-12-15 13:57:08,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 33 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) [2021-12-15 13:57:08,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-12-15 13:57:08,458 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 11 [2021-12-15 13:57:08,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:08,459 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-12-15 13:57:08,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 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) [2021-12-15 13:57:08,459 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-12-15 13:57:08,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-15 13:57:08,460 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:08,460 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:08,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 13:57:08,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-15 13:57:08,676 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 13:57:08,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:08,676 INFO L85 PathProgramCache]: Analyzing trace with hash 952918329, now seen corresponding path program 1 times [2021-12-15 13:57:08,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:08,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990517910] [2021-12-15 13:57:08,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:08,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:08,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:08,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:08,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:08,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990517910] [2021-12-15 13:57:08,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990517910] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:08,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717628892] [2021-12-15 13:57:08,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:08,759 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:08,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:08,760 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) [2021-12-15 13:57:08,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 13:57:08,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:08,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-15 13:57:08,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:08,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:08,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:08,914 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 22 treesize of output 18 [2021-12-15 13:57:08,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:08,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717628892] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:08,985 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:08,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2021-12-15 13:57:08,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666491937] [2021-12-15 13:57:08,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:08,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-15 13:57:08,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:08,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-15 13:57:08,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-12-15 13:57:08,987 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 states have internal predecessors, (26), 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) [2021-12-15 13:57:09,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:09,141 INFO L93 Difference]: Finished difference Result 76 states and 83 transitions. [2021-12-15 13:57:09,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-15 13:57:09,142 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-15 13:57:09,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:09,142 INFO L225 Difference]: With dead ends: 76 [2021-12-15 13:57:09,142 INFO L226 Difference]: Without dead ends: 76 [2021-12-15 13:57:09,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-12-15 13:57:09,143 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 164 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:09,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 106 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:57:09,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-15 13:57:09,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 35. [2021-12-15 13:57:09,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 34 states have internal predecessors, (40), 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) [2021-12-15 13:57:09,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2021-12-15 13:57:09,146 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 11 [2021-12-15 13:57:09,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:09,147 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2021-12-15 13:57:09,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 states have internal predecessors, (26), 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) [2021-12-15 13:57:09,147 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2021-12-15 13:57:09,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-15 13:57:09,147 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:09,147 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:09,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 13:57:09,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-15 13:57:09,362 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 13:57:09,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:09,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1632976699, now seen corresponding path program 1 times [2021-12-15 13:57:09,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:09,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236999845] [2021-12-15 13:57:09,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:09,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:09,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:09,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:09,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:09,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236999845] [2021-12-15 13:57:09,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236999845] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:57:09,421 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:57:09,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 13:57:09,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979603804] [2021-12-15 13:57:09,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:57:09,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 13:57:09,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:09,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 13:57:09,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-12-15 13:57:09,422 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 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) [2021-12-15 13:57:09,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:09,465 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2021-12-15 13:57:09,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 13:57:09,465 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-15 13:57:09,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:09,466 INFO L225 Difference]: With dead ends: 34 [2021-12-15 13:57:09,466 INFO L226 Difference]: Without dead ends: 34 [2021-12-15 13:57:09,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2021-12-15 13:57:09,467 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 59 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:09,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 29 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:57:09,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-15 13:57:09,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-12-15 13:57:09,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 32 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) [2021-12-15 13:57:09,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2021-12-15 13:57:09,469 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 11 [2021-12-15 13:57:09,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:09,469 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2021-12-15 13:57:09,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 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) [2021-12-15 13:57:09,470 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2021-12-15 13:57:09,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-15 13:57:09,470 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:09,470 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:09,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 13:57:09,471 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 13:57:09,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:09,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1632976752, now seen corresponding path program 1 times [2021-12-15 13:57:09,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:09,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204720235] [2021-12-15 13:57:09,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:09,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:09,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:09,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:09,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:09,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204720235] [2021-12-15 13:57:09,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204720235] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:09,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926163598] [2021-12-15 13:57:09,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:09,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:09,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:09,516 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) [2021-12-15 13:57:09,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 13:57:09,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:09,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-15 13:57:09,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:09,580 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-15 13:57:09,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-15 13:57:09,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:09,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:09,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:09,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926163598] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:09,720 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:09,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2021-12-15 13:57:09,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96859503] [2021-12-15 13:57:09,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:09,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-15 13:57:09,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:09,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-15 13:57:09,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-12-15 13:57:09,722 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 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) [2021-12-15 13:57:09,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:09,762 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2021-12-15 13:57:09,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 13:57:09,763 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-15 13:57:09,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:09,763 INFO L225 Difference]: With dead ends: 37 [2021-12-15 13:57:09,763 INFO L226 Difference]: Without dead ends: 37 [2021-12-15 13:57:09,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-12-15 13:57:09,764 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 43 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:09,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 53 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:57:09,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-15 13:57:09,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2021-12-15 13:57:09,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 23 states have internal predecessors, (27), 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) [2021-12-15 13:57:09,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-12-15 13:57:09,766 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 11 [2021-12-15 13:57:09,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:09,767 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-12-15 13:57:09,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 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) [2021-12-15 13:57:09,767 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-12-15 13:57:09,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-15 13:57:09,767 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:09,767 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:09,785 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-15 13:57:09,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:09,983 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 13:57:09,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:09,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1319506494, now seen corresponding path program 1 times [2021-12-15 13:57:09,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:09,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885354361] [2021-12-15 13:57:09,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:09,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:09,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:10,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:10,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:10,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885354361] [2021-12-15 13:57:10,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885354361] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:57:10,029 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:57:10,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 13:57:10,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077700975] [2021-12-15 13:57:10,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:57:10,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 13:57:10,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:10,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 13:57:10,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 13:57:10,030 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:10,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:10,047 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2021-12-15 13:57:10,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 13:57:10,047 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-15 13:57:10,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:10,048 INFO L225 Difference]: With dead ends: 23 [2021-12-15 13:57:10,048 INFO L226 Difference]: Without dead ends: 23 [2021-12-15 13:57:10,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 13:57:10,048 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 18 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:10,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 28 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:57:10,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-15 13:57:10,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-12-15 13:57:10,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.368421052631579) internal successors, (26), 22 states have internal predecessors, (26), 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) [2021-12-15 13:57:10,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-12-15 13:57:10,050 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 13 [2021-12-15 13:57:10,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:10,051 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-12-15 13:57:10,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:10,051 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-12-15 13:57:10,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-15 13:57:10,051 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:10,051 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:10,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 13:57:10,052 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 13:57:10,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:10,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1319506495, now seen corresponding path program 1 times [2021-12-15 13:57:10,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:10,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982127652] [2021-12-15 13:57:10,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:10,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:10,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:10,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:10,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:10,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982127652] [2021-12-15 13:57:10,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982127652] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:10,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557240855] [2021-12-15 13:57:10,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:10,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:10,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:10,096 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) [2021-12-15 13:57:10,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 13:57:10,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:10,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-15 13:57:10,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:10,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:10,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:10,222 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 20 treesize of output 16 [2021-12-15 13:57:10,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:10,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557240855] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:10,240 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:10,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2021-12-15 13:57:10,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243908598] [2021-12-15 13:57:10,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:10,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-15 13:57:10,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:10,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-15 13:57:10,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-15 13:57:10,242 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 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) [2021-12-15 13:57:10,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:10,307 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-12-15 13:57:10,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 13:57:10,308 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 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 13 [2021-12-15 13:57:10,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:10,309 INFO L225 Difference]: With dead ends: 36 [2021-12-15 13:57:10,309 INFO L226 Difference]: Without dead ends: 36 [2021-12-15 13:57:10,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-12-15 13:57:10,310 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 88 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:10,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 56 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:57:10,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-15 13:57:10,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 24. [2021-12-15 13:57:10,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.35) internal successors, (27), 23 states have internal predecessors, (27), 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) [2021-12-15 13:57:10,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-12-15 13:57:10,313 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 13 [2021-12-15 13:57:10,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:10,313 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-12-15 13:57:10,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 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) [2021-12-15 13:57:10,313 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-12-15 13:57:10,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-15 13:57:10,314 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:10,314 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:10,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-15 13:57:10,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:10,515 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 13:57:10,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:10,516 INFO L85 PathProgramCache]: Analyzing trace with hash -2044971629, now seen corresponding path program 1 times [2021-12-15 13:57:10,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:10,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782705817] [2021-12-15 13:57:10,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:10,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:10,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:10,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 13:57:10,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:10,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782705817] [2021-12-15 13:57:10,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782705817] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:57:10,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:57:10,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 13:57:10,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643250182] [2021-12-15 13:57:10,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:57:10,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 13:57:10,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:10,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 13:57:10,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-15 13:57:10,582 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:10,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:10,685 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2021-12-15 13:57:10,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-15 13:57:10,686 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-15 13:57:10,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:10,686 INFO L225 Difference]: With dead ends: 42 [2021-12-15 13:57:10,686 INFO L226 Difference]: Without dead ends: 42 [2021-12-15 13:57:10,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-12-15 13:57:10,687 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 58 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:10,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 44 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:57:10,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-15 13:57:10,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 23. [2021-12-15 13:57:10,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 20 states have (on average 1.3) internal successors, (26), 22 states have internal predecessors, (26), 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) [2021-12-15 13:57:10,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-12-15 13:57:10,689 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2021-12-15 13:57:10,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:10,689 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-12-15 13:57:10,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:10,690 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-12-15 13:57:10,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-15 13:57:10,690 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:10,690 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:10,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 13:57:10,690 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 13:57:10,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:10,691 INFO L85 PathProgramCache]: Analyzing trace with hash -2044971628, now seen corresponding path program 1 times [2021-12-15 13:57:10,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:10,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028209687] [2021-12-15 13:57:10,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:10,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:10,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:10,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 13:57:10,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:10,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028209687] [2021-12-15 13:57:10,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028209687] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:57:10,727 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:57:10,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 13:57:10,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732220144] [2021-12-15 13:57:10,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:57:10,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 13:57:10,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:10,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 13:57:10,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 13:57:10,728 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:10,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:10,753 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-12-15 13:57:10,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 13:57:10,753 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-15 13:57:10,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:10,753 INFO L225 Difference]: With dead ends: 30 [2021-12-15 13:57:10,753 INFO L226 Difference]: Without dead ends: 30 [2021-12-15 13:57:10,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 13:57:10,754 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 50 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:10,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 34 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:57:10,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-15 13:57:10,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2021-12-15 13:57:10,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 23 states have internal predecessors, (27), 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) [2021-12-15 13:57:10,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-12-15 13:57:10,755 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 14 [2021-12-15 13:57:10,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:10,756 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-12-15 13:57:10,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:10,756 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-12-15 13:57:10,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-15 13:57:10,756 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:10,756 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:10,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 13:57:10,756 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 13:57:10,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:10,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1933649190, now seen corresponding path program 1 times [2021-12-15 13:57:10,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:10,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363454580] [2021-12-15 13:57:10,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:10,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:10,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:10,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:10,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:10,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363454580] [2021-12-15 13:57:10,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363454580] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:10,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237164665] [2021-12-15 13:57:10,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:10,846 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:10,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:10,864 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) [2021-12-15 13:57:10,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 13:57:10,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:10,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-15 13:57:10,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:10,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-15 13:57:11,069 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:57:11,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-12-15 13:57:11,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:11,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:11,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 11 [2021-12-15 13:57:11,283 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 20 treesize of output 18 [2021-12-15 13:57:11,378 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 47 treesize of output 39 [2021-12-15 13:57:11,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:11,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237164665] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:11,431 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:11,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 22 [2021-12-15 13:57:11,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941243181] [2021-12-15 13:57:11,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:11,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-15 13:57:11,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:11,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-15 13:57:11,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-12-15 13:57:11,432 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 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) [2021-12-15 13:57:11,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:11,693 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2021-12-15 13:57:11,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-15 13:57:11,694 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 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 17 [2021-12-15 13:57:11,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:11,694 INFO L225 Difference]: With dead ends: 39 [2021-12-15 13:57:11,694 INFO L226 Difference]: Without dead ends: 39 [2021-12-15 13:57:11,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2021-12-15 13:57:11,695 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 52 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:11,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 171 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 157 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2021-12-15 13:57:11,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-15 13:57:11,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2021-12-15 13:57:11,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 32 states have (on average 1.21875) internal successors, (39), 34 states have internal predecessors, (39), 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) [2021-12-15 13:57:11,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-12-15 13:57:11,697 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 17 [2021-12-15 13:57:11,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:11,697 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-12-15 13:57:11,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 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) [2021-12-15 13:57:11,697 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-12-15 13:57:11,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-15 13:57:11,697 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:11,697 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:11,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 13:57:11,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-15 13:57:11,904 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 13:57:11,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:11,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1350200856, now seen corresponding path program 1 times [2021-12-15 13:57:11,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:11,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709054583] [2021-12-15 13:57:11,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:11,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:11,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:12,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:12,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:12,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709054583] [2021-12-15 13:57:12,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709054583] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:12,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052992146] [2021-12-15 13:57:12,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:12,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:12,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:12,019 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) [2021-12-15 13:57:12,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 13:57:12,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:12,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-15 13:57:12,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:12,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-15 13:57:12,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2021-12-15 13:57:12,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 13:57:12,134 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 13:57:12,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052992146] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:57:12,134 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 13:57:12,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 11 [2021-12-15 13:57:12,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293762770] [2021-12-15 13:57:12,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:57:12,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 13:57:12,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:12,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 13:57:12,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-12-15 13:57:12,135 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 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) [2021-12-15 13:57:12,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:12,191 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2021-12-15 13:57:12,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-15 13:57:12,191 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 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 17 [2021-12-15 13:57:12,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:12,192 INFO L225 Difference]: With dead ends: 59 [2021-12-15 13:57:12,192 INFO L226 Difference]: Without dead ends: 59 [2021-12-15 13:57:12,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-12-15 13:57:12,192 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 25 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:12,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 86 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 43 Invalid, 0 Unknown, 12 Unchecked, 0.0s Time] [2021-12-15 13:57:12,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-15 13:57:12,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 36. [2021-12-15 13:57:12,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 35 states have internal predecessors, (41), 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) [2021-12-15 13:57:12,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2021-12-15 13:57:12,194 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 17 [2021-12-15 13:57:12,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:12,194 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2021-12-15 13:57:12,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 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) [2021-12-15 13:57:12,195 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2021-12-15 13:57:12,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-15 13:57:12,195 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:12,195 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:12,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-15 13:57:12,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-15 13:57:12,413 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 13:57:12,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:12,414 INFO L85 PathProgramCache]: Analyzing trace with hash 70337178, now seen corresponding path program 1 times [2021-12-15 13:57:12,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:12,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264484640] [2021-12-15 13:57:12,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:12,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:12,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:12,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:12,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:12,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264484640] [2021-12-15 13:57:12,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264484640] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:12,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627069946] [2021-12-15 13:57:12,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:12,514 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:12,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:12,515 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) [2021-12-15 13:57:12,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-15 13:57:12,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:12,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-15 13:57:12,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:12,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-15 13:57:12,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2021-12-15 13:57:12,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:12,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:12,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 11 [2021-12-15 13:57:12,693 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 20 treesize of output 18 [2021-12-15 13:57:12,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:12,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627069946] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:12,751 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:12,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2021-12-15 13:57:12,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340995016] [2021-12-15 13:57:12,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:12,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-15 13:57:12,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:12,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-15 13:57:12,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-12-15 13:57:12,752 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 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) [2021-12-15 13:57:12,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:12,914 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2021-12-15 13:57:12,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-15 13:57:12,915 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 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 17 [2021-12-15 13:57:12,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:12,915 INFO L225 Difference]: With dead ends: 70 [2021-12-15 13:57:12,915 INFO L226 Difference]: Without dead ends: 70 [2021-12-15 13:57:12,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=197, Invalid=453, Unknown=0, NotChecked=0, Total=650 [2021-12-15 13:57:12,916 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 73 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:12,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 139 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 91 Invalid, 0 Unknown, 19 Unchecked, 0.1s Time] [2021-12-15 13:57:12,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-15 13:57:12,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 40. [2021-12-15 13:57:12,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 39 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:12,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2021-12-15 13:57:12,918 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 17 [2021-12-15 13:57:12,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:12,918 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2021-12-15 13:57:12,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 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) [2021-12-15 13:57:12,918 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2021-12-15 13:57:12,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-15 13:57:12,919 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:12,919 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:12,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-15 13:57:13,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:13,129 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 13:57:13,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:13,129 INFO L85 PathProgramCache]: Analyzing trace with hash 186362076, now seen corresponding path program 1 times [2021-12-15 13:57:13,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:13,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913950646] [2021-12-15 13:57:13,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:13,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:13,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:13,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 13:57:13,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:13,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913950646] [2021-12-15 13:57:13,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913950646] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:57:13,188 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:57:13,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 13:57:13,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596880696] [2021-12-15 13:57:13,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:57:13,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 13:57:13,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:13,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 13:57:13,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 13:57:13,189 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:13,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:13,198 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2021-12-15 13:57:13,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 13:57:13,198 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-15 13:57:13,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:13,199 INFO L225 Difference]: With dead ends: 39 [2021-12-15 13:57:13,199 INFO L226 Difference]: Without dead ends: 24 [2021-12-15 13:57:13,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 13:57:13,199 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:13,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 32 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:57:13,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-15 13:57:13,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-12-15 13:57:13,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 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) [2021-12-15 13:57:13,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-12-15 13:57:13,202 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 18 [2021-12-15 13:57:13,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:13,202 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-12-15 13:57:13,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:13,202 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-12-15 13:57:13,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-15 13:57:13,202 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:13,202 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:13,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-15 13:57:13,203 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 13:57:13,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:13,203 INFO L85 PathProgramCache]: Analyzing trace with hash -2146020323, now seen corresponding path program 2 times [2021-12-15 13:57:13,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:13,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916451567] [2021-12-15 13:57:13,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:13,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:13,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:13,263 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:13,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:13,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916451567] [2021-12-15 13:57:13,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916451567] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:13,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390376685] [2021-12-15 13:57:13,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 13:57:13,264 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:13,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:13,265 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) [2021-12-15 13:57:13,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-15 13:57:13,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 13:57:13,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:57:13,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-15 13:57:13,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:13,328 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-15 13:57:13,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-15 13:57:13,432 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:13,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:13,587 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:13,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390376685] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:13,587 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:13,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2021-12-15 13:57:13,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275090344] [2021-12-15 13:57:13,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:13,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-15 13:57:13,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:13,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-15 13:57:13,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-12-15 13:57:13,588 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 19 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:13,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:13,689 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2021-12-15 13:57:13,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-15 13:57:13,690 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-15 13:57:13,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:13,690 INFO L225 Difference]: With dead ends: 31 [2021-12-15 13:57:13,690 INFO L226 Difference]: Without dead ends: 31 [2021-12-15 13:57:13,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2021-12-15 13:57:13,691 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 97 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:13,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 60 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:57:13,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-15 13:57:13,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2021-12-15 13:57:13,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 25 states have (on average 1.12) internal successors, (28), 26 states have internal predecessors, (28), 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) [2021-12-15 13:57:13,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-12-15 13:57:13,692 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 21 [2021-12-15 13:57:13,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:13,693 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-12-15 13:57:13,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:13,693 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-12-15 13:57:13,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-15 13:57:13,693 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:13,693 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:13,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-15 13:57:13,907 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,SelfDestructingSolverStorable17 [2021-12-15 13:57:13,907 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 13:57:13,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:13,908 INFO L85 PathProgramCache]: Analyzing trace with hash -2102120586, now seen corresponding path program 1 times [2021-12-15 13:57:13,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:13,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64283712] [2021-12-15 13:57:13,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:13,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:13,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:13,960 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:13,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:13,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64283712] [2021-12-15 13:57:13,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64283712] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:13,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357844583] [2021-12-15 13:57:13,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:13,961 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:13,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:13,976 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) [2021-12-15 13:57:13,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-15 13:57:14,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:14,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-15 13:57:14,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:14,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 13:57:14,044 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 [2021-12-15 13:57:14,047 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 [2021-12-15 13:57:14,148 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:14,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:14,308 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:14,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357844583] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:14,309 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:14,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 17 [2021-12-15 13:57:14,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593774944] [2021-12-15 13:57:14,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:14,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-15 13:57:14,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:14,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-15 13:57:14,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-12-15 13:57:14,310 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 18 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:14,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:14,441 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2021-12-15 13:57:14,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-15 13:57:14,441 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-15 13:57:14,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:14,442 INFO L225 Difference]: With dead ends: 30 [2021-12-15 13:57:14,442 INFO L226 Difference]: Without dead ends: 30 [2021-12-15 13:57:14,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-12-15 13:57:14,442 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 82 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:14,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 43 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:57:14,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-15 13:57:14,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2021-12-15 13:57:14,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 27 states have internal predecessors, (29), 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) [2021-12-15 13:57:14,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-12-15 13:57:14,444 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 22 [2021-12-15 13:57:14,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:14,444 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-12-15 13:57:14,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:14,445 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-12-15 13:57:14,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-15 13:57:14,445 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:14,445 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:14,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-15 13:57:14,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:14,655 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 13:57:14,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:14,656 INFO L85 PathProgramCache]: Analyzing trace with hash 643759544, now seen corresponding path program 3 times [2021-12-15 13:57:14,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:14,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219194793] [2021-12-15 13:57:14,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:14,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:14,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:14,823 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:14,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:14,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219194793] [2021-12-15 13:57:14,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219194793] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:14,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585772517] [2021-12-15 13:57:14,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 13:57:14,824 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:14,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:14,825 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) [2021-12-15 13:57:14,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-15 13:57:14,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-15 13:57:14,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:57:14,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-15 13:57:14,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:14,916 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 [2021-12-15 13:57:15,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2021-12-15 13:57:15,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-12-15 13:57:15,178 INFO L354 Elim1Store]: treesize reduction 27, result has 22.9 percent of original size [2021-12-15 13:57:15,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 18 [2021-12-15 13:57:15,186 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:15,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:15,230 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_287 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_287) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 1)) 0)) (= 0 |c_ULTIMATE.start_cstpcpy_#t~mem4#1|)) is different from false [2021-12-15 13:57:15,256 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_287 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_287) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 1)) 0)) (= 0 (select (select |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~from#1.base|) |c_ULTIMATE.start_cstpcpy_~from#1.offset|))) is different from false [2021-12-15 13:57:15,262 WARN L838 $PredicateComparison]: unable to prove that (or (= 0 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString~0#1.base|) |c_ULTIMATE.start_main_~nondetString~0#1.offset|)) (forall ((v_ArrVal_287 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_287) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString~0#1.offset| 1)) 0))) is different from false [2021-12-15 13:57:15,269 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:57:15,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 36 [2021-12-15 13:57:15,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 38 treesize of output 34 [2021-12-15 13:57:15,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 13:57:15,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 45 [2021-12-15 13:57:15,277 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 11 treesize of output 7 [2021-12-15 13:57:15,456 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 [2021-12-15 13:57:15,477 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-12-15 13:57:15,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585772517] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:15,477 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:15,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 14] total 31 [2021-12-15 13:57:15,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814407309] [2021-12-15 13:57:15,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:15,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-15 13:57:15,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:15,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-15 13:57:15,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=655, Unknown=3, NotChecked=162, Total=930 [2021-12-15 13:57:15,478 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:15,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:15,821 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2021-12-15 13:57:15,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-15 13:57:15,822 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-15 13:57:15,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:15,822 INFO L225 Difference]: With dead ends: 44 [2021-12-15 13:57:15,822 INFO L226 Difference]: Without dead ends: 35 [2021-12-15 13:57:15,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=292, Invalid=1277, Unknown=3, NotChecked=234, Total=1806 [2021-12-15 13:57:15,823 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 57 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 149 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:15,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 116 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 143 Invalid, 0 Unknown, 149 Unchecked, 0.1s Time] [2021-12-15 13:57:15,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-15 13:57:15,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2021-12-15 13:57:15,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 30 states have (on average 1.1) internal successors, (33), 31 states have internal predecessors, (33), 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) [2021-12-15 13:57:15,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-12-15 13:57:15,824 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 25 [2021-12-15 13:57:15,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:15,824 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-12-15 13:57:15,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:15,825 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-12-15 13:57:15,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-15 13:57:15,825 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:15,825 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:15,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-15 13:57:16,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:16,035 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 13:57:16,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:16,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1470618683, now seen corresponding path program 4 times [2021-12-15 13:57:16,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:16,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720827887] [2021-12-15 13:57:16,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:16,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:16,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:16,119 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:16,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:16,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720827887] [2021-12-15 13:57:16,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720827887] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:16,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566236195] [2021-12-15 13:57:16,119 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 13:57:16,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:16,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:16,121 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) [2021-12-15 13:57:16,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-15 13:57:16,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 13:57:16,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:57:16,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-15 13:57:16,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:16,272 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:16,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:16,378 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 7 treesize of output 5 [2021-12-15 13:57:16,398 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:16,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566236195] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:16,398 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:16,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2021-12-15 13:57:16,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867018955] [2021-12-15 13:57:16,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:16,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-15 13:57:16,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:16,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-15 13:57:16,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-12-15 13:57:16,399 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 21 states, 20 states have (on average 3.2) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:16,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:16,532 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2021-12-15 13:57:16,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-15 13:57:16,533 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.2) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-15 13:57:16,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:16,533 INFO L225 Difference]: With dead ends: 39 [2021-12-15 13:57:16,533 INFO L226 Difference]: Without dead ends: 39 [2021-12-15 13:57:16,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2021-12-15 13:57:16,534 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 57 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:16,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 94 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:57:16,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-15 13:57:16,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2021-12-15 13:57:16,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 34 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:16,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2021-12-15 13:57:16,536 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 29 [2021-12-15 13:57:16,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:16,536 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2021-12-15 13:57:16,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.2) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:16,536 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2021-12-15 13:57:16,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-15 13:57:16,537 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:16,537 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:16,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-15 13:57:16,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-15 13:57:16,754 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 13:57:16,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:16,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1655461096, now seen corresponding path program 2 times [2021-12-15 13:57:16,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:16,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295966977] [2021-12-15 13:57:16,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:16,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:16,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:16,836 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:16,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:16,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295966977] [2021-12-15 13:57:16,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295966977] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:16,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840990402] [2021-12-15 13:57:16,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 13:57:16,837 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:16,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:16,838 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:57:16,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-15 13:57:16,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 13:57:16,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:57:16,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-15 13:57:16,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:16,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 13:57:16,925 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 [2021-12-15 13:57:16,928 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 [2021-12-15 13:57:17,118 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:17,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:17,342 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:17,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840990402] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:17,343 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:17,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 23 [2021-12-15 13:57:17,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690863759] [2021-12-15 13:57:17,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:17,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-15 13:57:17,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:17,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-15 13:57:17,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-12-15 13:57:17,344 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 24 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 24 states have internal predecessors, (81), 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) [2021-12-15 13:57:17,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:17,546 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2021-12-15 13:57:17,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-15 13:57:17,548 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 24 states have internal predecessors, (81), 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 30 [2021-12-15 13:57:17,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:17,549 INFO L225 Difference]: With dead ends: 38 [2021-12-15 13:57:17,549 INFO L226 Difference]: Without dead ends: 38 [2021-12-15 13:57:17,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=206, Invalid=724, Unknown=0, NotChecked=0, Total=930 [2021-12-15 13:57:17,549 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:17,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 80 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:57:17,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-15 13:57:17,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2021-12-15 13:57:17,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 34 states have (on average 1.088235294117647) internal successors, (37), 35 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:17,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-12-15 13:57:17,551 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 30 [2021-12-15 13:57:17,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:17,551 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-12-15 13:57:17,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 24 states have internal predecessors, (81), 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) [2021-12-15 13:57:17,551 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-12-15 13:57:17,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-15 13:57:17,551 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:17,551 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:17,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-15 13:57:17,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-15 13:57:17,752 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 13:57:17,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:17,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1267943126, now seen corresponding path program 5 times [2021-12-15 13:57:17,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:17,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965686027] [2021-12-15 13:57:17,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:17,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:17,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:17,935 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:17,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:17,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965686027] [2021-12-15 13:57:17,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965686027] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:17,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571179296] [2021-12-15 13:57:17,936 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 13:57:17,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:17,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:17,937 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:57:17,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-15 13:57:18,006 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-15 13:57:18,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:57:18,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-15 13:57:18,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:18,046 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-15 13:57:18,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-15 13:57:18,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-15 13:57:18,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 13:57:18,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-15 13:57:18,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 13:57:18,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-15 13:57:18,371 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:57:18,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-12-15 13:57:18,456 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:18,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:23,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 378 treesize of output 366 [2021-12-15 13:57:24,201 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:24,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571179296] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:24,201 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:24,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 14] total 38 [2021-12-15 13:57:24,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056227084] [2021-12-15 13:57:24,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:24,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-15 13:57:24,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:24,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-15 13:57:24,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1270, Unknown=1, NotChecked=0, Total=1406 [2021-12-15 13:57:24,203 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 38 states, 38 states have (on average 2.3947368421052633) internal successors, (91), 38 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:25,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:25,479 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2021-12-15 13:57:25,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-15 13:57:25,479 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.3947368421052633) internal successors, (91), 38 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-12-15 13:57:25,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:25,480 INFO L225 Difference]: With dead ends: 60 [2021-12-15 13:57:25,480 INFO L226 Difference]: Without dead ends: 47 [2021-12-15 13:57:25,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=584, Invalid=3197, Unknown=1, NotChecked=0, Total=3782 [2021-12-15 13:57:25,481 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 220 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:25,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 155 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 412 Invalid, 0 Unknown, 91 Unchecked, 0.3s Time] [2021-12-15 13:57:25,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-15 13:57:25,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2021-12-15 13:57:25,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 42 states have internal predecessors, (44), 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) [2021-12-15 13:57:25,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2021-12-15 13:57:25,482 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 33 [2021-12-15 13:57:25,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:25,483 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2021-12-15 13:57:25,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.3947368421052633) internal successors, (91), 38 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:25,483 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2021-12-15 13:57:25,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-15 13:57:25,483 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:25,484 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:25,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-15 13:57:25,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-15 13:57:25,700 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 13:57:25,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:25,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1740941126, now seen corresponding path program 3 times [2021-12-15 13:57:25,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:25,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704863237] [2021-12-15 13:57:25,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:25,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:25,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:25,827 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:25,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:25,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704863237] [2021-12-15 13:57:25,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704863237] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:25,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119662016] [2021-12-15 13:57:25,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 13:57:25,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:25,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:25,838 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:57:25,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-15 13:57:25,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-15 13:57:25,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:57:25,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-15 13:57:25,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:25,931 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-15 13:57:25,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-15 13:57:25,946 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 [2021-12-15 13:57:26,318 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-15 13:57:26,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:26,696 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-15 13:57:26,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119662016] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:26,697 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:26,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 24 [2021-12-15 13:57:26,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759518556] [2021-12-15 13:57:26,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:26,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-15 13:57:26,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:26,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-15 13:57:26,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-12-15 13:57:26,698 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 25 states, 24 states have (on average 3.4166666666666665) internal successors, (82), 25 states have internal predecessors, (82), 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) [2021-12-15 13:57:27,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:27,307 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2021-12-15 13:57:27,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-15 13:57:27,307 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 3.4166666666666665) internal successors, (82), 25 states have internal predecessors, (82), 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 38 [2021-12-15 13:57:27,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:27,308 INFO L225 Difference]: With dead ends: 59 [2021-12-15 13:57:27,308 INFO L226 Difference]: Without dead ends: 59 [2021-12-15 13:57:27,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=310, Invalid=1250, Unknown=0, NotChecked=0, Total=1560 [2021-12-15 13:57:27,309 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 95 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:27,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 147 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 339 Invalid, 0 Unknown, 31 Unchecked, 0.2s Time] [2021-12-15 13:57:27,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-15 13:57:27,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2021-12-15 13:57:27,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 54 states have (on average 1.1111111111111112) internal successors, (60), 55 states have internal predecessors, (60), 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) [2021-12-15 13:57:27,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2021-12-15 13:57:27,311 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 38 [2021-12-15 13:57:27,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:27,311 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2021-12-15 13:57:27,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 3.4166666666666665) internal successors, (82), 25 states have internal predecessors, (82), 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) [2021-12-15 13:57:27,311 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2021-12-15 13:57:27,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-15 13:57:27,312 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:27,312 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:27,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-15 13:57:27,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:27,529 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 13:57:27,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:27,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1647975924, now seen corresponding path program 6 times [2021-12-15 13:57:27,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:27,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105488377] [2021-12-15 13:57:27,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:27,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:27,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:27,768 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:27,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:27,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105488377] [2021-12-15 13:57:27,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105488377] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:27,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31395620] [2021-12-15 13:57:27,768 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 13:57:27,769 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:27,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:27,769 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:57:27,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-15 13:57:27,850 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-15 13:57:27,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:57:27,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-15 13:57:27,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:27,862 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 [2021-12-15 13:57:28,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2021-12-15 13:57:28,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-15 13:57:28,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-15 13:57:28,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-15 13:57:28,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2021-12-15 13:57:28,218 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:28,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:28,240 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_503 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_503) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 1)) 0)) is different from false [2021-12-15 13:57:28,245 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_503 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_503) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 2)) 0)) is different from false [2021-12-15 13:57:28,256 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_503 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_503) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 3)) 0)) is different from false [2021-12-15 13:57:28,277 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_503 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_503) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString~0#1.offset| 3)) 0)) is different from false [2021-12-15 13:57:28,282 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:57:28,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-15 13:57:28,287 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:57:28,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-15 13:57:28,293 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 11 treesize of output 7 [2021-12-15 13:57:28,446 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 7 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 20 not checked. [2021-12-15 13:57:28,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31395620] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:28,447 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:28,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 31 [2021-12-15 13:57:28,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867391025] [2021-12-15 13:57:28,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:28,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-15 13:57:28,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:28,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-15 13:57:28,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=631, Unknown=4, NotChecked=212, Total=930 [2021-12-15 13:57:28,448 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 31 states have internal predecessors, (85), 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) [2021-12-15 13:57:28,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:28,875 INFO L93 Difference]: Finished difference Result 80 states and 84 transitions. [2021-12-15 13:57:28,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-15 13:57:28,876 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 31 states have internal predecessors, (85), 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 41 [2021-12-15 13:57:28,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:28,877 INFO L225 Difference]: With dead ends: 80 [2021-12-15 13:57:28,877 INFO L226 Difference]: Without dead ends: 63 [2021-12-15 13:57:28,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 64 SyntacticMatches, 8 SemanticMatches, 38 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=149, Invalid=1123, Unknown=4, NotChecked=284, Total=1560 [2021-12-15 13:57:28,881 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 33 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 193 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:28,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 236 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 446 Invalid, 0 Unknown, 193 Unchecked, 0.2s Time] [2021-12-15 13:57:28,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-15 13:57:28,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 60. [2021-12-15 13:57:28,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 58 states have (on average 1.103448275862069) internal successors, (64), 59 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:28,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2021-12-15 13:57:28,890 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 41 [2021-12-15 13:57:28,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:28,891 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2021-12-15 13:57:28,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 31 states have internal predecessors, (85), 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) [2021-12-15 13:57:28,891 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2021-12-15 13:57:28,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-15 13:57:28,893 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:28,893 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:28,911 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-15 13:57:29,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:29,107 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 13:57:29,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:29,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1728866697, now seen corresponding path program 7 times [2021-12-15 13:57:29,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:29,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467846702] [2021-12-15 13:57:29,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:29,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:29,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:29,248 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 15 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:29,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:29,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467846702] [2021-12-15 13:57:29,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467846702] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:29,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388456166] [2021-12-15 13:57:29,249 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-15 13:57:29,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:29,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:29,250 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:57:29,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-15 13:57:29,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:29,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-15 13:57:29,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:29,496 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 32 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:29,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:29,670 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 7 treesize of output 5 [2021-12-15 13:57:29,700 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 32 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:29,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388456166] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:29,700 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:29,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 28 [2021-12-15 13:57:29,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130813413] [2021-12-15 13:57:29,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:29,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-15 13:57:29,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:29,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-15 13:57:29,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2021-12-15 13:57:29,701 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 29 states, 28 states have (on average 3.4285714285714284) internal successors, (96), 29 states have internal predecessors, (96), 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) [2021-12-15 13:57:29,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:29,938 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2021-12-15 13:57:29,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-15 13:57:29,938 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 3.4285714285714284) internal successors, (96), 29 states have internal predecessors, (96), 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 45 [2021-12-15 13:57:29,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:29,939 INFO L225 Difference]: With dead ends: 60 [2021-12-15 13:57:29,939 INFO L226 Difference]: Without dead ends: 60 [2021-12-15 13:57:29,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=260, Invalid=1000, Unknown=0, NotChecked=0, Total=1260 [2021-12-15 13:57:29,939 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 167 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:29,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 161 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 13:57:29,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-15 13:57:29,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-12-15 13:57:29,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 58 states have (on average 1.0862068965517242) internal successors, (63), 59 states have internal predecessors, (63), 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) [2021-12-15 13:57:29,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2021-12-15 13:57:29,941 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 45 [2021-12-15 13:57:29,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:29,941 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2021-12-15 13:57:29,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 3.4285714285714284) internal successors, (96), 29 states have internal predecessors, (96), 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) [2021-12-15 13:57:29,942 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2021-12-15 13:57:29,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-15 13:57:29,942 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:29,942 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:29,959 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-15 13:57:30,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-15 13:57:30,159 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 13:57:30,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:30,159 INFO L85 PathProgramCache]: Analyzing trace with hash 801080082, now seen corresponding path program 8 times [2021-12-15 13:57:30,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:30,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326415370] [2021-12-15 13:57:30,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:30,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:30,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:30,405 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 9 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:30,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:30,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326415370] [2021-12-15 13:57:30,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326415370] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:30,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717493505] [2021-12-15 13:57:30,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 13:57:30,406 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:30,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:30,406 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:57:30,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-15 13:57:30,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 13:57:30,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:57:30,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-15 13:57:30,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:30,537 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 [2021-12-15 13:57:30,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2021-12-15 13:57:30,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-15 13:57:30,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-15 13:57:30,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-15 13:57:30,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-15 13:57:30,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2021-12-15 13:57:30,936 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 9 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:30,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:30,969 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_614 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_614) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 1)) 0)) is different from false [2021-12-15 13:57:30,975 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_614 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_614) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 2)) 0)) is different from false [2021-12-15 13:57:30,986 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_614 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_614) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 3)) 0)) is different from false [2021-12-15 13:57:30,997 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_614 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_614) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 4)) 0)) is different from false [2021-12-15 13:57:31,008 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_614 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_614) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString~0#1.offset| 4)) 0)) is different from false [2021-12-15 13:57:31,013 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:57:31,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-15 13:57:31,018 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:57:31,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-15 13:57:31,021 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 11 treesize of output 7 [2021-12-15 13:57:31,209 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 35 not checked. [2021-12-15 13:57:31,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717493505] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:31,210 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:31,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 35 [2021-12-15 13:57:31,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571552089] [2021-12-15 13:57:31,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:31,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-15 13:57:31,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:31,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-15 13:57:31,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=793, Unknown=5, NotChecked=300, Total=1190 [2021-12-15 13:57:31,212 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand has 35 states, 35 states have (on average 2.8857142857142857) internal successors, (101), 35 states have internal predecessors, (101), 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) [2021-12-15 13:57:31,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:31,803 INFO L93 Difference]: Finished difference Result 88 states and 91 transitions. [2021-12-15 13:57:31,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-15 13:57:31,803 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.8857142857142857) internal successors, (101), 35 states have internal predecessors, (101), 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 49 [2021-12-15 13:57:31,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:31,804 INFO L225 Difference]: With dead ends: 88 [2021-12-15 13:57:31,804 INFO L226 Difference]: Without dead ends: 67 [2021-12-15 13:57:31,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 78 SyntacticMatches, 9 SemanticMatches, 46 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=206, Invalid=1615, Unknown=5, NotChecked=430, Total=2256 [2021-12-15 13:57:31,805 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 44 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 284 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:31,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 336 Invalid, 987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 686 Invalid, 0 Unknown, 284 Unchecked, 0.2s Time] [2021-12-15 13:57:31,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-15 13:57:31,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2021-12-15 13:57:31,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 62 states have (on average 1.0806451612903225) internal successors, (67), 63 states have internal predecessors, (67), 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) [2021-12-15 13:57:31,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2021-12-15 13:57:31,806 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 49 [2021-12-15 13:57:31,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:31,807 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2021-12-15 13:57:31,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.8857142857142857) internal successors, (101), 35 states have internal predecessors, (101), 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) [2021-12-15 13:57:31,807 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2021-12-15 13:57:31,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-15 13:57:31,816 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:31,816 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:31,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-15 13:57:32,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-15 13:57:32,023 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 13:57:32,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:32,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1870280555, now seen corresponding path program 9 times [2021-12-15 13:57:32,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:32,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345285174] [2021-12-15 13:57:32,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:32,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:32,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:32,200 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 28 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:32,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:32,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345285174] [2021-12-15 13:57:32,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345285174] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:32,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519202819] [2021-12-15 13:57:32,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 13:57:32,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:32,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:32,202 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:57:32,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-15 13:57:32,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-15 13:57:32,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:57:32,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 86 conjunts are in the unsatisfiable core [2021-12-15 13:57:32,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:32,360 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-15 13:57:32,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-15 13:57:32,368 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 [2021-12-15 13:57:32,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 16 treesize of output 12 [2021-12-15 13:57:32,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-15 13:57:32,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-15 13:57:32,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-15 13:57:32,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-15 13:57:32,911 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:57:32,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-12-15 13:57:33,005 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 21 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-15 13:57:33,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:33,489 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:57:33,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-15 13:57:33,494 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:57:33,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-15 13:57:33,496 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 11 treesize of output 7 [2021-12-15 13:57:33,888 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-15 13:57:33,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519202819] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:33,889 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:33,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 41 [2021-12-15 13:57:33,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675331963] [2021-12-15 13:57:33,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:33,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-15 13:57:33,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:33,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-15 13:57:33,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1527, Unknown=1, NotChecked=0, Total=1722 [2021-12-15 13:57:33,891 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand has 42 states, 41 states have (on average 2.902439024390244) internal successors, (119), 42 states have internal predecessors, (119), 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) [2021-12-15 13:57:35,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:35,683 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2021-12-15 13:57:35,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-15 13:57:35,684 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.902439024390244) internal successors, (119), 42 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-12-15 13:57:35,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:35,684 INFO L225 Difference]: With dead ends: 72 [2021-12-15 13:57:35,684 INFO L226 Difference]: Without dead ends: 72 [2021-12-15 13:57:35,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1078 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=808, Invalid=4727, Unknown=15, NotChecked=0, Total=5550 [2021-12-15 13:57:35,686 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 105 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 241 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:35,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 286 Invalid, 911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 598 Invalid, 0 Unknown, 241 Unchecked, 0.3s Time] [2021-12-15 13:57:35,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-12-15 13:57:35,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2021-12-15 13:57:35,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 70 states have internal predecessors, (73), 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) [2021-12-15 13:57:35,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2021-12-15 13:57:35,687 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 53 [2021-12-15 13:57:35,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:35,687 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2021-12-15 13:57:35,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.902439024390244) internal successors, (119), 42 states have internal predecessors, (119), 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) [2021-12-15 13:57:35,688 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2021-12-15 13:57:35,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-15 13:57:35,688 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:35,688 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:35,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-15 13:57:35,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-15 13:57:35,889 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 13:57:35,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:35,889 INFO L85 PathProgramCache]: Analyzing trace with hash -572986616, now seen corresponding path program 4 times [2021-12-15 13:57:35,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:35,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444921435] [2021-12-15 13:57:35,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:35,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:35,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:36,078 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 76 proven. 87 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 13:57:36,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:36,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444921435] [2021-12-15 13:57:36,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444921435] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:36,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612041393] [2021-12-15 13:57:36,079 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 13:57:36,079 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:36,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:36,080 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:57:36,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-15 13:57:36,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 13:57:36,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:57:36,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-15 13:57:36,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:36,194 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-15 13:57:36,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-15 13:57:36,603 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 97 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 13:57:36,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:36,923 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 91 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 13:57:36,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612041393] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:36,923 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:36,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 41 [2021-12-15 13:57:36,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296695577] [2021-12-15 13:57:36,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:36,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-15 13:57:36,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:36,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-15 13:57:36,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=1340, Unknown=0, NotChecked=0, Total=1640 [2021-12-15 13:57:36,925 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand has 41 states, 41 states have (on average 3.5365853658536586) internal successors, (145), 41 states have internal predecessors, (145), 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) [2021-12-15 13:57:37,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:37,360 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2021-12-15 13:57:37,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-15 13:57:37,361 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.5365853658536586) internal successors, (145), 41 states have internal predecessors, (145), 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 62 [2021-12-15 13:57:37,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:37,361 INFO L225 Difference]: With dead ends: 105 [2021-12-15 13:57:37,361 INFO L226 Difference]: Without dead ends: 78 [2021-12-15 13:57:37,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=594, Invalid=2376, Unknown=0, NotChecked=0, Total=2970 [2021-12-15 13:57:37,362 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 92 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:37,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 134 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 13:57:37,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-15 13:57:37,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 75. [2021-12-15 13:57:37,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 73 states have (on average 1.0547945205479452) internal successors, (77), 74 states have internal predecessors, (77), 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) [2021-12-15 13:57:37,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2021-12-15 13:57:37,364 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 62 [2021-12-15 13:57:37,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:37,364 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2021-12-15 13:57:37,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.5365853658536586) internal successors, (145), 41 states have internal predecessors, (145), 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) [2021-12-15 13:57:37,364 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2021-12-15 13:57:37,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-15 13:57:37,365 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:37,365 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:37,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-15 13:57:37,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-15 13:57:37,565 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 13:57:37,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:37,565 INFO L85 PathProgramCache]: Analyzing trace with hash -894897563, now seen corresponding path program 5 times [2021-12-15 13:57:37,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:37,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380211896] [2021-12-15 13:57:37,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:37,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:37,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:37,780 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 73 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:37,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:37,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380211896] [2021-12-15 13:57:37,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380211896] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:37,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939848607] [2021-12-15 13:57:37,780 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 13:57:37,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:37,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:37,781 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:57:37,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-15 13:57:38,027 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-15 13:57:38,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:57:38,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-15 13:57:38,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:38,056 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-15 13:57:38,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-15 13:57:38,607 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 98 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:38,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:39,010 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 98 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:39,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939848607] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:39,011 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:39,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 47 [2021-12-15 13:57:39,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582715346] [2021-12-15 13:57:39,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:39,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-15 13:57:39,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:39,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-15 13:57:39,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=1747, Unknown=0, NotChecked=0, Total=2162 [2021-12-15 13:57:39,012 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand has 47 states, 47 states have (on average 3.4680851063829787) internal successors, (163), 47 states have internal predecessors, (163), 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) [2021-12-15 13:57:39,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:39,270 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2021-12-15 13:57:39,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-15 13:57:39,270 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.4680851063829787) internal successors, (163), 47 states have internal predecessors, (163), 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 [2021-12-15 13:57:39,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:39,271 INFO L225 Difference]: With dead ends: 113 [2021-12-15 13:57:39,271 INFO L226 Difference]: Without dead ends: 82 [2021-12-15 13:57:39,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=661, Invalid=2419, Unknown=0, NotChecked=0, Total=3080 [2021-12-15 13:57:39,281 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 115 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:39,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 97 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:57:39,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-15 13:57:39,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2021-12-15 13:57:39,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 77 states have (on average 1.051948051948052) internal successors, (81), 78 states have internal predecessors, (81), 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) [2021-12-15 13:57:39,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2021-12-15 13:57:39,284 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 66 [2021-12-15 13:57:39,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:39,284 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2021-12-15 13:57:39,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.4680851063829787) internal successors, (163), 47 states have internal predecessors, (163), 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) [2021-12-15 13:57:39,284 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2021-12-15 13:57:39,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-15 13:57:39,285 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:39,285 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:39,302 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-12-15 13:57:39,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:39,487 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 13:57:39,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:39,488 INFO L85 PathProgramCache]: Analyzing trace with hash 926679874, now seen corresponding path program 6 times [2021-12-15 13:57:39,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:39,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908789949] [2021-12-15 13:57:39,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:39,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:39,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:39,714 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 66 proven. 152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:39,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:39,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908789949] [2021-12-15 13:57:39,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908789949] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:39,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582805816] [2021-12-15 13:57:39,715 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 13:57:39,715 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:39,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:39,716 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:57:39,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-15 13:57:40,042 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-12-15 13:57:40,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:57:40,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 72 conjunts are in the unsatisfiable core [2021-12-15 13:57:40,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:40,067 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 [2021-12-15 13:57:40,071 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 [2021-12-15 13:57:40,798 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 91 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:40,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:41,557 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 120 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:41,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582805816] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:41,557 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:41,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 54 [2021-12-15 13:57:41,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936861900] [2021-12-15 13:57:41,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:41,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-15 13:57:41,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:41,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-15 13:57:41,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=2569, Unknown=0, NotChecked=0, Total=2970 [2021-12-15 13:57:41,559 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand has 55 states, 54 states have (on average 3.740740740740741) internal successors, (202), 55 states have internal predecessors, (202), 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) [2021-12-15 13:57:42,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:42,364 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2021-12-15 13:57:42,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-15 13:57:42,364 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 3.740740740740741) internal successors, (202), 55 states have internal predecessors, (202), 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 70 [2021-12-15 13:57:42,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:42,365 INFO L225 Difference]: With dead ends: 79 [2021-12-15 13:57:42,365 INFO L226 Difference]: Without dead ends: 79 [2021-12-15 13:57:42,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1000, Invalid=4256, Unknown=0, NotChecked=0, Total=5256 [2021-12-15 13:57:42,366 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 320 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:42,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 223 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 13:57:42,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-12-15 13:57:42,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-12-15 13:57:42,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 78 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:42,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2021-12-15 13:57:42,368 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 70 [2021-12-15 13:57:42,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:42,368 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2021-12-15 13:57:42,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 3.740740740740741) internal successors, (202), 55 states have internal predecessors, (202), 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) [2021-12-15 13:57:42,368 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2021-12-15 13:57:42,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-15 13:57:42,369 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:42,369 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:42,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-15 13:57:42,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:42,571 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 13:57:42,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:42,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1730266887, now seen corresponding path program 7 times [2021-12-15 13:57:42,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:42,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252926465] [2021-12-15 13:57:42,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:42,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:42,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:42,825 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 99 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:42,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:42,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252926465] [2021-12-15 13:57:42,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252926465] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:42,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176532358] [2021-12-15 13:57:42,825 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-15 13:57:42,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:42,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:42,827 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:57:42,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-15 13:57:42,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:42,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-15 13:57:42,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:42,947 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-15 13:57:42,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-15 13:57:43,507 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 128 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:43,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:43,954 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 120 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:43,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176532358] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:43,955 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:43,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 52 [2021-12-15 13:57:43,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092522489] [2021-12-15 13:57:43,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:43,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-15 13:57:43,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:43,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-15 13:57:43,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=503, Invalid=2149, Unknown=0, NotChecked=0, Total=2652 [2021-12-15 13:57:43,956 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand has 52 states, 52 states have (on average 3.480769230769231) internal successors, (181), 52 states have internal predecessors, (181), 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) [2021-12-15 13:57:44,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:44,261 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2021-12-15 13:57:44,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-15 13:57:44,261 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.480769230769231) internal successors, (181), 52 states have internal predecessors, (181), 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 74 [2021-12-15 13:57:44,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:44,262 INFO L225 Difference]: With dead ends: 121 [2021-12-15 13:57:44,262 INFO L226 Difference]: Without dead ends: 86 [2021-12-15 13:57:44,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=800, Invalid=2982, Unknown=0, NotChecked=0, Total=3782 [2021-12-15 13:57:44,263 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 103 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:44,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 113 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:57:44,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-15 13:57:44,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2021-12-15 13:57:44,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 81 states have (on average 1.037037037037037) internal successors, (84), 82 states have internal predecessors, (84), 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) [2021-12-15 13:57:44,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2021-12-15 13:57:44,265 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 74 [2021-12-15 13:57:44,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:44,265 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2021-12-15 13:57:44,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.480769230769231) internal successors, (181), 52 states have internal predecessors, (181), 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) [2021-12-15 13:57:44,266 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2021-12-15 13:57:44,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-15 13:57:44,266 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:44,266 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:44,282 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-15 13:57:44,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:44,471 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 13:57:44,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:44,472 INFO L85 PathProgramCache]: Analyzing trace with hash -692540700, now seen corresponding path program 8 times [2021-12-15 13:57:44,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:44,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476143961] [2021-12-15 13:57:44,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:44,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:44,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:44,756 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 91 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:44,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:44,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476143961] [2021-12-15 13:57:44,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476143961] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:44,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954769630] [2021-12-15 13:57:44,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 13:57:44,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:44,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:44,757 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:57:44,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-15 13:57:44,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 13:57:44,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:57:44,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-15 13:57:44,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:44,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 13:57:44,885 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 [2021-12-15 13:57:44,887 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 [2021-12-15 13:57:45,542 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 120 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:45,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:46,375 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 153 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:46,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954769630] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:46,375 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:46,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 59 [2021-12-15 13:57:46,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019050969] [2021-12-15 13:57:46,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:46,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-12-15 13:57:46,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:46,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-12-15 13:57:46,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=431, Invalid=3109, Unknown=0, NotChecked=0, Total=3540 [2021-12-15 13:57:46,377 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand has 60 states, 59 states have (on average 3.8135593220338984) internal successors, (225), 60 states have internal predecessors, (225), 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) [2021-12-15 13:57:47,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:47,251 INFO L93 Difference]: Finished difference Result 86 states and 87 transitions. [2021-12-15 13:57:47,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-15 13:57:47,251 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 3.8135593220338984) internal successors, (225), 60 states have internal predecessors, (225), 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 78 [2021-12-15 13:57:47,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:47,251 INFO L225 Difference]: With dead ends: 86 [2021-12-15 13:57:47,251 INFO L226 Difference]: Without dead ends: 86 [2021-12-15 13:57:47,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1337 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1112, Invalid=5050, Unknown=0, NotChecked=0, Total=6162 [2021-12-15 13:57:47,252 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 238 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 1154 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 1227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:47,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 415 Invalid, 1227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1154 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 13:57:47,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-15 13:57:47,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2021-12-15 13:57:47,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 83 states have internal predecessors, (85), 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) [2021-12-15 13:57:47,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2021-12-15 13:57:47,254 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 78 [2021-12-15 13:57:47,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:47,254 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2021-12-15 13:57:47,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 3.8135593220338984) internal successors, (225), 60 states have internal predecessors, (225), 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) [2021-12-15 13:57:47,254 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2021-12-15 13:57:47,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-15 13:57:47,255 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:47,255 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:47,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-15 13:57:47,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:47,459 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 13:57:47,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:47,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1542890378, now seen corresponding path program 10 times [2021-12-15 13:57:47,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:47,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443597955] [2021-12-15 13:57:47,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:47,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:47,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:47,925 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 17 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:47,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:47,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443597955] [2021-12-15 13:57:47,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443597955] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:47,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370761381] [2021-12-15 13:57:47,926 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 13:57:47,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:47,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:47,927 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:57:47,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-15 13:57:48,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 13:57:48,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:57:48,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 107 conjunts are in the unsatisfiable core [2021-12-15 13:57:48,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:48,058 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-15 13:57:48,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-15 13:57:48,066 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 [2021-12-15 13:57:48,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-15 13:57:48,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2021-12-15 13:57:48,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-15 13:57:48,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-15 13:57:48,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-15 13:57:48,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-15 13:57:48,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-15 13:57:48,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-15 13:57:49,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-15 13:57:49,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-15 13:57:49,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2021-12-15 13:57:49,175 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 17 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:49,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:49,232 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1164 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1164) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 1)) 0)) is different from false [2021-12-15 13:57:49,238 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1164 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1164) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 2)) 0)) is different from false [2021-12-15 13:57:49,248 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1164 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1164) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 3)) 0)) is different from false [2021-12-15 13:57:49,259 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1164 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1164) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 4)) 0)) is different from false [2021-12-15 13:57:49,270 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1164 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1164) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 5)) 0)) is different from false [2021-12-15 13:57:49,280 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1164 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1164) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 6)) 0)) is different from false [2021-12-15 13:57:49,292 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1164 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1164) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 7)) 0)) is different from false [2021-12-15 13:57:49,305 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1164 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1164) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 8)) 0)) is different from false [2021-12-15 13:57:49,401 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:57:49,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-15 13:57:49,405 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:57:49,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-15 13:57:49,407 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 11 treesize of output 7 [2021-12-15 13:57:50,212 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 17 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 134 not checked. [2021-12-15 13:57:50,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370761381] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:50,213 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:50,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 27] total 70 [2021-12-15 13:57:50,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697954367] [2021-12-15 13:57:50,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:50,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-12-15 13:57:50,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:50,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-12-15 13:57:50,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=3613, Unknown=8, NotChecked=1016, Total=4830 [2021-12-15 13:57:50,216 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand has 70 states, 70 states have (on average 3.2) internal successors, (224), 70 states have internal predecessors, (224), 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) [2021-12-15 13:57:52,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:52,108 INFO L93 Difference]: Finished difference Result 128 states and 129 transitions. [2021-12-15 13:57:52,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-15 13:57:52,108 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 3.2) internal successors, (224), 70 states have internal predecessors, (224), 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 81 [2021-12-15 13:57:52,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:52,109 INFO L225 Difference]: With dead ends: 128 [2021-12-15 13:57:52,109 INFO L226 Difference]: Without dead ends: 91 [2021-12-15 13:57:52,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 122 SyntacticMatches, 12 SemanticMatches, 94 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 1345 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=456, Invalid=7224, Unknown=8, NotChecked=1432, Total=9120 [2021-12-15 13:57:52,109 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 79 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 2430 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 922 SdHoareTripleChecker+Invalid, 3187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 2430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 713 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:52,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 922 Invalid, 3187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 2430 Invalid, 0 Unknown, 713 Unchecked, 0.8s Time] [2021-12-15 13:57:52,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-15 13:57:52,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2021-12-15 13:57:52,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 86 states have (on average 1.0348837209302326) internal successors, (89), 87 states have internal predecessors, (89), 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) [2021-12-15 13:57:52,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2021-12-15 13:57:52,112 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 81 [2021-12-15 13:57:52,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:52,112 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2021-12-15 13:57:52,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 3.2) internal successors, (224), 70 states have internal predecessors, (224), 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) [2021-12-15 13:57:52,112 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2021-12-15 13:57:52,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-15 13:57:52,112 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:52,112 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:52,129 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-15 13:57:52,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:52,327 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 13:57:52,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:52,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1345446643, now seen corresponding path program 11 times [2021-12-15 13:57:52,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:52,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442641015] [2021-12-15 13:57:52,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:52,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:52,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:52,655 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 120 proven. 223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:52,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:52,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442641015] [2021-12-15 13:57:52,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442641015] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:52,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036267833] [2021-12-15 13:57:52,655 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 13:57:52,655 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:52,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:52,663 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:57:52,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-15 13:57:53,176 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-12-15 13:57:53,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:57:53,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-15 13:57:53,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:53,214 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-15 13:57:53,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-15 13:57:53,857 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 153 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:53,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:54,740 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 190 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:54,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036267833] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:54,741 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:54,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 63 [2021-12-15 13:57:54,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467865807] [2021-12-15 13:57:54,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:54,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-12-15 13:57:54,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:54,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-12-15 13:57:54,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=558, Invalid=3474, Unknown=0, NotChecked=0, Total=4032 [2021-12-15 13:57:54,742 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand has 64 states, 63 states have (on average 3.857142857142857) internal successors, (243), 64 states have internal predecessors, (243), 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) [2021-12-15 13:57:55,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:55,342 INFO L93 Difference]: Finished difference Result 95 states and 96 transitions. [2021-12-15 13:57:55,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-15 13:57:55,343 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 3.857142857142857) internal successors, (243), 64 states have internal predecessors, (243), 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 85 [2021-12-15 13:57:55,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:55,343 INFO L225 Difference]: With dead ends: 95 [2021-12-15 13:57:55,343 INFO L226 Difference]: Without dead ends: 95 [2021-12-15 13:57:55,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1745 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1062, Invalid=4638, Unknown=0, NotChecked=0, Total=5700 [2021-12-15 13:57:55,344 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 314 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 1034 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1034 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:55,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 369 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1034 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 13:57:55,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-15 13:57:55,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2021-12-15 13:57:55,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 89 states have (on average 1.0337078651685394) internal successors, (92), 90 states have internal predecessors, (92), 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) [2021-12-15 13:57:55,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2021-12-15 13:57:55,346 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 85 [2021-12-15 13:57:55,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:55,346 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2021-12-15 13:57:55,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 3.857142857142857) internal successors, (243), 64 states have internal predecessors, (243), 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) [2021-12-15 13:57:55,346 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2021-12-15 13:57:55,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-15 13:57:55,347 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:55,347 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:55,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-12-15 13:57:55,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-12-15 13:57:55,555 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 13:57:55,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:55,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1240827014, now seen corresponding path program 9 times [2021-12-15 13:57:55,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:55,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624680770] [2021-12-15 13:57:55,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:55,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:55,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:55,853 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 120 proven. 232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:55,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:55,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624680770] [2021-12-15 13:57:55,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624680770] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:55,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233429355] [2021-12-15 13:57:55,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 13:57:55,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:55,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:55,854 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:57:55,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-15 13:57:56,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-12-15 13:57:56,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:57:56,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 88 conjunts are in the unsatisfiable core [2021-12-15 13:57:56,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:56,431 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 [2021-12-15 13:57:56,436 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 [2021-12-15 13:57:57,312 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-15 13:57:57,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:58,166 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-15 13:57:58,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233429355] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:58,166 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:58,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 14, 14] total 48 [2021-12-15 13:57:58,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138344437] [2021-12-15 13:57:58,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:58,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-15 13:57:58,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:58,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-15 13:57:58,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=2037, Unknown=0, NotChecked=0, Total=2352 [2021-12-15 13:57:58,168 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand has 49 states, 48 states have (on average 3.7083333333333335) internal successors, (178), 49 states have internal predecessors, (178), 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) [2021-12-15 13:58:00,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:58:00,916 INFO L93 Difference]: Finished difference Result 137 states and 138 transitions. [2021-12-15 13:58:00,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-15 13:58:00,917 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 3.7083333333333335) internal successors, (178), 49 states have internal predecessors, (178), 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 86 [2021-12-15 13:58:00,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:58:00,917 INFO L225 Difference]: With dead ends: 137 [2021-12-15 13:58:00,917 INFO L226 Difference]: Without dead ends: 137 [2021-12-15 13:58:00,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1445 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1484, Invalid=6526, Unknown=0, NotChecked=0, Total=8010 [2021-12-15 13:58:00,918 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 367 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 1293 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 1453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 13:58:00,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 476 Invalid, 1453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1293 Invalid, 0 Unknown, 57 Unchecked, 0.5s Time] [2021-12-15 13:58:00,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-12-15 13:58:00,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 128. [2021-12-15 13:58:00,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 126 states have (on average 1.0952380952380953) internal successors, (138), 127 states have internal predecessors, (138), 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) [2021-12-15 13:58:00,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 138 transitions. [2021-12-15 13:58:00,920 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 138 transitions. Word has length 86 [2021-12-15 13:58:00,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:58:00,921 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 138 transitions. [2021-12-15 13:58:00,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 3.7083333333333335) internal successors, (178), 49 states have internal predecessors, (178), 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) [2021-12-15 13:58:00,921 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 138 transitions. [2021-12-15 13:58:00,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-15 13:58:00,921 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:58:00,921 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:58:00,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-12-15 13:58:01,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-12-15 13:58:01,140 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 13:58:01,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:58:01,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1305948504, now seen corresponding path program 12 times [2021-12-15 13:58:01,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:58:01,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739722103] [2021-12-15 13:58:01,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:58:01,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:58:01,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:58:01,741 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 19 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:58:01,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:58:01,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739722103] [2021-12-15 13:58:01,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739722103] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:58:01,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343393323] [2021-12-15 13:58:01,742 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 13:58:01,742 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:58:01,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:58:01,746 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:58:01,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-15 13:58:03,154 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-12-15 13:58:03,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:58:03,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 82 conjunts are in the unsatisfiable core [2021-12-15 13:58:03,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:58:03,178 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-15 13:58:03,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-15 13:58:03,185 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 [2021-12-15 13:58:03,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 11 [2021-12-15 13:58:03,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-15 13:58:03,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-15 13:58:03,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-15 13:58:03,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-15 13:58:03,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-15 13:58:03,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-15 13:58:03,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-15 13:58:03,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-15 13:58:03,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-15 13:58:03,643 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:58:03,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-12-15 13:58:03,745 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2021-12-15 13:58:03,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:58:04,486 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:58:04,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2021-12-15 13:58:04,493 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:58:04,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2021-12-15 13:58:04,497 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 9 treesize of output 7 [2021-12-15 13:58:05,062 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2021-12-15 13:58:05,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343393323] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:58:05,062 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:58:05,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 8, 8] total 41 [2021-12-15 13:58:05,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346112475] [2021-12-15 13:58:05,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:58:05,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-15 13:58:05,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:58:05,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-15 13:58:05,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1509, Unknown=33, NotChecked=0, Total=1640 [2021-12-15 13:58:05,064 INFO L87 Difference]: Start difference. First operand 128 states and 138 transitions. Second operand has 41 states, 41 states have (on average 3.097560975609756) internal successors, (127), 41 states have internal predecessors, (127), 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) [2021-12-15 13:58:08,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:58:08,146 INFO L93 Difference]: Finished difference Result 172 states and 173 transitions. [2021-12-15 13:58:08,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-12-15 13:58:08,146 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.097560975609756) internal successors, (127), 41 states have internal predecessors, (127), 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 89 [2021-12-15 13:58:08,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:58:08,147 INFO L225 Difference]: With dead ends: 172 [2021-12-15 13:58:08,147 INFO L226 Difference]: Without dead ends: 131 [2021-12-15 13:58:08,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 173 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1719 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1019, Invalid=8830, Unknown=51, NotChecked=0, Total=9900 [2021-12-15 13:58:08,148 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 89 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 1981 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 2158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 13:58:08,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 475 Invalid, 2158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1981 Invalid, 0 Unknown, 96 Unchecked, 0.7s Time] [2021-12-15 13:58:08,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-15 13:58:08,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-12-15 13:58:08,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.0153846153846153) internal successors, (132), 130 states have internal predecessors, (132), 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) [2021-12-15 13:58:08,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2021-12-15 13:58:08,150 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 89 [2021-12-15 13:58:08,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:58:08,151 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2021-12-15 13:58:08,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.097560975609756) internal successors, (127), 41 states have internal predecessors, (127), 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) [2021-12-15 13:58:08,151 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2021-12-15 13:58:08,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-15 13:58:08,151 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:58:08,152 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:58:08,175 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-12-15 13:58:08,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-12-15 13:58:08,370 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 13:58:08,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:58:08,371 INFO L85 PathProgramCache]: Analyzing trace with hash -94208747, now seen corresponding path program 10 times [2021-12-15 13:58:08,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:58:08,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078945668] [2021-12-15 13:58:08,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:58:08,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:58:08,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:58:08,752 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 561 proven. 272 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-15 13:58:08,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:58:08,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078945668] [2021-12-15 13:58:08,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078945668] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:58:08,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213143192] [2021-12-15 13:58:08,753 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 13:58:08,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:58:08,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:58:08,754 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:58:08,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-15 13:58:08,911 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 13:58:08,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:58:08,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-15 13:58:08,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:58:08,935 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-15 13:58:08,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-15 13:58:09,790 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 602 proven. 231 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-15 13:58:09,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:58:10,435 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 591 proven. 242 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-15 13:58:10,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213143192] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:58:10,435 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:58:10,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 67 [2021-12-15 13:58:10,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466349128] [2021-12-15 13:58:10,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:58:10,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-12-15 13:58:10,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:58:10,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-12-15 13:58:10,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=827, Invalid=3595, Unknown=0, NotChecked=0, Total=4422 [2021-12-15 13:58:10,437 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand has 67 states, 67 states have (on average 3.656716417910448) internal successors, (245), 67 states have internal predecessors, (245), 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) [2021-12-15 13:58:10,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:58:10,866 INFO L93 Difference]: Finished difference Result 185 states and 186 transitions. [2021-12-15 13:58:10,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-15 13:58:10,867 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.656716417910448) internal successors, (245), 67 states have internal predecessors, (245), 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 [2021-12-15 13:58:10,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:58:10,867 INFO L225 Difference]: With dead ends: 185 [2021-12-15 13:58:10,867 INFO L226 Difference]: Without dead ends: 138 [2021-12-15 13:58:10,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 220 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1535 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1310, Invalid=5010, Unknown=0, NotChecked=0, Total=6320 [2021-12-15 13:58:10,868 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 113 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 13:58:10,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 154 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 13:58:10,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-12-15 13:58:10,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 135. [2021-12-15 13:58:10,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.0149253731343284) internal successors, (136), 134 states have internal predecessors, (136), 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) [2021-12-15 13:58:10,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2021-12-15 13:58:10,870 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 130 [2021-12-15 13:58:10,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:58:10,870 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2021-12-15 13:58:10,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.656716417910448) internal successors, (245), 67 states have internal predecessors, (245), 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) [2021-12-15 13:58:10,871 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2021-12-15 13:58:10,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-15 13:58:10,871 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:58:10,871 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:58:10,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-12-15 13:58:11,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:58:11,087 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 13:58:11,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:58:11,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1690314226, now seen corresponding path program 11 times [2021-12-15 13:58:11,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:58:11,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334449496] [2021-12-15 13:58:11,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:58:11,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:58:11,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:58:11,463 INFO L134 CoverageAnalysis]: Checked inductivity of 998 backedges. 586 proven. 321 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-15 13:58:11,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:58:11,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334449496] [2021-12-15 13:58:11,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334449496] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:58:11,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800173157] [2021-12-15 13:58:11,464 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 13:58:11,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:58:11,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:58:11,465 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:58:11,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process