./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/openbsd_cstrlen-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version ae007674 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/openbsd_cstrlen-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 dd76b7822e4f01d656aa547f942373edd42b5cbb2c90dd9f0d7299ee64d98734 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 05:45:42,727 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 05:45:42,729 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 05:45:42,754 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 05:45:42,755 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 05:45:42,759 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 05:45:42,762 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 05:45:42,766 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 05:45:42,768 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 05:45:42,769 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 05:45:42,770 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 05:45:42,772 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 05:45:42,773 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 05:45:42,775 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 05:45:42,776 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 05:45:42,777 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 05:45:42,779 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 05:45:42,782 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 05:45:42,784 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 05:45:42,785 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 05:45:42,786 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 05:45:42,787 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 05:45:42,788 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 05:45:42,788 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 05:45:42,794 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 05:45:42,798 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 05:45:42,798 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 05:45:42,799 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 05:45:42,800 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 05:45:42,800 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 05:45:42,801 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 05:45:42,802 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 05:45:42,803 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 05:45:42,804 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 05:45:42,805 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 05:45:42,805 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 05:45:42,806 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 05:45:42,806 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 05:45:42,806 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 05:45:42,807 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 05:45:42,808 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 05:45:42,811 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-28 05:45:42,841 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 05:45:42,841 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 05:45:42,842 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 05:45:42,842 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 05:45:42,843 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 05:45:42,843 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 05:45:42,844 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 05:45:42,845 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 05:45:42,845 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 05:45:42,845 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 05:45:42,846 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 05:45:42,846 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-28 05:45:42,846 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 05:45:42,846 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 05:45:42,846 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 05:45:42,847 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-28 05:45:42,847 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-28 05:45:42,847 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-28 05:45:42,847 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 05:45:42,847 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-28 05:45:42,848 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 05:45:42,848 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 05:45:42,848 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 05:45:42,848 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 05:45:42,848 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 05:45:42,848 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 05:45:42,849 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 05:45:42,849 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 05:45:42,855 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 05:45:42,855 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 05:45:42,855 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dd76b7822e4f01d656aa547f942373edd42b5cbb2c90dd9f0d7299ee64d98734 [2021-12-28 05:45:43,151 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 05:45:43,179 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 05:45:43,182 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 05:45:43,183 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 05:45:43,184 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 05:45:43,185 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cstrlen-alloca-1.i [2021-12-28 05:45:43,235 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fd0e45f9/277f19d342b74bad934794ac8e374a01/FLAGa962d037e [2021-12-28 05:45:43,698 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 05:45:43,702 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrlen-alloca-1.i [2021-12-28 05:45:43,726 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fd0e45f9/277f19d342b74bad934794ac8e374a01/FLAGa962d037e [2021-12-28 05:45:44,229 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fd0e45f9/277f19d342b74bad934794ac8e374a01 [2021-12-28 05:45:44,230 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 05:45:44,231 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 05:45:44,233 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 05:45:44,233 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 05:45:44,240 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 05:45:44,241 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 05:45:44" (1/1) ... [2021-12-28 05:45:44,242 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4050846d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:45:44, skipping insertion in model container [2021-12-28 05:45:44,242 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 05:45:44" (1/1) ... [2021-12-28 05:45:44,248 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 05:45:44,288 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 05:45:44,618 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 05:45:44,627 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 05:45:44,673 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 05:45:44,698 INFO L208 MainTranslator]: Completed translation [2021-12-28 05:45:44,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:45:44 WrapperNode [2021-12-28 05:45:44,698 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 05:45:44,700 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 05:45:44,700 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 05:45:44,700 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 05:45:44,706 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:45:44" (1/1) ... [2021-12-28 05:45:44,728 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:45:44" (1/1) ... [2021-12-28 05:45:44,749 INFO L137 Inliner]: procedures = 117, calls = 9, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 47 [2021-12-28 05:45:44,749 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 05:45:44,750 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 05:45:44,750 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 05:45:44,751 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 05:45:44,757 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:45:44" (1/1) ... [2021-12-28 05:45:44,758 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:45:44" (1/1) ... [2021-12-28 05:45:44,769 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:45:44" (1/1) ... [2021-12-28 05:45:44,769 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:45:44" (1/1) ... [2021-12-28 05:45:44,776 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:45:44" (1/1) ... [2021-12-28 05:45:44,779 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:45:44" (1/1) ... [2021-12-28 05:45:44,780 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:45:44" (1/1) ... [2021-12-28 05:45:44,781 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 05:45:44,782 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 05:45:44,782 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 05:45:44,782 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 05:45:44,783 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:45:44" (1/1) ... [2021-12-28 05:45:44,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 05:45:44,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:45:44,816 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-28 05:45:44,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-28 05:45:44,864 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-28 05:45:44,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-28 05:45:44,865 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-28 05:45:44,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-28 05:45:44,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 05:45:44,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 05:45:44,951 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 05:45:44,953 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 05:45:45,106 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 05:45:45,110 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 05:45:45,111 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-28 05:45:45,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 05:45:45 BoogieIcfgContainer [2021-12-28 05:45:45,112 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 05:45:45,113 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 05:45:45,114 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 05:45:45,120 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 05:45:45,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 05:45:44" (1/3) ... [2021-12-28 05:45:45,120 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27434e9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 05:45:45, skipping insertion in model container [2021-12-28 05:45:45,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:45:44" (2/3) ... [2021-12-28 05:45:45,121 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27434e9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 05:45:45, skipping insertion in model container [2021-12-28 05:45:45,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 05:45:45" (3/3) ... [2021-12-28 05:45:45,122 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrlen-alloca-1.i [2021-12-28 05:45:45,126 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 05:45:45,126 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-12-28 05:45:45,168 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 05:45:45,174 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-28 05:45:45,175 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-12-28 05:45:45,187 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 24 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) [2021-12-28 05:45:45,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-28 05:45:45,191 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:45,192 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-28 05:45:45,192 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-28 05:45:45,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:45,197 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2021-12-28 05:45:45,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:45:45,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709064964] [2021-12-28 05:45:45,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:45,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:45:45,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:45,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:45,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:45:45,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709064964] [2021-12-28 05:45:45,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709064964] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:45:45,390 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:45:45,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 05:45:45,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909069655] [2021-12-28 05:45:45,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:45:45,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 05:45:45,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:45:45,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 05:45:45,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:45:45,423 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 24 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) 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) [2021-12-28 05:45:45,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:45,470 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2021-12-28 05:45:45,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 05:45:45,473 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 [2021-12-28 05:45:45,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:45,478 INFO L225 Difference]: With dead ends: 42 [2021-12-28 05:45:45,479 INFO L226 Difference]: Without dead ends: 38 [2021-12-28 05:45:45,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:45:45,485 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 33 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:45,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 42 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:45:45,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-28 05:45:45,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 25. [2021-12-28 05:45:45,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.5) internal successors, (27), 24 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) [2021-12-28 05:45:45,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-12-28 05:45:45,509 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 6 [2021-12-28 05:45:45,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:45,509 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-12-28 05:45:45,509 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) [2021-12-28 05:45:45,510 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-12-28 05:45:45,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-28 05:45:45,513 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:45,514 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-28 05:45:45,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 05:45:45,514 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-28 05:45:45,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:45,516 INFO L85 PathProgramCache]: Analyzing trace with hash 889508820, now seen corresponding path program 1 times [2021-12-28 05:45:45,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:45:45,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239541092] [2021-12-28 05:45:45,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:45,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:45:45,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:45,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:45,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:45:45,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239541092] [2021-12-28 05:45:45,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239541092] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:45:45,553 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:45:45,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 05:45:45,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197263186] [2021-12-28 05:45:45,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:45:45,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 05:45:45,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:45:45,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 05:45:45,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 05:45:45,556 INFO L87 Difference]: Start difference. First operand 25 states and 27 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) [2021-12-28 05:45:45,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:45,580 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2021-12-28 05:45:45,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 05:45:45,580 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 [2021-12-28 05:45:45,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:45,583 INFO L225 Difference]: With dead ends: 23 [2021-12-28 05:45:45,583 INFO L226 Difference]: Without dead ends: 23 [2021-12-28 05:45:45,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 05:45:45,588 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 15 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:45,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 17 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:45:45,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-28 05:45:45,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-12-28 05:45:45,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 22 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) [2021-12-28 05:45:45,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-12-28 05:45:45,594 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 6 [2021-12-28 05:45:45,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:45,595 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-12-28 05:45:45,596 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) [2021-12-28 05:45:45,596 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-12-28 05:45:45,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-28 05:45:45,596 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:45,596 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-28 05:45:45,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 05:45:45,597 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-28 05:45:45,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:45,599 INFO L85 PathProgramCache]: Analyzing trace with hash 889508821, now seen corresponding path program 1 times [2021-12-28 05:45:45,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:45:45,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85776068] [2021-12-28 05:45:45,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:45,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:45:45,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:45,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:45,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:45:45,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85776068] [2021-12-28 05:45:45,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85776068] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:45:45,686 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:45:45,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 05:45:45,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236079494] [2021-12-28 05:45:45,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:45:45,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 05:45:45,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:45:45,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 05:45:45,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:45:45,690 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:45,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:45,715 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2021-12-28 05:45:45,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 05:45:45,716 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-28 05:45:45,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:45,717 INFO L225 Difference]: With dead ends: 22 [2021-12-28 05:45:45,717 INFO L226 Difference]: Without dead ends: 22 [2021-12-28 05:45:45,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:45:45,723 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 18 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:45,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 15 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:45:45,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-28 05:45:45,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-12-28 05:45:45,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 21 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) [2021-12-28 05:45:45,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-12-28 05:45:45,727 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 6 [2021-12-28 05:45:45,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:45,727 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-12-28 05:45:45,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:45,728 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-12-28 05:45:45,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-28 05:45:45,728 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:45,728 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-28 05:45:45,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 05:45:45,728 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-28 05:45:45,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:45,729 INFO L85 PathProgramCache]: Analyzing trace with hash 889568456, now seen corresponding path program 1 times [2021-12-28 05:45:45,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:45:45,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756322066] [2021-12-28 05:45:45,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:45,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:45:45,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:45,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:45,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:45:45,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756322066] [2021-12-28 05:45:45,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756322066] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:45:45,833 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:45:45,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 05:45:45,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7698848] [2021-12-28 05:45:45,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:45:45,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 05:45:45,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:45:45,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 05:45:45,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 05:45:45,835 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:45,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:45,873 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2021-12-28 05:45:45,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 05:45:45,874 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-28 05:45:45,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:45,876 INFO L225 Difference]: With dead ends: 37 [2021-12-28 05:45:45,876 INFO L226 Difference]: Without dead ends: 37 [2021-12-28 05:45:45,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 05:45:45,880 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 47 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 25 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 [2021-12-28 05:45:45,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 25 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:45:45,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-28 05:45:45,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2021-12-28 05:45:45,883 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) [2021-12-28 05:45:45,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-12-28 05:45:45,884 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 6 [2021-12-28 05:45:45,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:45,884 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-12-28 05:45:45,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:45,885 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-12-28 05:45:45,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-28 05:45:45,885 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:45,885 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:45,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 05:45:45,886 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-28 05:45:45,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:45,886 INFO L85 PathProgramCache]: Analyzing trace with hash 119484120, now seen corresponding path program 1 times [2021-12-28 05:45:45,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:45:45,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411344077] [2021-12-28 05:45:45,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:45,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:45:45,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:45,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:45,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:45:45,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411344077] [2021-12-28 05:45:45,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411344077] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:45:45,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:45:45,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 05:45:45,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290654172] [2021-12-28 05:45:45,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:45:45,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 05:45:45,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:45:45,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 05:45:45,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:45:45,927 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:45,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:45,960 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2021-12-28 05:45:45,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 05:45:45,961 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-28 05:45:45,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:45,962 INFO L225 Difference]: With dead ends: 23 [2021-12-28 05:45:45,963 INFO L226 Difference]: Without dead ends: 23 [2021-12-28 05:45:45,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 05:45:45,964 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 17 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 21 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 [2021-12-28 05:45:45,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 21 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:45:45,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-28 05:45:45,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-12-28 05:45:45,966 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) [2021-12-28 05:45:45,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-12-28 05:45:45,967 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 8 [2021-12-28 05:45:45,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:45,967 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-12-28 05:45:45,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:45,968 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-12-28 05:45:45,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-28 05:45:45,968 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:45,968 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:45,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 05:45:45,969 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-28 05:45:45,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:45,970 INFO L85 PathProgramCache]: Analyzing trace with hash 119484121, now seen corresponding path program 1 times [2021-12-28 05:45:45,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:45:45,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769276694] [2021-12-28 05:45:45,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:45,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:45:45,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:46,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:46,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:45:46,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769276694] [2021-12-28 05:45:46,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769276694] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:45:46,074 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:45:46,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 05:45:46,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861631603] [2021-12-28 05:45:46,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:45:46,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 05:45:46,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:45:46,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 05:45:46,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-28 05:45:46,075 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:46,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:46,123 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-12-28 05:45:46,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 05:45:46,124 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-28 05:45:46,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:46,124 INFO L225 Difference]: With dead ends: 30 [2021-12-28 05:45:46,125 INFO L226 Difference]: Without dead ends: 30 [2021-12-28 05:45:46,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-28 05:45:46,126 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 30 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:46,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 25 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:45:46,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-28 05:45:46,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2021-12-28 05:45:46,131 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) [2021-12-28 05:45:46,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-12-28 05:45:46,132 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 8 [2021-12-28 05:45:46,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:46,132 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-12-28 05:45:46,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:46,133 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-12-28 05:45:46,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-28 05:45:46,133 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:46,133 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:46,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 05:45:46,134 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-28 05:45:46,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:46,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2021-12-28 05:45:46,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:45:46,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961041420] [2021-12-28 05:45:46,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:46,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:45:46,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:46,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:46,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:45:46,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961041420] [2021-12-28 05:45:46,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961041420] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:45:46,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567165707] [2021-12-28 05:45:46,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:46,231 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:45:46,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:45:46,235 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 05:45:46,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-28 05:45:46,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:46,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-28 05:45:46,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:45:46,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 05:45:46,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:46,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:45:46,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:46,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567165707] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:45:46,663 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:45:46,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2021-12-28 05:45:46,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761743342] [2021-12-28 05:45:46,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:45:46,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 05:45:46,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:45:46,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 05:45:46,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-12-28 05:45:46,667 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:46,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:46,795 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2021-12-28 05:45:46,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 05:45:46,796 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-28 05:45:46,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:46,797 INFO L225 Difference]: With dead ends: 48 [2021-12-28 05:45:46,797 INFO L226 Difference]: Without dead ends: 48 [2021-12-28 05:45:46,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-12-28 05:45:46,798 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 77 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:46,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 73 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:45:46,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-28 05:45:46,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 21. [2021-12-28 05:45:46,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:46,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-12-28 05:45:46,807 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 10 [2021-12-28 05:45:46,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:46,808 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-12-28 05:45:46,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:46,809 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-12-28 05:45:46,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-28 05:45:46,810 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:46,810 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:46,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-28 05:45:47,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:45:47,027 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-28 05:45:47,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:47,028 INFO L85 PathProgramCache]: Analyzing trace with hash -976458485, now seen corresponding path program 1 times [2021-12-28 05:45:47,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:45:47,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402954391] [2021-12-28 05:45:47,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:47,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:45:47,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:47,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:47,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:45:47,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402954391] [2021-12-28 05:45:47,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402954391] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:45:47,141 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:45:47,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 05:45:47,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551188443] [2021-12-28 05:45:47,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:45:47,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 05:45:47,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:45:47,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 05:45:47,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 05:45:47,144 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) 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) [2021-12-28 05:45:47,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:47,218 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2021-12-28 05:45:47,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 05:45:47,218 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) 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 [2021-12-28 05:45:47,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:47,219 INFO L225 Difference]: With dead ends: 29 [2021-12-28 05:45:47,219 INFO L226 Difference]: Without dead ends: 29 [2021-12-28 05:45:47,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-28 05:45:47,220 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 17 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:47,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 73 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:45:47,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-28 05:45:47,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2021-12-28 05:45:47,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 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) [2021-12-28 05:45:47,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-12-28 05:45:47,222 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 11 [2021-12-28 05:45:47,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:47,223 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-12-28 05:45:47,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) 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) [2021-12-28 05:45:47,223 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-12-28 05:45:47,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-28 05:45:47,223 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:47,224 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:47,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-28 05:45:47,224 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-28 05:45:47,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:47,224 INFO L85 PathProgramCache]: Analyzing trace with hash -296400115, now seen corresponding path program 1 times [2021-12-28 05:45:47,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:45:47,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453564517] [2021-12-28 05:45:47,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:47,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:45:47,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:47,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:47,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:45:47,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453564517] [2021-12-28 05:45:47,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453564517] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:45:47,341 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:45:47,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 05:45:47,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83770906] [2021-12-28 05:45:47,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:45:47,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 05:45:47,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:45:47,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 05:45:47,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-28 05:45:47,343 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:47,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:47,474 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2021-12-28 05:45:47,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 05:45:47,475 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-28 05:45:47,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:47,475 INFO L225 Difference]: With dead ends: 37 [2021-12-28 05:45:47,475 INFO L226 Difference]: Without dead ends: 37 [2021-12-28 05:45:47,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-12-28 05:45:47,476 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 41 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:47,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 60 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:45:47,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-28 05:45:47,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2021-12-28 05:45:47,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 24 states have (on average 1.2083333333333333) 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) [2021-12-28 05:45:47,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-12-28 05:45:47,478 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 11 [2021-12-28 05:45:47,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:47,478 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-12-28 05:45:47,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:47,479 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-12-28 05:45:47,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-28 05:45:47,479 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:47,479 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:47,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-28 05:45:47,479 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-28 05:45:47,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:47,480 INFO L85 PathProgramCache]: Analyzing trace with hash -205497247, now seen corresponding path program 1 times [2021-12-28 05:45:47,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:45:47,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987414656] [2021-12-28 05:45:47,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:47,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:45:47,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:47,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:47,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:45:47,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987414656] [2021-12-28 05:45:47,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987414656] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:45:47,560 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:45:47,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 05:45:47,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184936569] [2021-12-28 05:45:47,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:45:47,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 05:45:47,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:45:47,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 05:45:47,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:45:47,562 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:47,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:47,572 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2021-12-28 05:45:47,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 05:45:47,572 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-28 05:45:47,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:47,572 INFO L225 Difference]: With dead ends: 25 [2021-12-28 05:45:47,572 INFO L226 Difference]: Without dead ends: 16 [2021-12-28 05:45:47,573 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 [2021-12-28 05:45:47,573 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 8 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 26 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 [2021-12-28 05:45:47,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 26 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:45:47,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-12-28 05:45:47,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-12-28 05:45:47,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 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) [2021-12-28 05:45:47,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-12-28 05:45:47,577 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2021-12-28 05:45:47,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:47,577 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-12-28 05:45:47,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:47,577 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-12-28 05:45:47,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-28 05:45:47,578 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:47,578 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:47,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-28 05:45:47,578 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-28 05:45:47,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:47,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1218087850, now seen corresponding path program 1 times [2021-12-28 05:45:47,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:45:47,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136759369] [2021-12-28 05:45:47,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:47,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:45:47,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:47,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:47,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:45:47,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136759369] [2021-12-28 05:45:47,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136759369] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:45:47,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783563817] [2021-12-28 05:45:47,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:47,670 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:45:47,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:45:47,672 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 05:45:47,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-28 05:45:47,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:47,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-28 05:45:47,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:45:47,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:47,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:45:47,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-28 05:45:47,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:47,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783563817] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:45:47,939 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:45:47,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2021-12-28 05:45:47,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899387397] [2021-12-28 05:45:47,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:45:47,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-28 05:45:47,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:45:47,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-28 05:45:47,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-12-28 05:45:47,940 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 16 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) [2021-12-28 05:45:48,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:48,079 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2021-12-28 05:45:48,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 05:45:48,080 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 16 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) Word has length 15 [2021-12-28 05:45:48,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:48,081 INFO L225 Difference]: With dead ends: 24 [2021-12-28 05:45:48,081 INFO L226 Difference]: Without dead ends: 24 [2021-12-28 05:45:48,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2021-12-28 05:45:48,082 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 73 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:48,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 40 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:45:48,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-28 05:45:48,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2021-12-28 05:45:48,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:48,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-12-28 05:45:48,086 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2021-12-28 05:45:48,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:48,087 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-12-28 05:45:48,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 16 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) [2021-12-28 05:45:48,087 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-12-28 05:45:48,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-28 05:45:48,088 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:48,088 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:48,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-28 05:45:48,305 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,SelfDestructingSolverStorable10 [2021-12-28 05:45:48,306 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-28 05:45:48,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:48,306 INFO L85 PathProgramCache]: Analyzing trace with hash -123563366, now seen corresponding path program 2 times [2021-12-28 05:45:48,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:45:48,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699007991] [2021-12-28 05:45:48,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:48,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:45:48,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:48,451 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:48,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:45:48,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699007991] [2021-12-28 05:45:48,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699007991] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:45:48,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638419840] [2021-12-28 05:45:48,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 05:45:48,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:45:48,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:45:48,453 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 05:45:48,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-28 05:45:48,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 05:45:48,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:45:48,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-28 05:45:48,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:45:48,564 INFO L387 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 [2021-12-28 05:45:48,788 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:45:48,788 INFO L387 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 [2021-12-28 05:45:48,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:48,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:45:49,145 INFO L387 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 13 [2021-12-28 05:45:49,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-28 05:45:49,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-28 05:45:49,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:49,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638419840] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:45:49,180 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:45:49,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2021-12-28 05:45:49,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279394030] [2021-12-28 05:45:49,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:45:49,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-28 05:45:49,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:45:49,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-28 05:45:49,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-12-28 05:45:49,182 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:49,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:49,439 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2021-12-28 05:45:49,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-28 05:45:49,440 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-28 05:45:49,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:49,440 INFO L225 Difference]: With dead ends: 38 [2021-12-28 05:45:49,440 INFO L226 Difference]: Without dead ends: 31 [2021-12-28 05:45:49,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=147, Invalid=975, Unknown=0, NotChecked=0, Total=1122 [2021-12-28 05:45:49,441 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 36 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:49,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 93 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 143 Invalid, 0 Unknown, 51 Unchecked, 0.1s Time] [2021-12-28 05:45:49,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-28 05:45:49,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2021-12-28 05:45:49,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.08) internal successors, (27), 25 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) [2021-12-28 05:45:49,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2021-12-28 05:45:49,443 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 18 [2021-12-28 05:45:49,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:49,444 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2021-12-28 05:45:49,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:49,444 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2021-12-28 05:45:49,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-28 05:45:49,444 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:49,444 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:49,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-28 05:45:49,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:45:49,655 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-28 05:45:49,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:49,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1941489159, now seen corresponding path program 3 times [2021-12-28 05:45:49,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:45:49,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510488581] [2021-12-28 05:45:49,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:49,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:45:49,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:49,831 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:49,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:45:49,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510488581] [2021-12-28 05:45:49,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510488581] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:45:49,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401675474] [2021-12-28 05:45:49,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-28 05:45:49,832 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:45:49,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:45:49,834 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 05:45:49,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-28 05:45:49,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-28 05:45:49,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:45:49,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-28 05:45:49,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:45:50,005 INFO L387 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 [2021-12-28 05:45:50,114 INFO L387 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 [2021-12-28 05:45:50,119 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:50,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:45:50,183 INFO L387 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 13 [2021-12-28 05:45:50,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-28 05:45:50,317 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:50,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401675474] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:45:50,318 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:45:50,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2021-12-28 05:45:50,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394851280] [2021-12-28 05:45:50,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:45:50,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-28 05:45:50,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:45:50,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-28 05:45:50,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-12-28 05:45:50,320 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:50,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:50,541 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2021-12-28 05:45:50,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 05:45:50,542 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-28 05:45:50,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:50,542 INFO L225 Difference]: With dead ends: 43 [2021-12-28 05:45:50,542 INFO L226 Difference]: Without dead ends: 33 [2021-12-28 05:45:50,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2021-12-28 05:45:50,543 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 54 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:50,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 94 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 171 Invalid, 0 Unknown, 18 Unchecked, 0.1s Time] [2021-12-28 05:45:50,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-28 05:45:50,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2021-12-28 05:45:50,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 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) [2021-12-28 05:45:50,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-12-28 05:45:50,546 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 25 [2021-12-28 05:45:50,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:50,546 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-12-28 05:45:50,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:50,546 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-12-28 05:45:50,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-28 05:45:50,547 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:50,547 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:50,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-28 05:45:50,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:45:50,759 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-28 05:45:50,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:50,760 INFO L85 PathProgramCache]: Analyzing trace with hash -413257756, now seen corresponding path program 4 times [2021-12-28 05:45:50,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:45:50,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159751330] [2021-12-28 05:45:50,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:50,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:45:50,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:50,902 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:50,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:45:50,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159751330] [2021-12-28 05:45:50,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159751330] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:45:50,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600179135] [2021-12-28 05:45:50,903 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-28 05:45:50,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:45:50,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:45:50,908 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 05:45:50,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-28 05:45:50,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-28 05:45:50,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:45:50,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-28 05:45:50,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:45:50,986 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 05:45:51,117 INFO L387 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 [2021-12-28 05:45:51,293 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:45:51,293 INFO L387 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 [2021-12-28 05:45:51,389 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:51,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:45:51,701 INFO L387 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 13 [2021-12-28 05:45:51,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-28 05:45:52,205 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:52,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600179135] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:45:52,206 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:45:52,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 32 [2021-12-28 05:45:52,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800749260] [2021-12-28 05:45:52,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:45:52,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-28 05:45:52,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:45:52,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-28 05:45:52,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=913, Unknown=0, NotChecked=0, Total=1056 [2021-12-28 05:45:52,208 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 33 states, 32 states have (on average 2.40625) internal successors, (77), 33 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) [2021-12-28 05:45:52,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:52,780 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2021-12-28 05:45:52,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-28 05:45:52,781 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.40625) internal successors, (77), 33 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) Word has length 29 [2021-12-28 05:45:52,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:52,781 INFO L225 Difference]: With dead ends: 38 [2021-12-28 05:45:52,781 INFO L226 Difference]: Without dead ends: 38 [2021-12-28 05:45:52,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=399, Invalid=1581, Unknown=0, NotChecked=0, Total=1980 [2021-12-28 05:45:52,783 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 93 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:52,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 121 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 335 Invalid, 0 Unknown, 8 Unchecked, 0.2s Time] [2021-12-28 05:45:52,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-28 05:45:52,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2021-12-28 05:45:52,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0571428571428572) 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) [2021-12-28 05:45:52,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-12-28 05:45:52,785 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 29 [2021-12-28 05:45:52,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:52,786 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-12-28 05:45:52,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.40625) internal successors, (77), 33 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) [2021-12-28 05:45:52,786 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-12-28 05:45:52,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-28 05:45:52,787 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:52,787 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:52,809 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-28 05:45:53,008 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 [2021-12-28 05:45:53,008 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-28 05:45:53,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:53,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1453066652, now seen corresponding path program 5 times [2021-12-28 05:45:53,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:45:53,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229464515] [2021-12-28 05:45:53,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:53,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:45:53,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:53,161 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:53,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:45:53,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229464515] [2021-12-28 05:45:53,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229464515] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:45:53,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869170104] [2021-12-28 05:45:53,161 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-28 05:45:53,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:45:53,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:45:53,163 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 05:45:53,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-28 05:45:53,220 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-28 05:45:53,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:45:53,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-28 05:45:53,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:45:53,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 05:45:53,521 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 35 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:53,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:45:53,736 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 31 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:53,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869170104] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:45:53,737 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:45:53,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2021-12-28 05:45:53,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380826974] [2021-12-28 05:45:53,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:45:53,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-28 05:45:53,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:45:53,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-28 05:45:53,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2021-12-28 05:45:53,741 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 29 states, 29 states have (on average 2.793103448275862) internal successors, (81), 29 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) [2021-12-28 05:45:53,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:53,941 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2021-12-28 05:45:53,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-28 05:45:53,941 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.793103448275862) internal successors, (81), 29 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 35 [2021-12-28 05:45:53,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:53,942 INFO L225 Difference]: With dead ends: 58 [2021-12-28 05:45:53,942 INFO L226 Difference]: Without dead ends: 43 [2021-12-28 05:45:53,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=274, Invalid=916, Unknown=0, NotChecked=0, Total=1190 [2021-12-28 05:45:53,943 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 31 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:53,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 99 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:45:53,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-28 05:45:53,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-12-28 05:45:53,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 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) [2021-12-28 05:45:53,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-12-28 05:45:53,945 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 35 [2021-12-28 05:45:53,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:53,946 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-12-28 05:45:53,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.793103448275862) internal successors, (81), 29 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) [2021-12-28 05:45:53,946 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-12-28 05:45:53,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-28 05:45:53,946 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:53,947 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:53,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-28 05:45:54,147 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 [2021-12-28 05:45:54,147 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-28 05:45:54,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:54,148 INFO L85 PathProgramCache]: Analyzing trace with hash -376934399, now seen corresponding path program 6 times [2021-12-28 05:45:54,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:45:54,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077609403] [2021-12-28 05:45:54,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:54,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:45:54,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:54,349 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:54,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:45:54,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077609403] [2021-12-28 05:45:54,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077609403] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:45:54,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312384585] [2021-12-28 05:45:54,350 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-28 05:45:54,350 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:45:54,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:45:54,353 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 05:45:54,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-28 05:45:54,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-28 05:45:54,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:45:54,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-28 05:45:54,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:45:54,548 INFO L387 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 [2021-12-28 05:45:55,092 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:45:55,092 INFO L387 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 [2021-12-28 05:45:55,206 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 15 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:55,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:45:55,693 INFO L387 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 13 [2021-12-28 05:45:55,697 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-28 05:45:55,701 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-28 05:45:55,760 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 15 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:55,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312384585] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:45:55,760 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:45:55,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 41 [2021-12-28 05:45:55,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46236823] [2021-12-28 05:45:55,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:45:55,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-28 05:45:55,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:45:55,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-28 05:45:55,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1496, Unknown=0, NotChecked=0, Total=1640 [2021-12-28 05:45:55,763 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 41 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:05,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:46:05,155 INFO L93 Difference]: Finished difference Result 68 states and 69 transitions. [2021-12-28 05:46:05,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-28 05:46:05,156 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 41 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-12-28 05:46:05,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:46:05,156 INFO L225 Difference]: With dead ends: 68 [2021-12-28 05:46:05,156 INFO L226 Difference]: Without dead ends: 52 [2021-12-28 05:46:05,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 57 SyntacticMatches, 10 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=365, Invalid=3174, Unknown=1, NotChecked=0, Total=3540 [2021-12-28 05:46:05,158 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 55 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 141 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:46:05,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 267 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 342 Invalid, 0 Unknown, 141 Unchecked, 0.1s Time] [2021-12-28 05:46:05,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-28 05:46:05,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2021-12-28 05:46:05,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 46 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:05,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2021-12-28 05:46:05,160 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 39 [2021-12-28 05:46:05,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:46:05,161 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2021-12-28 05:46:05,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 41 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:05,161 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2021-12-28 05:46:05,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-28 05:46:05,161 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:46:05,162 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:46:05,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-28 05:46:05,367 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 [2021-12-28 05:46:05,368 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-28 05:46:05,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:46:05,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1358190938, now seen corresponding path program 7 times [2021-12-28 05:46:05,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:46:05,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531452476] [2021-12-28 05:46:05,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:46:05,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:46:05,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:05,647 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 11 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:05,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:46:05,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531452476] [2021-12-28 05:46:05,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531452476] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:46:05,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605047652] [2021-12-28 05:46:05,648 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-28 05:46:05,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:46:05,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:46:05,652 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 05:46:05,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-28 05:46:05,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:05,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-28 05:46:05,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:46:05,883 INFO L387 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 [2021-12-28 05:46:06,013 INFO L387 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 [2021-12-28 05:46:06,018 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 11 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:06,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:46:06,103 INFO L387 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 13 [2021-12-28 05:46:06,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-28 05:46:06,262 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 11 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:06,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605047652] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:46:06,262 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:46:06,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 32 [2021-12-28 05:46:06,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427047719] [2021-12-28 05:46:06,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:46:06,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-28 05:46:06,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:46:06,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-28 05:46:06,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=901, Unknown=0, NotChecked=0, Total=992 [2021-12-28 05:46:06,264 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 32 states, 32 states have (on average 2.59375) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:06,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:46:06,774 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2021-12-28 05:46:06,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-28 05:46:06,774 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-12-28 05:46:06,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:46:06,775 INFO L225 Difference]: With dead ends: 73 [2021-12-28 05:46:06,775 INFO L226 Difference]: Without dead ends: 54 [2021-12-28 05:46:06,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 74 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=243, Invalid=1827, Unknown=0, NotChecked=0, Total=2070 [2021-12-28 05:46:06,777 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 83 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 05:46:06,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 289 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 05:46:06,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-12-28 05:46:06,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2021-12-28 05:46:06,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.04) internal successors, (52), 50 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:06,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2021-12-28 05:46:06,780 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 46 [2021-12-28 05:46:06,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:46:06,780 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2021-12-28 05:46:06,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:06,780 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2021-12-28 05:46:06,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-28 05:46:06,781 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:46:06,781 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:46:06,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-28 05:46:06,999 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,SelfDestructingSolverStorable16 [2021-12-28 05:46:07,000 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-28 05:46:07,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:46:07,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1602484457, now seen corresponding path program 8 times [2021-12-28 05:46:07,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:46:07,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256063199] [2021-12-28 05:46:07,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:46:07,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:46:07,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:07,261 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 28 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:07,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:46:07,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256063199] [2021-12-28 05:46:07,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256063199] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:46:07,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761965729] [2021-12-28 05:46:07,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 05:46:07,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:46:07,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:46:07,263 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 05:46:07,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-28 05:46:07,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 05:46:07,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:46:07,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-28 05:46:07,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:46:07,631 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 45 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:07,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:46:07,873 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-28 05:46:07,929 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 45 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:07,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761965729] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:46:07,929 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:46:07,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 35 [2021-12-28 05:46:07,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10263954] [2021-12-28 05:46:07,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:46:07,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-28 05:46:07,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:46:07,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-28 05:46:07,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1095, Unknown=0, NotChecked=0, Total=1260 [2021-12-28 05:46:07,932 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 36 states, 35 states have (on average 2.914285714285714) internal successors, (102), 36 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:08,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:46:08,275 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2021-12-28 05:46:08,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-28 05:46:08,275 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.914285714285714) internal successors, (102), 36 states have internal predecessors, (102), 0 states have call successors, (0), 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 50 [2021-12-28 05:46:08,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:46:08,276 INFO L225 Difference]: With dead ends: 56 [2021-12-28 05:46:08,276 INFO L226 Difference]: Without dead ends: 56 [2021-12-28 05:46:08,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=381, Invalid=1599, Unknown=0, NotChecked=0, Total=1980 [2021-12-28 05:46:08,277 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 130 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 05:46:08,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 217 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 05:46:08,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-12-28 05:46:08,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2021-12-28 05:46:08,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 53 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:08,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2021-12-28 05:46:08,280 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 50 [2021-12-28 05:46:08,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:46:08,280 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2021-12-28 05:46:08,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.914285714285714) internal successors, (102), 36 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:08,281 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2021-12-28 05:46:08,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-28 05:46:08,281 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:46:08,281 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:46:08,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-28 05:46:08,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-28 05:46:08,504 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-28 05:46:08,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:46:08,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1052944635, now seen corresponding path program 9 times [2021-12-28 05:46:08,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:46:08,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567447117] [2021-12-28 05:46:08,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:46:08,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:46:08,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:08,796 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 13 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:08,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:46:08,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567447117] [2021-12-28 05:46:08,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567447117] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:46:08,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921555138] [2021-12-28 05:46:08,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-28 05:46:08,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:46:08,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:46:08,799 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 05:46:08,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-28 05:46:08,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-28 05:46:08,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:46:08,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-28 05:46:08,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:46:09,074 INFO L387 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 [2021-12-28 05:46:09,236 INFO L387 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 [2021-12-28 05:46:09,241 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 13 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:09,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:46:09,343 INFO L387 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 13 [2021-12-28 05:46:09,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-28 05:46:09,536 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 13 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:09,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921555138] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:46:09,536 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:46:09,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 35 [2021-12-28 05:46:09,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932560338] [2021-12-28 05:46:09,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:46:09,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-28 05:46:09,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:46:09,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-28 05:46:09,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2021-12-28 05:46:09,538 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 35 states, 35 states have (on average 2.6857142857142855) internal successors, (94), 35 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:10,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:46:10,238 INFO L93 Difference]: Finished difference Result 83 states and 84 transitions. [2021-12-28 05:46:10,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-28 05:46:10,239 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.6857142857142855) internal successors, (94), 35 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-12-28 05:46:10,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:46:10,239 INFO L225 Difference]: With dead ends: 83 [2021-12-28 05:46:10,239 INFO L226 Difference]: Without dead ends: 61 [2021-12-28 05:46:10,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 85 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=269, Invalid=2281, Unknown=0, NotChecked=0, Total=2550 [2021-12-28 05:46:10,240 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 116 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 05:46:10,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 385 Invalid, 948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 903 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 05:46:10,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-12-28 05:46:10,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2021-12-28 05:46:10,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 57 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:10,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2021-12-28 05:46:10,243 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 53 [2021-12-28 05:46:10,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:46:10,243 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2021-12-28 05:46:10,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.6857142857142855) internal successors, (94), 35 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:10,243 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2021-12-28 05:46:10,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-28 05:46:10,244 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:46:10,244 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:46:10,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-28 05:46:10,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:46:10,445 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-28 05:46:10,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:46:10,445 INFO L85 PathProgramCache]: Analyzing trace with hash -409414312, now seen corresponding path program 10 times [2021-12-28 05:46:10,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:46:10,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673300469] [2021-12-28 05:46:10,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:46:10,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:46:10,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:10,671 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 45 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:10,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:46:10,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673300469] [2021-12-28 05:46:10,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673300469] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:46:10,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810488034] [2021-12-28 05:46:10,671 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-28 05:46:10,671 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:46:10,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:46:10,672 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) [2021-12-28 05:46:10,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-28 05:46:10,746 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-28 05:46:10,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:46:10,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-28 05:46:10,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:46:10,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 05:46:11,126 INFO L387 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 [2021-12-28 05:46:11,518 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:46:11,518 INFO L387 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 [2021-12-28 05:46:11,636 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 72 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:11,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:46:12,263 INFO L387 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 13 [2021-12-28 05:46:12,266 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-28 05:46:13,292 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 91 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:13,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810488034] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:46:13,292 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:46:13,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21, 21] total 57 [2021-12-28 05:46:13,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643094196] [2021-12-28 05:46:13,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:46:13,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-12-28 05:46:13,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:46:13,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-12-28 05:46:13,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=2948, Unknown=0, NotChecked=0, Total=3306 [2021-12-28 05:46:13,296 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 58 states, 57 states have (on average 2.8947368421052633) internal successors, (165), 58 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:14,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:46:14,314 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2021-12-28 05:46:14,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-28 05:46:14,315 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 2.8947368421052633) internal successors, (165), 58 states have internal predecessors, (165), 0 states have call successors, (0), 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 57 [2021-12-28 05:46:14,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:46:14,315 INFO L225 Difference]: With dead ends: 66 [2021-12-28 05:46:14,315 INFO L226 Difference]: Without dead ends: 66 [2021-12-28 05:46:14,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=950, Invalid=4600, Unknown=0, NotChecked=0, Total=5550 [2021-12-28 05:46:14,317 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 244 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 05:46:14,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 282 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 725 Invalid, 0 Unknown, 10 Unchecked, 0.3s Time] [2021-12-28 05:46:14,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-28 05:46:14,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2021-12-28 05:46:14,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:14,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2021-12-28 05:46:14,320 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 57 [2021-12-28 05:46:14,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:46:14,320 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2021-12-28 05:46:14,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 2.8947368421052633) internal successors, (165), 58 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:14,320 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2021-12-28 05:46:14,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-28 05:46:14,321 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:46:14,321 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:46:14,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-28 05:46:14,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:46:14,527 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-28 05:46:14,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:46:14,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1923200216, now seen corresponding path program 11 times [2021-12-28 05:46:14,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:46:14,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625023580] [2021-12-28 05:46:14,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:46:14,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:46:14,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:14,775 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 95 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:14,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:46:14,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625023580] [2021-12-28 05:46:14,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625023580] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:46:14,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601058501] [2021-12-28 05:46:14,776 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-28 05:46:14,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:46:14,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:46:14,778 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) [2021-12-28 05:46:14,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-28 05:46:14,862 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-12-28 05:46:14,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:46:14,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-28 05:46:14,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:46:14,887 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 05:46:15,491 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 117 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:15,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:46:15,940 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 117 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:15,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601058501] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:46:15,940 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:46:15,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 49 [2021-12-28 05:46:15,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554843744] [2021-12-28 05:46:15,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:46:15,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-28 05:46:15,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:46:15,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-28 05:46:15,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=1908, Unknown=0, NotChecked=0, Total=2352 [2021-12-28 05:46:15,942 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 49 states, 49 states have (on average 3.163265306122449) internal successors, (155), 49 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:16,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:46:16,244 INFO L93 Difference]: Finished difference Result 98 states and 99 transitions. [2021-12-28 05:46:16,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-28 05:46:16,245 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.163265306122449) internal successors, (155), 49 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-12-28 05:46:16,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:46:16,245 INFO L225 Difference]: With dead ends: 98 [2021-12-28 05:46:16,245 INFO L226 Difference]: Without dead ends: 71 [2021-12-28 05:46:16,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=732, Invalid=2690, Unknown=0, NotChecked=0, Total=3422 [2021-12-28 05:46:16,246 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 57 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:46:16,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 111 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:46:16,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-12-28 05:46:16,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2021-12-28 05:46:16,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:16,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2021-12-28 05:46:16,249 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 63 [2021-12-28 05:46:16,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:46:16,249 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2021-12-28 05:46:16,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.163265306122449) internal successors, (155), 49 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:16,250 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2021-12-28 05:46:16,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-28 05:46:16,250 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:46:16,251 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:46:16,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-28 05:46:16,455 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,SelfDestructingSolverStorable20 [2021-12-28 05:46:16,455 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-28 05:46:16,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:46:16,456 INFO L85 PathProgramCache]: Analyzing trace with hash -305803019, now seen corresponding path program 12 times [2021-12-28 05:46:16,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:46:16,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471544907] [2021-12-28 05:46:16,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:46:16,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:46:16,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:16,817 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 17 proven. 220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:16,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:46:16,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471544907] [2021-12-28 05:46:16,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471544907] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:46:16,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034944566] [2021-12-28 05:46:16,818 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-28 05:46:16,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:46:16,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:46:16,819 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) [2021-12-28 05:46:16,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-28 05:46:16,932 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-12-28 05:46:16,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:46:16,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 72 conjunts are in the unsatisfiable core [2021-12-28 05:46:16,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:46:17,219 INFO L387 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 [2021-12-28 05:46:17,378 INFO L387 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 [2021-12-28 05:46:17,384 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 17 proven. 220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:17,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:46:17,482 INFO L387 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 13 [2021-12-28 05:46:17,484 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-28 05:46:17,758 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 17 proven. 220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:17,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034944566] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:46:17,758 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:46:17,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 41 [2021-12-28 05:46:17,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184020639] [2021-12-28 05:46:17,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:46:17,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-28 05:46:17,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:46:17,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-28 05:46:17,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1528, Unknown=0, NotChecked=0, Total=1640 [2021-12-28 05:46:17,760 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 41 states, 41 states have (on average 2.8292682926829267) internal successors, (116), 41 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:18,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:46:18,739 INFO L93 Difference]: Finished difference Result 103 states and 104 transitions. [2021-12-28 05:46:18,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-28 05:46:18,739 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.8292682926829267) internal successors, (116), 41 states have internal predecessors, (116), 0 states have call successors, (0), 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 67 [2021-12-28 05:46:18,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:46:18,740 INFO L225 Difference]: With dead ends: 103 [2021-12-28 05:46:18,740 INFO L226 Difference]: Without dead ends: 75 [2021-12-28 05:46:18,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 110 SyntacticMatches, 7 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=321, Invalid=3339, Unknown=0, NotChecked=0, Total=3660 [2021-12-28 05:46:18,742 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 153 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 1139 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 1199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-28 05:46:18,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 475 Invalid, 1199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1139 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-28 05:46:18,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-28 05:46:18,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2021-12-28 05:46:18,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.028169014084507) internal successors, (73), 71 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) [2021-12-28 05:46:18,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2021-12-28 05:46:18,744 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 67 [2021-12-28 05:46:18,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:46:18,744 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2021-12-28 05:46:18,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.8292682926829267) internal successors, (116), 41 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:18,745 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2021-12-28 05:46:18,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-28 05:46:18,745 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:46:18,746 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:46:18,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-28 05:46:18,951 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,SelfDestructingSolverStorable21 [2021-12-28 05:46:18,951 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-28 05:46:18,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:46:18,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1022060910, now seen corresponding path program 13 times [2021-12-28 05:46:18,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:46:18,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760052027] [2021-12-28 05:46:18,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:46:18,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:46:18,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:19,292 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 91 proven. 179 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:19,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:46:19,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760052027] [2021-12-28 05:46:19,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760052027] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:46:19,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55408169] [2021-12-28 05:46:19,293 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-28 05:46:19,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:46:19,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:46:19,294 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) [2021-12-28 05:46:19,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-28 05:46:19,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:19,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-28 05:46:19,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:46:19,752 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 120 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:19,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:46:20,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-28 05:46:20,238 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 120 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:20,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55408169] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:46:20,238 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:46:20,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23, 23] total 46 [2021-12-28 05:46:20,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663799] [2021-12-28 05:46:20,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:46:20,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-28 05:46:20,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:46:20,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-28 05:46:20,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1930, Unknown=0, NotChecked=0, Total=2162 [2021-12-28 05:46:20,241 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 47 states, 46 states have (on average 3.130434782608696) internal successors, (144), 47 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:21,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:46:21,079 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2021-12-28 05:46:21,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-28 05:46:21,079 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 3.130434782608696) internal successors, (144), 47 states have internal predecessors, (144), 0 states have call successors, (0), 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 71 [2021-12-28 05:46:21,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:46:21,080 INFO L225 Difference]: With dead ends: 77 [2021-12-28 05:46:21,080 INFO L226 Difference]: Without dead ends: 77 [2021-12-28 05:46:21,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 114 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=818, Invalid=3604, Unknown=0, NotChecked=0, Total=4422 [2021-12-28 05:46:21,085 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 238 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 1014 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 1119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 05:46:21,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 409 Invalid, 1119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1014 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 05:46:21,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-12-28 05:46:21,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2021-12-28 05:46:21,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.027027027027027) internal successors, (76), 74 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:21,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2021-12-28 05:46:21,087 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 71 [2021-12-28 05:46:21,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:46:21,087 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2021-12-28 05:46:21,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 3.130434782608696) internal successors, (144), 47 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:21,088 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2021-12-28 05:46:21,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-28 05:46:21,089 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:46:21,089 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:46:21,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-28 05:46:21,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:46:21,295 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-28 05:46:21,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:46:21,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1193427278, now seen corresponding path program 14 times [2021-12-28 05:46:21,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:46:21,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026611213] [2021-12-28 05:46:21,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:46:21,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:46:21,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:21,727 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 19 proven. 279 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:21,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:46:21,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026611213] [2021-12-28 05:46:21,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026611213] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:46:21,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495622106] [2021-12-28 05:46:21,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 05:46:21,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:46:21,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:46:21,729 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) [2021-12-28 05:46:21,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-28 05:46:21,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 05:46:21,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:46:21,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 71 conjunts are in the unsatisfiable core [2021-12-28 05:46:21,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:46:22,068 INFO L387 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 [2021-12-28 05:46:23,220 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:46:23,220 INFO L387 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 [2021-12-28 05:46:23,397 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 120 proven. 178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:23,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:46:24,284 INFO L387 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 13 [2021-12-28 05:46:24,287 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-28 05:46:24,290 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-28 05:46:24,368 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 120 proven. 178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:24,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495622106] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:46:24,368 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:46:24,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 66 [2021-12-28 05:46:24,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368030356] [2021-12-28 05:46:24,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:46:24,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-12-28 05:46:24,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:46:24,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-12-28 05:46:24,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=3965, Unknown=0, NotChecked=0, Total=4290 [2021-12-28 05:46:24,370 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 66 states, 66 states have (on average 2.696969696969697) internal successors, (178), 66 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) [2021-12-28 05:46:25,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:46:25,443 INFO L93 Difference]: Finished difference Result 118 states and 119 transitions. [2021-12-28 05:46:25,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-28 05:46:25,443 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.696969696969697) internal successors, (178), 66 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 74 [2021-12-28 05:46:25,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:46:25,444 INFO L225 Difference]: With dead ends: 118 [2021-12-28 05:46:25,444 INFO L226 Difference]: Without dead ends: 87 [2021-12-28 05:46:25,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 123 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1117 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=551, Invalid=6255, Unknown=0, NotChecked=0, Total=6806 [2021-12-28 05:46:25,446 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 91 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 983 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 1130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 05:46:25,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 670 Invalid, 1130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 983 Invalid, 0 Unknown, 132 Unchecked, 0.4s Time] [2021-12-28 05:46:25,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-12-28 05:46:25,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 82. [2021-12-28 05:46:25,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 81 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:25,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2021-12-28 05:46:25,449 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 74 [2021-12-28 05:46:25,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:46:25,453 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2021-12-28 05:46:25,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.696969696969697) internal successors, (178), 66 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) [2021-12-28 05:46:25,454 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2021-12-28 05:46:25,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-28 05:46:25,454 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:46:25,454 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:46:25,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-28 05:46:25,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:46:25,678 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-28 05:46:25,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:46:25,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1850755055, now seen corresponding path program 15 times [2021-12-28 05:46:25,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:46:25,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513389118] [2021-12-28 05:46:25,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:46:25,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:46:25,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:26,119 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 21 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:26,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:46:26,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513389118] [2021-12-28 05:46:26,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513389118] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:46:26,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638824597] [2021-12-28 05:46:26,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-28 05:46:26,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:46:26,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:46:26,121 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) [2021-12-28 05:46:26,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-28 05:46:26,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-12-28 05:46:26,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:46:26,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 84 conjunts are in the unsatisfiable core [2021-12-28 05:46:26,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:46:26,624 INFO L387 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 [2021-12-28 05:46:26,804 INFO L387 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 [2021-12-28 05:46:26,808 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 21 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:26,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:46:26,932 INFO L387 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 13 [2021-12-28 05:46:26,934 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-28 05:46:27,171 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 21 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:27,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638824597] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:46:27,171 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:46:27,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 47 [2021-12-28 05:46:27,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697457149] [2021-12-28 05:46:27,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:46:27,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-28 05:46:27,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:46:27,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-28 05:46:27,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=2036, Unknown=0, NotChecked=0, Total=2162 [2021-12-28 05:46:27,173 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand has 47 states, 47 states have (on average 2.9361702127659575) internal successors, (138), 47 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) [2021-12-28 05:46:28,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:46:28,392 INFO L93 Difference]: Finished difference Result 123 states and 124 transitions. [2021-12-28 05:46:28,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-28 05:46:28,393 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.9361702127659575) internal successors, (138), 47 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) Word has length 81 [2021-12-28 05:46:28,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:46:28,394 INFO L225 Difference]: With dead ends: 123 [2021-12-28 05:46:28,394 INFO L226 Difference]: Without dead ends: 89 [2021-12-28 05:46:28,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 138 SyntacticMatches, 5 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=373, Invalid=4597, Unknown=0, NotChecked=0, Total=4970 [2021-12-28 05:46:28,395 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 195 mSDsluCounter, 686 mSDsCounter, 0 mSdLazyCounter, 1729 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 1812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-28 05:46:28,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 711 Invalid, 1812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1729 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-28 05:46:28,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-28 05:46:28,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2021-12-28 05:46:28,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 85 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:28,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2021-12-28 05:46:28,397 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 81 [2021-12-28 05:46:28,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:46:28,397 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2021-12-28 05:46:28,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.9361702127659575) internal successors, (138), 47 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) [2021-12-28 05:46:28,398 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2021-12-28 05:46:28,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-28 05:46:28,398 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:46:28,398 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:46:28,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-28 05:46:28,599 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,SelfDestructingSolverStorable24 [2021-12-28 05:46:28,600 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-28 05:46:28,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:46:28,600 INFO L85 PathProgramCache]: Analyzing trace with hash -680364340, now seen corresponding path program 16 times [2021-12-28 05:46:28,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:46:28,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381870010] [2021-12-28 05:46:28,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:46:28,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:46:28,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:29,052 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 153 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:29,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:46:29,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381870010] [2021-12-28 05:46:29,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381870010] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:46:29,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061957046] [2021-12-28 05:46:29,053 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-28 05:46:29,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:46:29,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:46:29,056 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) [2021-12-28 05:46:29,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-28 05:46:29,163 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-28 05:46:29,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:46:29,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 83 conjunts are in the unsatisfiable core [2021-12-28 05:46:29,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:46:29,180 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 05:46:29,735 INFO L387 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 [2021-12-28 05:46:30,488 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:46:30,488 INFO L387 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 [2021-12-28 05:46:30,631 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 200 proven. 207 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:30,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:46:31,579 INFO L387 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 13 [2021-12-28 05:46:31,582 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-28 05:46:33,196 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 231 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:33,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061957046] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:46:33,196 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:46:33,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 29, 29] total 81 [2021-12-28 05:46:33,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313713760] [2021-12-28 05:46:33,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:46:33,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-12-28 05:46:33,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:46:33,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-12-28 05:46:33,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=688, Invalid=5954, Unknown=0, NotChecked=0, Total=6642 [2021-12-28 05:46:33,198 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand has 82 states, 81 states have (on average 3.074074074074074) internal successors, (249), 82 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:34,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:46:34,799 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2021-12-28 05:46:34,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-28 05:46:34,799 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 81 states have (on average 3.074074074074074) internal successors, (249), 82 states have internal predecessors, (249), 0 states have call successors, (0), 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 [2021-12-28 05:46:34,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:46:34,800 INFO L225 Difference]: With dead ends: 94 [2021-12-28 05:46:34,800 INFO L226 Difference]: Without dead ends: 94 [2021-12-28 05:46:34,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1718 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1680, Invalid=8826, Unknown=0, NotChecked=0, Total=10506 [2021-12-28 05:46:34,802 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 433 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 1434 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 1649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 1434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-28 05:46:34,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [433 Valid, 562 Invalid, 1649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 1434 Invalid, 0 Unknown, 22 Unchecked, 0.6s Time] [2021-12-28 05:46:34,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-12-28 05:46:34,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2021-12-28 05:46:34,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.021978021978022) internal successors, (93), 91 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:34,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2021-12-28 05:46:34,804 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 85 [2021-12-28 05:46:34,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:46:34,805 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2021-12-28 05:46:34,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 81 states have (on average 3.074074074074074) internal successors, (249), 82 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:34,805 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2021-12-28 05:46:34,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-28 05:46:34,806 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:46:34,806 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:46:34,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-28 05:46:35,011 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,SelfDestructingSolverStorable25 [2021-12-28 05:46:35,011 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-28 05:46:35,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:46:35,012 INFO L85 PathProgramCache]: Analyzing trace with hash 525430604, now seen corresponding path program 17 times [2021-12-28 05:46:35,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:46:35,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072517260] [2021-12-28 05:46:35,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:46:35,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:46:35,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:35,428 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 213 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:35,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:46:35,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072517260] [2021-12-28 05:46:35,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072517260] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:46:35,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091941369] [2021-12-28 05:46:35,428 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-28 05:46:35,428 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:46:35,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:46:35,432 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) [2021-12-28 05:46:35,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-28 05:46:35,587 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-12-28 05:46:35,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:46:35,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-28 05:46:35,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:46:35,604 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 05:46:36,696 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 247 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:36,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:46:37,436 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 247 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:37,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091941369] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:46:37,437 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:46:37,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 68 [2021-12-28 05:46:37,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461597596] [2021-12-28 05:46:37,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:46:37,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-12-28 05:46:37,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:46:37,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-12-28 05:46:37,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=787, Invalid=3769, Unknown=0, NotChecked=0, Total=4556 [2021-12-28 05:46:37,439 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand has 68 states, 68 states have (on average 3.338235294117647) internal successors, (227), 68 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:38,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:46:38,311 INFO L93 Difference]: Finished difference Result 138 states and 139 transitions. [2021-12-28 05:46:38,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-28 05:46:38,312 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.338235294117647) internal successors, (227), 68 states have internal predecessors, (227), 0 states have call successors, (0), 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 91 [2021-12-28 05:46:38,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:46:38,312 INFO L225 Difference]: With dead ends: 138 [2021-12-28 05:46:38,313 INFO L226 Difference]: Without dead ends: 99 [2021-12-28 05:46:38,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2132 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1615, Invalid=6941, Unknown=0, NotChecked=0, Total=8556 [2021-12-28 05:46:38,314 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 105 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 05:46:38,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 220 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 05:46:38,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-12-28 05:46:38,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2021-12-28 05:46:38,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0210526315789474) internal successors, (97), 95 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:38,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2021-12-28 05:46:38,316 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 91 [2021-12-28 05:46:38,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:46:38,317 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2021-12-28 05:46:38,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.338235294117647) internal successors, (227), 68 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:38,317 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2021-12-28 05:46:38,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-28 05:46:38,318 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:46:38,318 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:46:38,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-28 05:46:38,527 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,SelfDestructingSolverStorable26 [2021-12-28 05:46:38,527 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-28 05:46:38,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:46:38,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1484755479, now seen corresponding path program 18 times [2021-12-28 05:46:38,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:46:38,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254061580] [2021-12-28 05:46:38,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:46:38,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:46:38,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:39,163 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 25 proven. 498 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:39,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:46:39,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254061580] [2021-12-28 05:46:39,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254061580] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:46:39,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856439080] [2021-12-28 05:46:39,164 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-28 05:46:39,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:46:39,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:46:39,165 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) [2021-12-28 05:46:39,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-28 05:46:39,377 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-12-28 05:46:39,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:46:39,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 96 conjunts are in the unsatisfiable core [2021-12-28 05:46:39,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:46:39,847 INFO L387 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 [2021-12-28 05:46:40,037 INFO L387 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 [2021-12-28 05:46:40,043 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 25 proven. 498 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:40,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:46:40,176 INFO L387 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 13 [2021-12-28 05:46:40,179 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-28 05:46:40,552 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 25 proven. 498 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:40,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856439080] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:46:40,552 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:46:40,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 53 [2021-12-28 05:46:40,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390628332] [2021-12-28 05:46:40,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:46:40,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-28 05:46:40,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:46:40,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-28 05:46:40,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2616, Unknown=0, NotChecked=0, Total=2756 [2021-12-28 05:46:40,554 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand has 53 states, 53 states have (on average 3.018867924528302) internal successors, (160), 53 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:42,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:46:42,222 INFO L93 Difference]: Finished difference Result 143 states and 144 transitions. [2021-12-28 05:46:42,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-28 05:46:42,222 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.018867924528302) internal successors, (160), 53 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-12-28 05:46:42,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:46:42,223 INFO L225 Difference]: With dead ends: 143 [2021-12-28 05:46:42,223 INFO L226 Difference]: Without dead ends: 103 [2021-12-28 05:46:42,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 160 SyntacticMatches, 9 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 836 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=425, Invalid=6055, Unknown=0, NotChecked=0, Total=6480 [2021-12-28 05:46:42,224 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 200 mSDsluCounter, 1011 mSDsCounter, 0 mSdLazyCounter, 2542 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 1040 SdHoareTripleChecker+Invalid, 2629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 2542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-28 05:46:42,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 1040 Invalid, 2629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 2542 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-28 05:46:42,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-12-28 05:46:42,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 100. [2021-12-28 05:46:42,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.02020202020202) internal successors, (101), 99 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) [2021-12-28 05:46:42,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2021-12-28 05:46:42,227 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 95 [2021-12-28 05:46:42,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:46:42,227 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2021-12-28 05:46:42,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.018867924528302) internal successors, (160), 53 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:42,227 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2021-12-28 05:46:42,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-28 05:46:42,228 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:46:42,228 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:46:42,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-28 05:46:42,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:46:42,443 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-28 05:46:42,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:46:42,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1822742022, now seen corresponding path program 19 times [2021-12-28 05:46:42,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:46:42,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437949747] [2021-12-28 05:46:42,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:46:42,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:46:42,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:42,990 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 231 proven. 341 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:42,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:46:42,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437949747] [2021-12-28 05:46:42,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437949747] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:46:42,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882043539] [2021-12-28 05:46:42,990 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-28 05:46:42,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:46:42,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:46:42,992 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) [2021-12-28 05:46:42,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-28 05:46:43,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:43,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 80 conjunts are in the unsatisfiable core [2021-12-28 05:46:43,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:46:43,756 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 276 proven. 296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:43,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:46:44,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-28 05:46:44,516 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 276 proven. 296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:44,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882043539] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:46:44,516 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:46:44,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 31, 31] total 62 [2021-12-28 05:46:44,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406451915] [2021-12-28 05:46:44,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:46:44,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-12-28 05:46:44,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:46:44,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-12-28 05:46:44,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=398, Invalid=3508, Unknown=0, NotChecked=0, Total=3906 [2021-12-28 05:46:44,523 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand has 63 states, 62 states have (on average 3.225806451612903) internal successors, (200), 63 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:45,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:46:45,887 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2021-12-28 05:46:45,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-28 05:46:45,888 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 3.225806451612903) internal successors, (200), 63 states have internal predecessors, (200), 0 states have call successors, (0), 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 99 [2021-12-28 05:46:45,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:46:45,888 INFO L225 Difference]: With dead ends: 105 [2021-12-28 05:46:45,888 INFO L226 Difference]: Without dead ends: 105 [2021-12-28 05:46:45,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 162 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1284 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1496, Invalid=6694, Unknown=0, NotChecked=0, Total=8190 [2021-12-28 05:46:45,889 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 446 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 1675 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 1878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 1675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-28 05:46:45,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [446 Valid, 664 Invalid, 1878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 1675 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-28 05:46:45,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-12-28 05:46:45,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2021-12-28 05:46:45,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.0196078431372548) internal successors, (104), 102 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:45,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2021-12-28 05:46:45,892 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 99 [2021-12-28 05:46:45,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:46:45,892 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2021-12-28 05:46:45,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 3.225806451612903) internal successors, (200), 63 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:45,892 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2021-12-28 05:46:45,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-28 05:46:45,893 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:46:45,893 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:46:45,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0