./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d450427152972d80716d02c80706dd3b248a3fc7c05c71ffd29d66e32e1e82f2 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 05:47:57,589 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 05:47:57,590 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 05:47:57,608 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 05:47:57,609 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 05:47:57,609 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 05:47:57,610 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 05:47:57,612 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 05:47:57,614 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 05:47:57,618 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 05:47:57,619 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 05:47:57,620 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 05:47:57,621 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 05:47:57,623 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 05:47:57,625 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 05:47:57,626 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 05:47:57,627 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 05:47:57,628 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 05:47:57,632 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 05:47:57,636 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 05:47:57,637 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 05:47:57,638 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 05:47:57,639 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 05:47:57,640 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 05:47:57,646 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 05:47:57,646 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 05:47:57,646 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 05:47:57,647 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 05:47:57,648 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 05:47:57,648 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 05:47:57,649 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 05:47:57,649 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 05:47:57,650 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 05:47:57,651 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 05:47:57,652 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 05:47:57,652 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 05:47:57,652 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 05:47:57,652 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 05:47:57,653 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 05:47:57,653 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 05:47:57,654 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 05:47:57,655 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-16 05:47:57,682 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 05:47:57,683 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 05:47:57,683 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 05:47:57,683 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 05:47:57,684 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 05:47:57,684 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 05:47:57,685 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 05:47:57,685 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 05:47:57,685 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 05:47:57,685 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 05:47:57,686 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 05:47:57,686 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-16 05:47:57,686 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 05:47:57,686 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 05:47:57,686 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 05:47:57,686 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-16 05:47:57,687 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-16 05:47:57,687 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-16 05:47:57,687 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 05:47:57,687 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-16 05:47:57,687 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 05:47:57,687 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 05:47:57,687 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 05:47:57,687 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 05:47:57,688 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 05:47:57,688 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 05:47:57,688 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 05:47:57,688 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 05:47:57,688 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 05:47:57,688 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 05:47:57,688 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 05:47:57,689 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d450427152972d80716d02c80706dd3b248a3fc7c05c71ffd29d66e32e1e82f2 [2021-12-16 05:47:57,891 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 05:47:57,909 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 05:47:57,910 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 05:47:57,912 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 05:47:57,913 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 05:47:57,914 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i [2021-12-16 05:47:57,961 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1fc89ce2/3e7e740bc6e6496bbb96b785fb3b08a3/FLAG78c084853 [2021-12-16 05:47:58,378 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 05:47:58,378 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i [2021-12-16 05:47:58,390 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1fc89ce2/3e7e740bc6e6496bbb96b785fb3b08a3/FLAG78c084853 [2021-12-16 05:47:58,400 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1fc89ce2/3e7e740bc6e6496bbb96b785fb3b08a3 [2021-12-16 05:47:58,402 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 05:47:58,403 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 05:47:58,404 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 05:47:58,404 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 05:47:58,406 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 05:47:58,407 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 05:47:58" (1/1) ... [2021-12-16 05:47:58,408 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9660ed3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:47:58, skipping insertion in model container [2021-12-16 05:47:58,408 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 05:47:58" (1/1) ... [2021-12-16 05:47:58,412 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 05:47:58,435 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 05:47:58,626 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 05:47:58,630 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 05:47:58,670 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 05:47:58,689 INFO L208 MainTranslator]: Completed translation [2021-12-16 05:47:58,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:47:58 WrapperNode [2021-12-16 05:47:58,690 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 05:47:58,691 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 05:47:58,691 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 05:47:58,691 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 05:47:58,699 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:47:58" (1/1) ... [2021-12-16 05:47:58,712 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:47:58" (1/1) ... [2021-12-16 05:47:58,733 INFO L137 Inliner]: procedures = 117, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 90 [2021-12-16 05:47:58,734 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 05:47:58,735 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 05:47:58,735 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 05:47:58,735 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 05:47:58,740 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:47:58" (1/1) ... [2021-12-16 05:47:58,740 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:47:58" (1/1) ... [2021-12-16 05:47:58,742 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:47:58" (1/1) ... [2021-12-16 05:47:58,742 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:47:58" (1/1) ... [2021-12-16 05:47:58,746 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:47:58" (1/1) ... [2021-12-16 05:47:58,749 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:47:58" (1/1) ... [2021-12-16 05:47:58,750 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:47:58" (1/1) ... [2021-12-16 05:47:58,754 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 05:47:58,786 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 05:47:58,786 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 05:47:58,786 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 05:47:58,787 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:47:58" (1/1) ... [2021-12-16 05:47:58,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 05:47:58,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:47:58,816 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) [2021-12-16 05:47:58,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-16 05:47:58,859 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 05:47:58,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 05:47:58,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 05:47:58,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 05:47:58,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 05:47:58,860 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 05:47:58,923 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 05:47:58,924 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 05:47:59,076 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 05:47:59,080 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 05:47:59,080 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-16 05:47:59,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 05:47:59 BoogieIcfgContainer [2021-12-16 05:47:59,082 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 05:47:59,083 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 05:47:59,083 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 05:47:59,085 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 05:47:59,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 05:47:58" (1/3) ... [2021-12-16 05:47:59,086 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@343f8035 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 05:47:59, skipping insertion in model container [2021-12-16 05:47:59,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:47:58" (2/3) ... [2021-12-16 05:47:59,086 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@343f8035 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 05:47:59, skipping insertion in model container [2021-12-16 05:47:59,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 05:47:59" (3/3) ... [2021-12-16 05:47:59,087 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrpbrk-alloca-2.i [2021-12-16 05:47:59,090 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 05:47:59,091 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2021-12-16 05:47:59,133 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 05:47:59,137 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-16 05:47:59,138 INFO L340 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2021-12-16 05:47:59,147 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 30 states have (on average 1.8) internal successors, (54), 43 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:47:59,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-16 05:47:59,151 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:47:59,152 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:47:59,152 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:47:59,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:47:59,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2021-12-16 05:47:59,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:47:59,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046121957] [2021-12-16 05:47:59,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:47:59,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:47:59,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:47:59,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:47:59,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:47:59,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046121957] [2021-12-16 05:47:59,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046121957] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:47:59,359 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:47:59,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 05:47:59,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262821167] [2021-12-16 05:47:59,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:47:59,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 05:47:59,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:47:59,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 05:47:59,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:47:59,391 INFO L87 Difference]: Start difference. First operand has 44 states, 30 states have (on average 1.8) internal successors, (54), 43 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:47:59,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:47:59,434 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2021-12-16 05:47:59,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 05:47:59,436 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-16 05:47:59,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:47:59,440 INFO L225 Difference]: With dead ends: 42 [2021-12-16 05:47:59,441 INFO L226 Difference]: Without dead ends: 40 [2021-12-16 05:47:59,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:47:59,448 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 36 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:47:59,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 39 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:47:59,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-16 05:47:59,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-12-16 05:47:59,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 39 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:47:59,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2021-12-16 05:47:59,471 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 7 [2021-12-16 05:47:59,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:47:59,472 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2021-12-16 05:47:59,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:47:59,472 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2021-12-16 05:47:59,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-16 05:47:59,472 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:47:59,473 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:47:59,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 05:47:59,473 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:47:59,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:47:59,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029097, now seen corresponding path program 1 times [2021-12-16 05:47:59,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:47:59,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108709813] [2021-12-16 05:47:59,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:47:59,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:47:59,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:47:59,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:47:59,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:47:59,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108709813] [2021-12-16 05:47:59,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108709813] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:47:59,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:47:59,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 05:47:59,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445886824] [2021-12-16 05:47:59,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:47:59,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 05:47:59,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:47:59,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 05:47:59,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 05:47:59,603 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:47:59,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:47:59,670 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2021-12-16 05:47:59,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 05:47:59,671 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-16 05:47:59,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:47:59,672 INFO L225 Difference]: With dead ends: 44 [2021-12-16 05:47:59,672 INFO L226 Difference]: Without dead ends: 44 [2021-12-16 05:47:59,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-16 05:47:59,677 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 46 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:47:59,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 63 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:47:59,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-16 05:47:59,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2021-12-16 05:47:59,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 41 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) [2021-12-16 05:47:59,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2021-12-16 05:47:59,689 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 7 [2021-12-16 05:47:59,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:47:59,689 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2021-12-16 05:47:59,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:47:59,689 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2021-12-16 05:47:59,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-16 05:47:59,690 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:47:59,690 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:47:59,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 05:47:59,691 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:47:59,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:47:59,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1906083540, now seen corresponding path program 1 times [2021-12-16 05:47:59,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:47:59,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141321827] [2021-12-16 05:47:59,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:47:59,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:47:59,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:47:59,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:47:59,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:47:59,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141321827] [2021-12-16 05:47:59,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141321827] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:47:59,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425127250] [2021-12-16 05:47:59,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:47:59,765 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:47:59,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:47:59,781 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:47:59,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 05:47:59,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:47:59,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 05:47:59,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:47:59,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:47:59,897 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:47:59,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425127250] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:47:59,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 05:47:59,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2021-12-16 05:47:59,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629060192] [2021-12-16 05:47:59,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:47:59,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 05:47:59,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:47:59,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 05:47:59,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-16 05:47:59,899 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:47:59,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:47:59,917 INFO L93 Difference]: Finished difference Result 79 states and 89 transitions. [2021-12-16 05:47:59,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 05:47:59,918 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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 [2021-12-16 05:47:59,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:47:59,919 INFO L225 Difference]: With dead ends: 79 [2021-12-16 05:47:59,919 INFO L226 Difference]: Without dead ends: 79 [2021-12-16 05:47:59,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-16 05:47:59,920 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 107 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:47:59,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 80 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:47:59,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-12-16 05:47:59,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 49. [2021-12-16 05:47:59,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 38 states have (on average 1.4736842105263157) internal successors, (56), 48 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:47:59,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2021-12-16 05:47:59,924 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 11 [2021-12-16 05:47:59,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:47:59,924 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2021-12-16 05:47:59,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:47:59,924 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2021-12-16 05:47:59,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-16 05:47:59,925 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:47:59,925 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:47:59,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 05:48:00,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:00,145 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:00,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:00,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2021-12-16 05:48:00,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:00,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141537197] [2021-12-16 05:48:00,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:00,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:00,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:00,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:48:00,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:00,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141537197] [2021-12-16 05:48:00,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141537197] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:48:00,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626388150] [2021-12-16 05:48:00,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:00,226 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:00,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:48:00,228 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:48:00,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 05:48:00,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:00,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-16 05:48:00,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:48:00,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:48:00,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-16 05:48:00,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-16 05:48:00,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:48:00,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:48:00,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:48:00,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626388150] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:48:00,599 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:48:00,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2021-12-16 05:48:00,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736807728] [2021-12-16 05:48:00,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:48:00,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-16 05:48:00,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:00,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-16 05:48:00,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-12-16 05:48:00,604 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:00,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:00,691 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2021-12-16 05:48:00,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 05:48:00,692 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-16 05:48:00,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:00,693 INFO L225 Difference]: With dead ends: 50 [2021-12-16 05:48:00,693 INFO L226 Difference]: Without dead ends: 50 [2021-12-16 05:48:00,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-12-16 05:48:00,695 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 79 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:00,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 119 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:48:00,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-16 05:48:00,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2021-12-16 05:48:00,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 37 states have (on average 1.4594594594594594) internal successors, (54), 46 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:00,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2021-12-16 05:48:00,719 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 11 [2021-12-16 05:48:00,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:00,720 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2021-12-16 05:48:00,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:00,720 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2021-12-16 05:48:00,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-16 05:48:00,720 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:00,721 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:48:00,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 05:48:00,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-16 05:48:00,935 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:00,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:00,936 INFO L85 PathProgramCache]: Analyzing trace with hash -2090265437, now seen corresponding path program 1 times [2021-12-16 05:48:00,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:00,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963047373] [2021-12-16 05:48:00,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:00,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:00,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:00,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:00,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:00,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963047373] [2021-12-16 05:48:00,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963047373] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:48:00,968 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:48:00,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 05:48:00,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326678223] [2021-12-16 05:48:00,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:48:00,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:48:00,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:00,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:48:00,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:48:00,969 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:00,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:00,985 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2021-12-16 05:48:00,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 05:48:00,986 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-16 05:48:00,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:00,986 INFO L225 Difference]: With dead ends: 53 [2021-12-16 05:48:00,987 INFO L226 Difference]: Without dead ends: 53 [2021-12-16 05:48:00,987 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 [2021-12-16 05:48:00,987 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 43 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:00,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 70 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:48:00,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-16 05:48:00,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2021-12-16 05:48:00,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 47 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) [2021-12-16 05:48:00,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2021-12-16 05:48:00,996 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 13 [2021-12-16 05:48:00,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:00,996 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2021-12-16 05:48:00,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:00,997 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2021-12-16 05:48:00,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-16 05:48:00,997 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:00,997 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:48:00,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-16 05:48:00,997 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:00,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:00,998 INFO L85 PathProgramCache]: Analyzing trace with hash -2090265385, now seen corresponding path program 1 times [2021-12-16 05:48:00,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:00,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292941454] [2021-12-16 05:48:00,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:00,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:01,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:01,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:01,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:01,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292941454] [2021-12-16 05:48:01,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292941454] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:48:01,019 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:48:01,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 05:48:01,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306008996] [2021-12-16 05:48:01,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:48:01,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 05:48:01,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:01,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 05:48:01,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:48:01,021 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:01,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:01,034 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2021-12-16 05:48:01,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 05:48:01,035 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-16 05:48:01,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:01,036 INFO L225 Difference]: With dead ends: 46 [2021-12-16 05:48:01,036 INFO L226 Difference]: Without dead ends: 46 [2021-12-16 05:48:01,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:48:01,036 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 27 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:01,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 35 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:48:01,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-16 05:48:01,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-12-16 05:48:01,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 38 states have (on average 1.394736842105263) internal successors, (53), 45 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:01,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2021-12-16 05:48:01,039 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 13 [2021-12-16 05:48:01,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:01,039 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2021-12-16 05:48:01,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:01,040 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2021-12-16 05:48:01,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-16 05:48:01,040 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:01,040 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:48:01,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-16 05:48:01,040 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:01,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:01,041 INFO L85 PathProgramCache]: Analyzing trace with hash -2090265384, now seen corresponding path program 1 times [2021-12-16 05:48:01,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:01,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160997534] [2021-12-16 05:48:01,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:01,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:01,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:01,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:01,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:01,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160997534] [2021-12-16 05:48:01,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160997534] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:48:01,095 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:48:01,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 05:48:01,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571850503] [2021-12-16 05:48:01,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:48:01,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 05:48:01,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:01,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 05:48:01,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-16 05:48:01,096 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:01,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:01,128 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2021-12-16 05:48:01,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 05:48:01,128 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-16 05:48:01,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:01,130 INFO L225 Difference]: With dead ends: 48 [2021-12-16 05:48:01,130 INFO L226 Difference]: Without dead ends: 48 [2021-12-16 05:48:01,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-16 05:48:01,131 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 44 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:01,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 58 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:48:01,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-16 05:48:01,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-12-16 05:48:01,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 39 states have (on average 1.358974358974359) internal successors, (53), 45 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:01,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2021-12-16 05:48:01,136 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 13 [2021-12-16 05:48:01,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:01,136 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2021-12-16 05:48:01,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:01,136 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2021-12-16 05:48:01,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-16 05:48:01,137 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:01,137 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:48:01,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-16 05:48:01,137 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:01,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:01,138 INFO L85 PathProgramCache]: Analyzing trace with hash -862198810, now seen corresponding path program 1 times [2021-12-16 05:48:01,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:01,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012387582] [2021-12-16 05:48:01,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:01,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:01,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:01,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:01,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:01,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012387582] [2021-12-16 05:48:01,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012387582] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:48:01,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685360151] [2021-12-16 05:48:01,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:01,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:01,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:48:01,235 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:48:01,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 05:48:01,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:01,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 05:48:01,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:48:01,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:01,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:48:01,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-12-16 05:48:01,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:01,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685360151] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:48:01,493 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:48:01,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2021-12-16 05:48:01,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562413695] [2021-12-16 05:48:01,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:48:01,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-16 05:48:01,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:01,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-16 05:48:01,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-12-16 05:48:01,495 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 10 states, 9 states have (on average 4.777777777777778) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:01,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:01,583 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2021-12-16 05:48:01,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 05:48:01,583 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.777777777777778) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-16 05:48:01,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:01,584 INFO L225 Difference]: With dead ends: 74 [2021-12-16 05:48:01,584 INFO L226 Difference]: Without dead ends: 74 [2021-12-16 05:48:01,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-12-16 05:48:01,585 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 170 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:01,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 153 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:48:01,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-16 05:48:01,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 54. [2021-12-16 05:48:01,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 47 states have (on average 1.3404255319148937) internal successors, (63), 53 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:01,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2021-12-16 05:48:01,587 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 17 [2021-12-16 05:48:01,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:01,587 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2021-12-16 05:48:01,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.777777777777778) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:01,588 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2021-12-16 05:48:01,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-16 05:48:01,588 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:01,588 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:48:01,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 05:48:01,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:01,803 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:01,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:01,804 INFO L85 PathProgramCache]: Analyzing trace with hash -862198757, now seen corresponding path program 1 times [2021-12-16 05:48:01,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:01,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592558430] [2021-12-16 05:48:01,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:01,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:01,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:01,847 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:01,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:01,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592558430] [2021-12-16 05:48:01,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592558430] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:48:01,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363538154] [2021-12-16 05:48:01,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:01,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:01,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:48:01,849 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:48:01,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 05:48:01,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:01,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 05:48:01,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:48:01,942 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:01,943 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:48:01,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363538154] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:48:01,943 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 05:48:01,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2021-12-16 05:48:01,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824553841] [2021-12-16 05:48:01,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:48:01,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 05:48:01,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:01,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 05:48:01,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-16 05:48:01,944 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 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) [2021-12-16 05:48:01,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:01,960 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2021-12-16 05:48:01,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 05:48:01,960 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-16 05:48:01,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:01,961 INFO L225 Difference]: With dead ends: 100 [2021-12-16 05:48:01,961 INFO L226 Difference]: Without dead ends: 100 [2021-12-16 05:48:01,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-16 05:48:01,962 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 52 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:01,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 103 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:48:01,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-12-16 05:48:01,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 78. [2021-12-16 05:48:01,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 71 states have (on average 1.2394366197183098) internal successors, (88), 77 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:01,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 88 transitions. [2021-12-16 05:48:01,983 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 88 transitions. Word has length 17 [2021-12-16 05:48:01,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:01,983 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 88 transitions. [2021-12-16 05:48:01,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 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) [2021-12-16 05:48:01,984 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 88 transitions. [2021-12-16 05:48:01,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-16 05:48:01,985 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:01,985 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:48:02,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 05:48:02,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:02,195 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:02,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:02,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1873316007, now seen corresponding path program 1 times [2021-12-16 05:48:02,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:02,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434106950] [2021-12-16 05:48:02,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:02,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:02,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:02,243 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:02,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:02,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434106950] [2021-12-16 05:48:02,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434106950] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:48:02,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074928824] [2021-12-16 05:48:02,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:02,244 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:02,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:48:02,245 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:48:02,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 05:48:02,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:02,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-16 05:48:02,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:48:02,330 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-16 05:48:02,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-16 05:48:02,426 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:02,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:48:02,580 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:02,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074928824] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:48:02,581 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:48:02,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2021-12-16 05:48:02,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905737762] [2021-12-16 05:48:02,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:48:02,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-16 05:48:02,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:02,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-16 05:48:02,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-12-16 05:48:02,582 INFO L87 Difference]: Start difference. First operand 78 states and 88 transitions. Second operand has 13 states, 12 states have (on average 3.5) internal successors, (42), 13 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) [2021-12-16 05:48:02,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:02,640 INFO L93 Difference]: Finished difference Result 81 states and 90 transitions. [2021-12-16 05:48:02,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 05:48:02,641 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.5) internal successors, (42), 13 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 17 [2021-12-16 05:48:02,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:02,641 INFO L225 Difference]: With dead ends: 81 [2021-12-16 05:48:02,641 INFO L226 Difference]: Without dead ends: 81 [2021-12-16 05:48:02,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-12-16 05:48:02,642 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 89 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:02,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 101 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:48:02,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-12-16 05:48:02,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 75. [2021-12-16 05:48:02,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 69 states have (on average 1.2173913043478262) internal successors, (84), 74 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:02,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 84 transitions. [2021-12-16 05:48:02,644 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 84 transitions. Word has length 17 [2021-12-16 05:48:02,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:02,645 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 84 transitions. [2021-12-16 05:48:02,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.5) internal successors, (42), 13 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) [2021-12-16 05:48:02,645 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 84 transitions. [2021-12-16 05:48:02,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-16 05:48:02,645 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:02,646 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:48:02,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-16 05:48:02,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-16 05:48:02,853 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:02,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:02,853 INFO L85 PathProgramCache]: Analyzing trace with hash -2142062488, now seen corresponding path program 1 times [2021-12-16 05:48:02,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:02,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788529967] [2021-12-16 05:48:02,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:02,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:02,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:02,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:02,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:02,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788529967] [2021-12-16 05:48:02,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788529967] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:48:02,920 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:48:02,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 05:48:02,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851604626] [2021-12-16 05:48:02,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:48:02,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 05:48:02,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:02,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 05:48:02,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-12-16 05:48:02,922 INFO L87 Difference]: Start difference. First operand 75 states and 84 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-12-16 05:48:02,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:02,955 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2021-12-16 05:48:02,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 05:48:02,955 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-16 05:48:02,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:02,957 INFO L225 Difference]: With dead ends: 74 [2021-12-16 05:48:02,957 INFO L226 Difference]: Without dead ends: 74 [2021-12-16 05:48:02,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2021-12-16 05:48:02,957 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 90 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:02,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 54 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:48:02,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-16 05:48:02,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 61. [2021-12-16 05:48:02,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.2321428571428572) internal successors, (69), 60 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) [2021-12-16 05:48:02,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2021-12-16 05:48:02,962 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 17 [2021-12-16 05:48:02,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:02,962 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2021-12-16 05:48:02,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-12-16 05:48:02,962 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2021-12-16 05:48:02,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-16 05:48:02,963 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:02,963 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:48:02,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-16 05:48:02,963 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:02,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:02,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1835484247, now seen corresponding path program 1 times [2021-12-16 05:48:02,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:02,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149125976] [2021-12-16 05:48:02,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:02,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:02,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:02,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:02,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:02,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149125976] [2021-12-16 05:48:02,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149125976] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:48:02,996 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:48:02,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 05:48:02,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116405471] [2021-12-16 05:48:02,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:48:02,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 05:48:02,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:02,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 05:48:02,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 05:48:02,997 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:03,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:03,023 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2021-12-16 05:48:03,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 05:48:03,023 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-16 05:48:03,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:03,023 INFO L225 Difference]: With dead ends: 60 [2021-12-16 05:48:03,023 INFO L226 Difference]: Without dead ends: 60 [2021-12-16 05:48:03,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-16 05:48:03,024 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 35 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:03,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 64 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:48:03,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-16 05:48:03,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-12-16 05:48:03,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 56 states have (on average 1.2142857142857142) internal successors, (68), 59 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:03,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2021-12-16 05:48:03,026 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 21 [2021-12-16 05:48:03,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:03,026 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2021-12-16 05:48:03,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:03,026 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2021-12-16 05:48:03,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-16 05:48:03,028 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:03,028 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:48:03,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-16 05:48:03,029 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:03,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:03,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1835484246, now seen corresponding path program 1 times [2021-12-16 05:48:03,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:03,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585518072] [2021-12-16 05:48:03,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:03,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:03,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:03,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:03,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:03,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585518072] [2021-12-16 05:48:03,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585518072] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:48:03,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117452743] [2021-12-16 05:48:03,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:03,081 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:03,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:48:03,082 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:48:03,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 05:48:03,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:03,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-16 05:48:03,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:48:03,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:03,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:48:03,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-12-16 05:48:03,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:03,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117452743] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:48:03,307 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:48:03,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2021-12-16 05:48:03,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866246787] [2021-12-16 05:48:03,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:48:03,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-16 05:48:03,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:03,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-16 05:48:03,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-16 05:48:03,308 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 11 states, 10 states have (on average 3.8) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:03,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:03,394 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2021-12-16 05:48:03,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 05:48:03,394 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.8) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-16 05:48:03,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:03,395 INFO L225 Difference]: With dead ends: 70 [2021-12-16 05:48:03,395 INFO L226 Difference]: Without dead ends: 70 [2021-12-16 05:48:03,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-12-16 05:48:03,395 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 68 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:03,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 112 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:48:03,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-16 05:48:03,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 62. [2021-12-16 05:48:03,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 58 states have (on average 1.206896551724138) internal successors, (70), 61 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:03,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2021-12-16 05:48:03,397 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 21 [2021-12-16 05:48:03,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:03,397 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2021-12-16 05:48:03,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.8) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:03,398 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2021-12-16 05:48:03,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-16 05:48:03,398 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:03,398 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:48:03,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-16 05:48:03,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:03,612 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:03,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:03,613 INFO L85 PathProgramCache]: Analyzing trace with hash -618546161, now seen corresponding path program 1 times [2021-12-16 05:48:03,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:03,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918988182] [2021-12-16 05:48:03,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:03,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:03,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:03,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:03,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:03,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918988182] [2021-12-16 05:48:03,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918988182] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:48:03,639 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:48:03,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 05:48:03,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940767779] [2021-12-16 05:48:03,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:48:03,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 05:48:03,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:03,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 05:48:03,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 05:48:03,640 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 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) [2021-12-16 05:48:03,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:03,679 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2021-12-16 05:48:03,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 05:48:03,680 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-16 05:48:03,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:03,680 INFO L225 Difference]: With dead ends: 65 [2021-12-16 05:48:03,680 INFO L226 Difference]: Without dead ends: 65 [2021-12-16 05:48:03,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-16 05:48:03,681 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 49 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:03,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 89 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:48:03,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-16 05:48:03,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 61. [2021-12-16 05:48:03,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 58 states have (on average 1.1896551724137931) internal successors, (69), 60 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) [2021-12-16 05:48:03,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2021-12-16 05:48:03,683 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 25 [2021-12-16 05:48:03,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:03,683 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2021-12-16 05:48:03,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 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) [2021-12-16 05:48:03,683 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2021-12-16 05:48:03,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-16 05:48:03,684 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:03,684 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:48:03,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-16 05:48:03,684 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:03,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:03,685 INFO L85 PathProgramCache]: Analyzing trace with hash -618546160, now seen corresponding path program 1 times [2021-12-16 05:48:03,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:03,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662085497] [2021-12-16 05:48:03,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:03,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:03,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:03,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 05:48:03,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:03,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662085497] [2021-12-16 05:48:03,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662085497] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:48:03,733 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:48:03,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 05:48:03,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977602357] [2021-12-16 05:48:03,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:48:03,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 05:48:03,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:03,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 05:48:03,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 05:48:03,735 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 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) [2021-12-16 05:48:03,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:03,792 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2021-12-16 05:48:03,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 05:48:03,793 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-16 05:48:03,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:03,793 INFO L225 Difference]: With dead ends: 65 [2021-12-16 05:48:03,793 INFO L226 Difference]: Without dead ends: 65 [2021-12-16 05:48:03,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-12-16 05:48:03,794 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 78 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:03,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 91 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:48:03,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-16 05:48:03,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2021-12-16 05:48:03,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 62 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:03,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2021-12-16 05:48:03,796 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 25 [2021-12-16 05:48:03,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:03,796 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2021-12-16 05:48:03,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 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) [2021-12-16 05:48:03,796 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2021-12-16 05:48:03,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-16 05:48:03,796 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:03,797 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:48:03,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-16 05:48:03,797 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:03,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:03,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1995099464, now seen corresponding path program 1 times [2021-12-16 05:48:03,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:03,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076531922] [2021-12-16 05:48:03,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:03,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:03,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:03,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 05:48:03,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:03,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076531922] [2021-12-16 05:48:03,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076531922] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:48:03,842 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:48:03,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 05:48:03,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427473755] [2021-12-16 05:48:03,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:48:03,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:48:03,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:03,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:48:03,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:48:03,843 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 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) [2021-12-16 05:48:03,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:03,856 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2021-12-16 05:48:03,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 05:48:03,856 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-16 05:48:03,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:03,856 INFO L225 Difference]: With dead ends: 62 [2021-12-16 05:48:03,856 INFO L226 Difference]: Without dead ends: 59 [2021-12-16 05:48:03,857 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 [2021-12-16 05:48:03,857 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 12 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:03,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 56 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:48:03,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-16 05:48:03,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-12-16 05:48:03,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 57 states have (on average 1.1578947368421053) internal successors, (66), 58 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:03,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2021-12-16 05:48:03,858 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 26 [2021-12-16 05:48:03,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:03,859 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2021-12-16 05:48:03,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 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) [2021-12-16 05:48:03,859 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2021-12-16 05:48:03,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-16 05:48:03,859 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:03,859 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:48:03,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-16 05:48:03,859 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:03,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:03,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1127339532, now seen corresponding path program 1 times [2021-12-16 05:48:03,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:03,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448827679] [2021-12-16 05:48:03,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:03,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:03,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:03,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:03,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:03,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448827679] [2021-12-16 05:48:03,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448827679] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:48:03,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529521668] [2021-12-16 05:48:03,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:03,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:03,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:48:03,951 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:48:03,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-16 05:48:04,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:04,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-16 05:48:04,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:48:04,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-16 05:48:04,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-16 05:48:04,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-16 05:48:04,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-16 05:48:04,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 05:48:04,161 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:48:04,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529521668] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:48:04,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 05:48:04,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 13 [2021-12-16 05:48:04,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429913157] [2021-12-16 05:48:04,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:48:04,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-16 05:48:04,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:04,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-16 05:48:04,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-12-16 05:48:04,164 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 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) [2021-12-16 05:48:04,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:04,292 INFO L93 Difference]: Finished difference Result 78 states and 85 transitions. [2021-12-16 05:48:04,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 05:48:04,293 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 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) Word has length 29 [2021-12-16 05:48:04,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:04,293 INFO L225 Difference]: With dead ends: 78 [2021-12-16 05:48:04,293 INFO L226 Difference]: Without dead ends: 46 [2021-12-16 05:48:04,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-12-16 05:48:04,294 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 23 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:04,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 196 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:48:04,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-16 05:48:04,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-12-16 05:48:04,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 45 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:04,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-12-16 05:48:04,296 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 29 [2021-12-16 05:48:04,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:04,296 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-12-16 05:48:04,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 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) [2021-12-16 05:48:04,296 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-12-16 05:48:04,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-16 05:48:04,297 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:04,297 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:48:04,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-16 05:48:04,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:04,511 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:04,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:04,511 INFO L85 PathProgramCache]: Analyzing trace with hash 795888502, now seen corresponding path program 1 times [2021-12-16 05:48:04,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:04,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80774522] [2021-12-16 05:48:04,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:04,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:04,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:04,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:04,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:04,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80774522] [2021-12-16 05:48:04,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80774522] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:48:04,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003384161] [2021-12-16 05:48:04,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:04,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:04,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:48:04,635 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:48:04,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-16 05:48:04,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:04,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-16 05:48:04,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:48:04,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-16 05:48:04,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 05:48:04,906 INFO L354 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2021-12-16 05:48:04,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2021-12-16 05:48:04,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 05:48:04,997 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:48:04,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2021-12-16 05:48:05,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:05,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:48:06,576 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~nondetString2~0#1.base| Int)) (= (select (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| |c_ULTIMATE.start_main_~length2~0#1| (- 1)) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0)) is different from false [2021-12-16 05:48:06,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2021-12-16 05:48:06,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:06,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003384161] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:48:06,698 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:48:06,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 12] total 24 [2021-12-16 05:48:06,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766754037] [2021-12-16 05:48:06,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:48:06,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-16 05:48:06,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:06,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-16 05:48:06,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=427, Unknown=1, NotChecked=42, Total=552 [2021-12-16 05:48:06,699 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:08,860 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (exists ((|ULTIMATE.start_main_~length1~0#1| Int)) (and (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |ULTIMATE.start_main_~length1~0#1| (- 1))) 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 1))) (= |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 1 |c_ULTIMATE.start_main_~length1~0#1|) (= 1 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |c_ULTIMATE.start_main_~length1~0#1|)) (not (= |c_ULTIMATE.start_main_~nondetString1~0#1.base| |c_ULTIMATE.start_main_~nondetString2~0#1.base|)) (<= |c_ULTIMATE.start_main_~i~0#1| 1) (<= |c_ULTIMATE.start_main_~length1~0#1| 1) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base|) |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0) (forall ((|ULTIMATE.start_main_~nondetString2~0#1.base| Int)) (= (select (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| |c_ULTIMATE.start_main_~length2~0#1| (- 1)) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0)) (= 0 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) (= |c_ULTIMATE.start_main_~length2~0#1| 1)) is different from false [2021-12-16 05:48:10,868 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= 1 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |c_ULTIMATE.start_main_~length1~0#1|)) (not (= |c_ULTIMATE.start_main_~nondetString1~0#1.base| |c_ULTIMATE.start_main_~nondetString2~0#1.base|)) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base|) |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0) (forall ((|ULTIMATE.start_main_~nondetString2~0#1.base| Int)) (= (select (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| |c_ULTIMATE.start_main_~length2~0#1| (- 1)) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0))) is different from false [2021-12-16 05:48:10,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:10,915 INFO L93 Difference]: Finished difference Result 99 states and 107 transitions. [2021-12-16 05:48:10,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-16 05:48:10,916 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-16 05:48:10,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:10,916 INFO L225 Difference]: With dead ends: 99 [2021-12-16 05:48:10,916 INFO L226 Difference]: Without dead ends: 78 [2021-12-16 05:48:10,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=154, Invalid=725, Unknown=3, NotChecked=174, Total=1056 [2021-12-16 05:48:10,917 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 131 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:10,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 263 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 192 Invalid, 0 Unknown, 80 Unchecked, 0.1s Time] [2021-12-16 05:48:10,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-16 05:48:10,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 54. [2021-12-16 05:48:10,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 52 states have (on average 1.1346153846153846) internal successors, (59), 53 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) [2021-12-16 05:48:10,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2021-12-16 05:48:10,920 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 29 [2021-12-16 05:48:10,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:10,920 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2021-12-16 05:48:10,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:10,920 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2021-12-16 05:48:10,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-16 05:48:10,921 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:10,921 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:48:10,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-16 05:48:11,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-16 05:48:11,127 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:11,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:11,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1769750649, now seen corresponding path program 2 times [2021-12-16 05:48:11,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:11,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022089038] [2021-12-16 05:48:11,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:11,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:11,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:11,237 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:11,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:11,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022089038] [2021-12-16 05:48:11,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022089038] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:48:11,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723023176] [2021-12-16 05:48:11,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 05:48:11,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:11,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:48:11,239 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:48:11,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-16 05:48:11,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 05:48:11,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:48:11,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-16 05:48:11,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:48:11,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:48:11,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-16 05:48:11,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-16 05:48:11,554 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:11,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:48:11,819 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:11,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723023176] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:48:11,820 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:48:11,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2021-12-16 05:48:11,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235453622] [2021-12-16 05:48:11,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:48:11,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-16 05:48:11,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:11,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-16 05:48:11,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-12-16 05:48:11,824 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand has 23 states, 22 states have (on average 4.136363636363637) internal successors, (91), 23 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:12,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:12,069 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2021-12-16 05:48:12,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 05:48:12,070 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 4.136363636363637) internal successors, (91), 23 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-12-16 05:48:12,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:12,070 INFO L225 Difference]: With dead ends: 68 [2021-12-16 05:48:12,070 INFO L226 Difference]: Without dead ends: 68 [2021-12-16 05:48:12,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=182, Invalid=748, Unknown=0, NotChecked=0, Total=930 [2021-12-16 05:48:12,071 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 184 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:12,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 147 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:48:12,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-12-16 05:48:12,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2021-12-16 05:48:12,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 63 states have (on average 1.1428571428571428) internal successors, (72), 64 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:12,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2021-12-16 05:48:12,072 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 33 [2021-12-16 05:48:12,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:12,072 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2021-12-16 05:48:12,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 4.136363636363637) internal successors, (91), 23 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:12,072 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2021-12-16 05:48:12,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-16 05:48:12,073 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:12,073 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:48:12,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-16 05:48:12,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:12,273 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:12,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:12,274 INFO L85 PathProgramCache]: Analyzing trace with hash -972218812, now seen corresponding path program 1 times [2021-12-16 05:48:12,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:12,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654072276] [2021-12-16 05:48:12,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:12,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:12,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:12,368 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-16 05:48:12,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:12,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654072276] [2021-12-16 05:48:12,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654072276] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:48:12,368 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:48:12,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-16 05:48:12,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107860798] [2021-12-16 05:48:12,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:48:12,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-16 05:48:12,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:12,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-16 05:48:12,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-16 05:48:12,369 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:12,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:12,525 INFO L93 Difference]: Finished difference Result 88 states and 95 transitions. [2021-12-16 05:48:12,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 05:48:12,526 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-16 05:48:12,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:12,526 INFO L225 Difference]: With dead ends: 88 [2021-12-16 05:48:12,526 INFO L226 Difference]: Without dead ends: 88 [2021-12-16 05:48:12,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2021-12-16 05:48:12,526 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 59 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:12,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 183 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:48:12,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-12-16 05:48:12,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2021-12-16 05:48:12,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 84 states have (on average 1.119047619047619) internal successors, (94), 85 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) [2021-12-16 05:48:12,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 94 transitions. [2021-12-16 05:48:12,528 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 94 transitions. Word has length 34 [2021-12-16 05:48:12,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:12,528 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 94 transitions. [2021-12-16 05:48:12,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:12,528 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 94 transitions. [2021-12-16 05:48:12,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-16 05:48:12,529 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:12,529 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:48:12,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-16 05:48:12,529 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:12,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:12,529 INFO L85 PathProgramCache]: Analyzing trace with hash -270618938, now seen corresponding path program 1 times [2021-12-16 05:48:12,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:12,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940897662] [2021-12-16 05:48:12,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:12,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:12,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:12,662 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-16 05:48:12,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:12,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940897662] [2021-12-16 05:48:12,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940897662] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:48:12,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91930136] [2021-12-16 05:48:12,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:12,663 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:12,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:48:12,664 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:48:12,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-16 05:48:12,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:12,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-16 05:48:12,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:48:12,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-16 05:48:12,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-16 05:48:12,862 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-16 05:48:12,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:48:12,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2021-12-16 05:48:12,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-16 05:48:13,015 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-16 05:48:13,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91930136] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:48:13,015 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:48:13,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 20 [2021-12-16 05:48:13,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945279928] [2021-12-16 05:48:13,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:48:13,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-16 05:48:13,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:13,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-16 05:48:13,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-12-16 05:48:13,017 INFO L87 Difference]: Start difference. First operand 86 states and 94 transitions. Second operand has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:13,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:13,288 INFO L93 Difference]: Finished difference Result 116 states and 125 transitions. [2021-12-16 05:48:13,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-16 05:48:13,289 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-16 05:48:13,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:13,289 INFO L225 Difference]: With dead ends: 116 [2021-12-16 05:48:13,289 INFO L226 Difference]: Without dead ends: 116 [2021-12-16 05:48:13,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=330, Invalid=860, Unknown=0, NotChecked=0, Total=1190 [2021-12-16 05:48:13,290 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 154 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:13,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 245 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:48:13,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-12-16 05:48:13,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 90. [2021-12-16 05:48:13,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 88 states have (on average 1.125) internal successors, (99), 89 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:13,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2021-12-16 05:48:13,293 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 34 [2021-12-16 05:48:13,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:13,293 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2021-12-16 05:48:13,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:13,293 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2021-12-16 05:48:13,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-16 05:48:13,293 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:13,293 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:48:13,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-16 05:48:13,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-16 05:48:13,510 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:13,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:13,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1855891613, now seen corresponding path program 2 times [2021-12-16 05:48:13,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:13,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600971537] [2021-12-16 05:48:13,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:13,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:13,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:13,625 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-16 05:48:13,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:13,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600971537] [2021-12-16 05:48:13,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600971537] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:48:13,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664728852] [2021-12-16 05:48:13,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 05:48:13,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:13,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:48:13,627 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:48:13,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-16 05:48:13,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 05:48:13,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:48:13,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-16 05:48:13,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:48:13,829 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-16 05:48:13,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:48:13,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-16 05:48:13,997 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-16 05:48:13,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664728852] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:48:13,998 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:48:13,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 24 [2021-12-16 05:48:13,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653227276] [2021-12-16 05:48:13,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:48:13,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-16 05:48:13,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:13,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-16 05:48:13,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-12-16 05:48:13,999 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand has 25 states, 24 states have (on average 3.0) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:14,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:14,319 INFO L93 Difference]: Finished difference Result 112 states and 124 transitions. [2021-12-16 05:48:14,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-16 05:48:14,320 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 3.0) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-12-16 05:48:14,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:14,320 INFO L225 Difference]: With dead ends: 112 [2021-12-16 05:48:14,320 INFO L226 Difference]: Without dead ends: 112 [2021-12-16 05:48:14,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=213, Invalid=843, Unknown=0, NotChecked=0, Total=1056 [2021-12-16 05:48:14,321 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 171 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:14,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 335 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:48:14,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-12-16 05:48:14,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 100. [2021-12-16 05:48:14,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 98 states have (on average 1.1326530612244898) internal successors, (111), 99 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:14,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 111 transitions. [2021-12-16 05:48:14,323 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 111 transitions. Word has length 38 [2021-12-16 05:48:14,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:14,323 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 111 transitions. [2021-12-16 05:48:14,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 3.0) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:14,324 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 111 transitions. [2021-12-16 05:48:14,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-16 05:48:14,324 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:14,324 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:48:14,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-16 05:48:14,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-16 05:48:14,541 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:14,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:14,541 INFO L85 PathProgramCache]: Analyzing trace with hash 759394243, now seen corresponding path program 3 times [2021-12-16 05:48:14,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:14,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684331025] [2021-12-16 05:48:14,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:14,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:14,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:14,877 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:14,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:14,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684331025] [2021-12-16 05:48:14,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684331025] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:48:14,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589080569] [2021-12-16 05:48:14,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 05:48:14,877 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:14,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:48:14,878 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) [2021-12-16 05:48:14,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-16 05:48:14,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-16 05:48:14,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:48:14,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-16 05:48:14,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:48:14,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-16 05:48:15,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-16 05:48:15,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-16 05:48:15,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 05:48:15,466 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:48:15,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2021-12-16 05:48:15,476 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:15,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:48:15,571 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_416 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_416) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0)) is different from false [2021-12-16 05:48:15,577 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:48:15,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-16 05:48:15,582 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:48:15,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-16 05:48:15,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-16 05:48:15,793 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:15,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589080569] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:48:15,793 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:48:15,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15, 14] total 40 [2021-12-16 05:48:15,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672141432] [2021-12-16 05:48:15,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:48:15,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-16 05:48:15,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:15,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-16 05:48:15,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1343, Unknown=1, NotChecked=74, Total=1560 [2021-12-16 05:48:15,794 INFO L87 Difference]: Start difference. First operand 100 states and 111 transitions. Second operand has 40 states, 40 states have (on average 2.45) internal successors, (98), 40 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:16,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:16,226 INFO L93 Difference]: Finished difference Result 175 states and 190 transitions. [2021-12-16 05:48:16,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-16 05:48:16,226 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.45) internal successors, (98), 40 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-16 05:48:16,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:16,227 INFO L225 Difference]: With dead ends: 175 [2021-12-16 05:48:16,227 INFO L226 Difference]: Without dead ends: 146 [2021-12-16 05:48:16,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=279, Invalid=2376, Unknown=1, NotChecked=100, Total=2756 [2021-12-16 05:48:16,236 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 236 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:16,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 391 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 349 Invalid, 0 Unknown, 62 Unchecked, 0.2s Time] [2021-12-16 05:48:16,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-12-16 05:48:16,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 137. [2021-12-16 05:48:16,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 135 states have (on average 1.1185185185185185) internal successors, (151), 136 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:16,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 151 transitions. [2021-12-16 05:48:16,238 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 151 transitions. Word has length 41 [2021-12-16 05:48:16,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:16,238 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 151 transitions. [2021-12-16 05:48:16,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.45) internal successors, (98), 40 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:16,239 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 151 transitions. [2021-12-16 05:48:16,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-16 05:48:16,239 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:16,239 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:48:16,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-16 05:48:16,447 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,SelfDestructingSolverStorable22 [2021-12-16 05:48:16,447 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:16,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:16,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1122231478, now seen corresponding path program 3 times [2021-12-16 05:48:16,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:16,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730814682] [2021-12-16 05:48:16,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:16,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:16,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:16,645 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-16 05:48:16,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:16,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730814682] [2021-12-16 05:48:16,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730814682] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:48:16,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234977993] [2021-12-16 05:48:16,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 05:48:16,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:16,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:48:16,647 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) [2021-12-16 05:48:16,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-16 05:48:16,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-16 05:48:16,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:48:16,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 86 conjunts are in the unsatisfiable core [2021-12-16 05:48:16,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:48:16,750 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-16 05:48:16,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-16 05:48:16,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-16 05:48:17,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-16 05:48:17,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-16 05:48:17,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-12-16 05:48:17,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 05:48:17,932 INFO L354 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2021-12-16 05:48:17,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 18 [2021-12-16 05:48:17,942 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:48:17,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:48:18,189 INFO L354 Elim1Store]: treesize reduction 23, result has 46.5 percent of original size [2021-12-16 05:48:18,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 76 [2021-12-16 05:48:18,196 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:48:18,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2021-12-16 05:48:18,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-16 05:48:18,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 05:48:18,223 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:48:18,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 61 [2021-12-16 05:48:19,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 05:48:19,099 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-12-16 05:48:19,103 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:48:19,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234977993] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:48:19,103 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:48:19,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 23, 22] total 53 [2021-12-16 05:48:19,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118456463] [2021-12-16 05:48:19,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:48:19,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-16 05:48:19,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:19,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-16 05:48:19,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=2465, Unknown=0, NotChecked=0, Total=2756 [2021-12-16 05:48:19,105 INFO L87 Difference]: Start difference. First operand 137 states and 151 transitions. Second operand has 53 states, 53 states have (on average 2.056603773584906) internal successors, (109), 53 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:21,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:21,309 INFO L93 Difference]: Finished difference Result 214 states and 233 transitions. [2021-12-16 05:48:21,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-16 05:48:21,319 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.056603773584906) internal successors, (109), 53 states have internal predecessors, (109), 0 states have call successors, (0), 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 43 [2021-12-16 05:48:21,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:21,320 INFO L225 Difference]: With dead ends: 214 [2021-12-16 05:48:21,320 INFO L226 Difference]: Without dead ends: 198 [2021-12-16 05:48:21,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2642 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=993, Invalid=7749, Unknown=0, NotChecked=0, Total=8742 [2021-12-16 05:48:21,322 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 385 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:21,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [385 Valid, 460 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 501 Invalid, 0 Unknown, 143 Unchecked, 0.3s Time] [2021-12-16 05:48:21,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-12-16 05:48:21,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 161. [2021-12-16 05:48:21,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 159 states have (on average 1.1132075471698113) internal successors, (177), 160 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:21,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 177 transitions. [2021-12-16 05:48:21,325 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 177 transitions. Word has length 43 [2021-12-16 05:48:21,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:21,326 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 177 transitions. [2021-12-16 05:48:21,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.056603773584906) internal successors, (109), 53 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:21,326 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 177 transitions. [2021-12-16 05:48:21,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-16 05:48:21,326 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:21,326 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:48:21,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-16 05:48:21,543 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,SelfDestructingSolverStorable23 [2021-12-16 05:48:21,543 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:21,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:21,543 INFO L85 PathProgramCache]: Analyzing trace with hash -544147386, now seen corresponding path program 4 times [2021-12-16 05:48:21,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:21,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289267609] [2021-12-16 05:48:21,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:21,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:21,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:21,646 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:21,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:21,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289267609] [2021-12-16 05:48:21,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289267609] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:48:21,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269657849] [2021-12-16 05:48:21,647 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 05:48:21,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:21,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:48:21,648 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) [2021-12-16 05:48:21,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-16 05:48:21,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 05:48:21,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:48:21,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-16 05:48:21,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:48:21,866 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:21,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:48:22,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-16 05:48:22,061 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:22,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269657849] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:48:22,062 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:48:22,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2021-12-16 05:48:22,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912617800] [2021-12-16 05:48:22,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:48:22,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-16 05:48:22,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:22,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-16 05:48:22,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-12-16 05:48:22,063 INFO L87 Difference]: Start difference. First operand 161 states and 177 transitions. Second operand has 23 states, 22 states have (on average 4.590909090909091) internal successors, (101), 23 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) [2021-12-16 05:48:22,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:22,314 INFO L93 Difference]: Finished difference Result 194 states and 210 transitions. [2021-12-16 05:48:22,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 05:48:22,315 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 4.590909090909091) internal successors, (101), 23 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-12-16 05:48:22,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:22,316 INFO L225 Difference]: With dead ends: 194 [2021-12-16 05:48:22,317 INFO L226 Difference]: Without dead ends: 194 [2021-12-16 05:48:22,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=203, Invalid=789, Unknown=0, NotChecked=0, Total=992 [2021-12-16 05:48:22,318 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 195 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:22,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 409 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:48:22,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-12-16 05:48:22,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 185. [2021-12-16 05:48:22,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 183 states have (on average 1.1147540983606556) internal successors, (204), 184 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:22,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 204 transitions. [2021-12-16 05:48:22,329 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 204 transitions. Word has length 45 [2021-12-16 05:48:22,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:22,329 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 204 transitions. [2021-12-16 05:48:22,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 4.590909090909091) internal successors, (101), 23 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) [2021-12-16 05:48:22,329 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 204 transitions. [2021-12-16 05:48:22,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-16 05:48:22,330 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:22,330 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:48:22,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-16 05:48:22,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:22,543 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:22,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:22,544 INFO L85 PathProgramCache]: Analyzing trace with hash 921214137, now seen corresponding path program 4 times [2021-12-16 05:48:22,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:22,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015963464] [2021-12-16 05:48:22,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:22,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:22,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:22,693 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-16 05:48:22,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:22,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015963464] [2021-12-16 05:48:22,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015963464] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:48:22,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891480923] [2021-12-16 05:48:22,694 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 05:48:22,694 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:22,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:48:22,695 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) [2021-12-16 05:48:22,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-16 05:48:22,755 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 05:48:22,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:48:22,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-16 05:48:22,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:48:22,906 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-16 05:48:22,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:48:23,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-16 05:48:23,125 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-16 05:48:23,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891480923] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:48:23,125 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:48:23,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 27 [2021-12-16 05:48:23,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136202140] [2021-12-16 05:48:23,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:48:23,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-16 05:48:23,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:23,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-16 05:48:23,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2021-12-16 05:48:23,126 INFO L87 Difference]: Start difference. First operand 185 states and 204 transitions. Second operand has 28 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 28 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:23,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:23,482 INFO L93 Difference]: Finished difference Result 272 states and 301 transitions. [2021-12-16 05:48:23,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-16 05:48:23,483 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 28 states have internal predecessors, (95), 0 states have call successors, (0), 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 47 [2021-12-16 05:48:23,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:23,483 INFO L225 Difference]: With dead ends: 272 [2021-12-16 05:48:23,483 INFO L226 Difference]: Without dead ends: 272 [2021-12-16 05:48:23,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=295, Invalid=1187, Unknown=0, NotChecked=0, Total=1482 [2021-12-16 05:48:23,484 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 227 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:23,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 392 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:48:23,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-12-16 05:48:23,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 239. [2021-12-16 05:48:23,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 237 states have (on average 1.130801687763713) internal successors, (268), 238 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:23,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 268 transitions. [2021-12-16 05:48:23,489 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 268 transitions. Word has length 47 [2021-12-16 05:48:23,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:23,489 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 268 transitions. [2021-12-16 05:48:23,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 28 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:23,489 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 268 transitions. [2021-12-16 05:48:23,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-16 05:48:23,489 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:23,490 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:48:23,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-16 05:48:23,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-16 05:48:23,697 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:23,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:23,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1256228128, now seen corresponding path program 5 times [2021-12-16 05:48:23,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:23,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842946070] [2021-12-16 05:48:23,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:23,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:23,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:24,192 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:48:24,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:24,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842946070] [2021-12-16 05:48:24,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842946070] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:48:24,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880182703] [2021-12-16 05:48:24,192 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 05:48:24,193 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:24,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:48:24,193 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) [2021-12-16 05:48:24,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-16 05:48:24,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-16 05:48:24,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:48:24,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-16 05:48:24,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:48:24,281 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-16 05:48:24,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-16 05:48:24,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 05:48:24,602 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:48:24,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-12-16 05:48:24,749 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-16 05:48:24,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:48:25,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-16 05:48:25,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-16 05:48:25,719 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-16 05:48:25,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880182703] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:48:25,719 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:48:25,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 13, 13] total 47 [2021-12-16 05:48:25,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117326094] [2021-12-16 05:48:25,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:48:25,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-16 05:48:25,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:25,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-16 05:48:25,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=2014, Unknown=0, NotChecked=0, Total=2162 [2021-12-16 05:48:25,721 INFO L87 Difference]: Start difference. First operand 239 states and 268 transitions. Second operand has 47 states, 47 states have (on average 2.6382978723404253) internal successors, (124), 47 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:30,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:30,520 INFO L93 Difference]: Finished difference Result 289 states and 317 transitions. [2021-12-16 05:48:30,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-12-16 05:48:30,521 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.6382978723404253) internal successors, (124), 47 states have internal predecessors, (124), 0 states have call successors, (0), 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 52 [2021-12-16 05:48:30,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:30,522 INFO L225 Difference]: With dead ends: 289 [2021-12-16 05:48:30,522 INFO L226 Difference]: Without dead ends: 221 [2021-12-16 05:48:30,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2350 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1852, Invalid=10580, Unknown=0, NotChecked=0, Total=12432 [2021-12-16 05:48:30,527 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 330 mSDsluCounter, 783 mSDsCounter, 0 mSdLazyCounter, 1574 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 815 SdHoareTripleChecker+Invalid, 1867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 197 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:30,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 815 Invalid, 1867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1574 Invalid, 0 Unknown, 197 Unchecked, 0.7s Time] [2021-12-16 05:48:30,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-12-16 05:48:30,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 189. [2021-12-16 05:48:30,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 187 states have (on average 1.1336898395721926) internal successors, (212), 188 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:30,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 212 transitions. [2021-12-16 05:48:30,532 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 212 transitions. Word has length 52 [2021-12-16 05:48:30,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:30,533 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 212 transitions. [2021-12-16 05:48:30,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.6382978723404253) internal successors, (124), 47 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:30,533 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 212 transitions. [2021-12-16 05:48:30,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-16 05:48:30,533 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:30,533 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:48:30,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-16 05:48:30,747 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,SelfDestructingSolverStorable26 [2021-12-16 05:48:30,747 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:30,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:30,748 INFO L85 PathProgramCache]: Analyzing trace with hash -176289136, now seen corresponding path program 5 times [2021-12-16 05:48:30,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:30,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946981004] [2021-12-16 05:48:30,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:30,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:30,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:30,948 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 14 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:30,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:30,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946981004] [2021-12-16 05:48:30,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946981004] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:48:30,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416146799] [2021-12-16 05:48:30,949 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 05:48:30,949 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:30,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:48:30,950 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) [2021-12-16 05:48:30,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-16 05:48:31,024 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-16 05:48:31,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:48:31,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-16 05:48:31,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:48:31,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-16 05:48:31,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-16 05:48:31,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-16 05:48:31,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-16 05:48:31,333 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 14 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:31,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:48:31,412 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_610 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_610) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 2)) 0)) is different from false [2021-12-16 05:48:31,416 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:48:31,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-16 05:48:31,434 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:48:31,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-16 05:48:31,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-16 05:48:31,611 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 14 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:31,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416146799] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:48:31,611 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:48:31,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 30 [2021-12-16 05:48:31,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834542368] [2021-12-16 05:48:31,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:48:31,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-16 05:48:31,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:31,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-16 05:48:31,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=726, Unknown=1, NotChecked=54, Total=870 [2021-12-16 05:48:31,612 INFO L87 Difference]: Start difference. First operand 189 states and 212 transitions. Second operand has 30 states, 30 states have (on average 2.9) internal successors, (87), 30 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) [2021-12-16 05:48:31,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:31,989 INFO L93 Difference]: Finished difference Result 320 states and 353 transitions. [2021-12-16 05:48:31,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-16 05:48:31,989 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.9) internal successors, (87), 30 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) Word has length 53 [2021-12-16 05:48:31,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:31,990 INFO L225 Difference]: With dead ends: 320 [2021-12-16 05:48:31,990 INFO L226 Difference]: Without dead ends: 283 [2021-12-16 05:48:31,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 89 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=206, Invalid=1603, Unknown=1, NotChecked=82, Total=1892 [2021-12-16 05:48:31,991 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 107 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:31,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 583 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 462 Invalid, 0 Unknown, 82 Unchecked, 0.2s Time] [2021-12-16 05:48:31,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-12-16 05:48:31,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 264. [2021-12-16 05:48:31,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 262 states have (on average 1.118320610687023) internal successors, (293), 263 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:31,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 293 transitions. [2021-12-16 05:48:31,995 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 293 transitions. Word has length 53 [2021-12-16 05:48:31,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:31,995 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 293 transitions. [2021-12-16 05:48:31,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.9) internal successors, (87), 30 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) [2021-12-16 05:48:31,996 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 293 transitions. [2021-12-16 05:48:31,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-16 05:48:31,996 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:31,996 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:48:32,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-16 05:48:32,217 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,SelfDestructingSolverStorable27 [2021-12-16 05:48:32,217 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:32,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:32,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1235096899, now seen corresponding path program 1 times [2021-12-16 05:48:32,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:32,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967466935] [2021-12-16 05:48:32,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:32,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:32,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:32,283 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-16 05:48:32,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:32,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967466935] [2021-12-16 05:48:32,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967466935] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:48:32,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725152134] [2021-12-16 05:48:32,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:32,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:32,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:48:32,285 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) [2021-12-16 05:48:32,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-16 05:48:32,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:32,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-16 05:48:32,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:48:32,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-16 05:48:32,777 INFO L354 Elim1Store]: treesize reduction 32, result has 8.6 percent of original size [2021-12-16 05:48:32,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 14 [2021-12-16 05:48:32,787 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-16 05:48:32,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:48:32,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-12-16 05:48:32,985 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-16 05:48:32,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 45 treesize of output 39 [2021-12-16 05:48:33,148 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-16 05:48:33,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725152134] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:48:33,149 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:48:33,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 17] total 35 [2021-12-16 05:48:33,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505715576] [2021-12-16 05:48:33,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:48:33,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-16 05:48:33,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:33,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-16 05:48:33,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1075, Unknown=0, NotChecked=0, Total=1190 [2021-12-16 05:48:33,151 INFO L87 Difference]: Start difference. First operand 264 states and 293 transitions. Second operand has 35 states, 35 states have (on average 2.7714285714285714) internal successors, (97), 35 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:34,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:34,329 INFO L93 Difference]: Finished difference Result 361 states and 390 transitions. [2021-12-16 05:48:34,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-16 05:48:34,329 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.7714285714285714) internal successors, (97), 35 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) Word has length 55 [2021-12-16 05:48:34,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:34,330 INFO L225 Difference]: With dead ends: 361 [2021-12-16 05:48:34,330 INFO L226 Difference]: Without dead ends: 345 [2021-12-16 05:48:34,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 89 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1094 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=664, Invalid=4738, Unknown=0, NotChecked=0, Total=5402 [2021-12-16 05:48:34,332 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 166 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 1004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 331 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:34,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 714 Invalid, 1004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 628 Invalid, 0 Unknown, 331 Unchecked, 0.2s Time] [2021-12-16 05:48:34,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-12-16 05:48:34,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 272. [2021-12-16 05:48:34,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 270 states have (on average 1.114814814814815) internal successors, (301), 271 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:34,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 301 transitions. [2021-12-16 05:48:34,336 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 301 transitions. Word has length 55 [2021-12-16 05:48:34,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:34,336 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 301 transitions. [2021-12-16 05:48:34,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.7714285714285714) internal successors, (97), 35 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:34,336 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 301 transitions. [2021-12-16 05:48:34,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-16 05:48:34,337 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:34,337 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:48:34,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-16 05:48:34,551 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,SelfDestructingSolverStorable28 [2021-12-16 05:48:34,551 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:34,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:34,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1154213523, now seen corresponding path program 6 times [2021-12-16 05:48:34,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:34,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394664400] [2021-12-16 05:48:34,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:34,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:34,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:34,680 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:34,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:34,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394664400] [2021-12-16 05:48:34,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394664400] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:48:34,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081050989] [2021-12-16 05:48:34,680 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 05:48:34,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:34,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:48:34,681 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) [2021-12-16 05:48:34,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-16 05:48:34,766 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-16 05:48:34,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:48:34,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-16 05:48:34,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:48:34,787 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-16 05:48:34,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-16 05:48:34,999 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 18 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:34,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:48:35,365 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 28 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:35,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081050989] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:48:35,366 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:48:35,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 28 [2021-12-16 05:48:35,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560070158] [2021-12-16 05:48:35,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:48:35,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-16 05:48:35,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:35,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-16 05:48:35,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2021-12-16 05:48:35,367 INFO L87 Difference]: Start difference. First operand 272 states and 301 transitions. Second operand has 29 states, 28 states have (on average 4.964285714285714) internal successors, (139), 29 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:35,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:35,680 INFO L93 Difference]: Finished difference Result 328 states and 361 transitions. [2021-12-16 05:48:35,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-16 05:48:35,681 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 4.964285714285714) internal successors, (139), 29 states have internal predecessors, (139), 0 states have call successors, (0), 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 [2021-12-16 05:48:35,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:35,682 INFO L225 Difference]: With dead ends: 328 [2021-12-16 05:48:35,682 INFO L226 Difference]: Without dead ends: 328 [2021-12-16 05:48:35,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=362, Invalid=1198, Unknown=0, NotChecked=0, Total=1560 [2021-12-16 05:48:35,683 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 132 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:35,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 500 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:48:35,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-12-16 05:48:35,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 317. [2021-12-16 05:48:35,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 315 states have (on average 1.1206349206349207) internal successors, (353), 316 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:35,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 353 transitions. [2021-12-16 05:48:35,687 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 353 transitions. Word has length 57 [2021-12-16 05:48:35,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:35,687 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 353 transitions. [2021-12-16 05:48:35,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 4.964285714285714) internal successors, (139), 29 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:35,687 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 353 transitions. [2021-12-16 05:48:35,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-16 05:48:35,688 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:35,688 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:48:35,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-16 05:48:35,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:35,895 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:35,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:35,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1450362154, now seen corresponding path program 2 times [2021-12-16 05:48:35,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:35,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909198489] [2021-12-16 05:48:35,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:35,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:35,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:36,071 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 14 proven. 25 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-16 05:48:36,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:36,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909198489] [2021-12-16 05:48:36,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909198489] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:48:36,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836946031] [2021-12-16 05:48:36,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 05:48:36,072 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:36,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:48:36,073 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) [2021-12-16 05:48:36,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-16 05:48:36,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 05:48:36,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:48:36,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-16 05:48:36,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:48:36,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-16 05:48:36,839 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:48:36,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-12-16 05:48:36,965 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-16 05:48:36,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:48:37,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-16 05:48:37,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 05:48:37,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-16 05:48:37,541 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-16 05:48:37,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836946031] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:48:37,541 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:48:37,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 40 [2021-12-16 05:48:37,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523797896] [2021-12-16 05:48:37,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:48:37,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-16 05:48:37,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:37,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-16 05:48:37,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1439, Unknown=0, NotChecked=0, Total=1560 [2021-12-16 05:48:37,543 INFO L87 Difference]: Start difference. First operand 317 states and 353 transitions. Second operand has 40 states, 40 states have (on average 2.875) internal successors, (115), 40 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:38,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:38,934 INFO L93 Difference]: Finished difference Result 439 states and 474 transitions. [2021-12-16 05:48:38,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-16 05:48:38,934 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.875) internal successors, (115), 40 states have internal predecessors, (115), 0 states have call successors, (0), 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 60 [2021-12-16 05:48:38,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:38,935 INFO L225 Difference]: With dead ends: 439 [2021-12-16 05:48:38,935 INFO L226 Difference]: Without dead ends: 397 [2021-12-16 05:48:38,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 106 SyntacticMatches, 5 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1219 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=625, Invalid=5381, Unknown=0, NotChecked=0, Total=6006 [2021-12-16 05:48:38,937 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 114 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 266 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:38,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 647 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 303 Invalid, 0 Unknown, 266 Unchecked, 0.1s Time] [2021-12-16 05:48:38,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-12-16 05:48:38,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 298. [2021-12-16 05:48:38,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 296 states have (on average 1.1081081081081081) internal successors, (328), 297 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:38,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 328 transitions. [2021-12-16 05:48:38,941 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 328 transitions. Word has length 60 [2021-12-16 05:48:38,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:38,941 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 328 transitions. [2021-12-16 05:48:38,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.875) internal successors, (115), 40 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:38,942 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 328 transitions. [2021-12-16 05:48:38,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-16 05:48:38,942 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:38,942 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:48:38,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-16 05:48:39,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-12-16 05:48:39,155 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:39,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:39,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1199547427, now seen corresponding path program 7 times [2021-12-16 05:48:39,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:39,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304139819] [2021-12-16 05:48:39,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:39,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:39,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:39,379 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 20 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:39,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:39,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304139819] [2021-12-16 05:48:39,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304139819] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:48:39,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967389705] [2021-12-16 05:48:39,379 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 05:48:39,380 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:39,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:48:39,380 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:48:39,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-16 05:48:39,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:39,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 76 conjunts are in the unsatisfiable core [2021-12-16 05:48:39,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:48:39,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-16 05:48:39,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:48:39,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2021-12-16 05:48:40,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:48:40,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 05:48:40,413 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-16 05:48:40,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 21 [2021-12-16 05:48:40,423 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 20 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:40,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:48:40,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-12-16 05:48:40,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 05:48:40,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 39 [2021-12-16 05:48:41,026 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 24 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:41,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967389705] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:48:41,026 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:48:41,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22, 20] total 48 [2021-12-16 05:48:41,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647438114] [2021-12-16 05:48:41,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:48:41,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-16 05:48:41,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:41,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-16 05:48:41,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=2085, Unknown=0, NotChecked=0, Total=2256 [2021-12-16 05:48:41,028 INFO L87 Difference]: Start difference. First operand 298 states and 328 transitions. Second operand has 48 states, 48 states have (on average 3.125) internal successors, (150), 48 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:41,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:41,839 INFO L93 Difference]: Finished difference Result 510 states and 554 transitions. [2021-12-16 05:48:41,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-16 05:48:41,843 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.125) internal successors, (150), 48 states have internal predecessors, (150), 0 states have call successors, (0), 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 65 [2021-12-16 05:48:41,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:41,844 INFO L225 Difference]: With dead ends: 510 [2021-12-16 05:48:41,844 INFO L226 Difference]: Without dead ends: 394 [2021-12-16 05:48:41,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=367, Invalid=4189, Unknown=0, NotChecked=0, Total=4556 [2021-12-16 05:48:41,845 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 178 mSDsluCounter, 1087 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 1125 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:41,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 1125 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 710 Invalid, 0 Unknown, 121 Unchecked, 0.2s Time] [2021-12-16 05:48:41,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-12-16 05:48:41,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 362. [2021-12-16 05:48:41,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 360 states have (on average 1.1055555555555556) internal successors, (398), 361 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:41,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 398 transitions. [2021-12-16 05:48:41,850 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 398 transitions. Word has length 65 [2021-12-16 05:48:41,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:41,850 INFO L470 AbstractCegarLoop]: Abstraction has 362 states and 398 transitions. [2021-12-16 05:48:41,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.125) internal successors, (150), 48 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:41,850 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 398 transitions. [2021-12-16 05:48:41,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-16 05:48:41,851 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:41,851 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:48:41,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-16 05:48:42,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:42,067 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:42,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:42,068 INFO L85 PathProgramCache]: Analyzing trace with hash -512930976, now seen corresponding path program 8 times [2021-12-16 05:48:42,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:42,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668384418] [2021-12-16 05:48:42,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:42,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:42,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:42,226 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 18 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:42,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:42,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668384418] [2021-12-16 05:48:42,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668384418] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:48:42,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135309316] [2021-12-16 05:48:42,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 05:48:42,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:42,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:48:42,228 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:48:42,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-16 05:48:42,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 05:48:42,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:48:42,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-16 05:48:42,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:48:42,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:48:42,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-16 05:48:42,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-16 05:48:42,807 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 28 proven. 73 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:42,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:48:43,321 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 45 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:43,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135309316] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:48:43,322 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:48:43,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2021-12-16 05:48:43,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171603289] [2021-12-16 05:48:43,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:48:43,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-16 05:48:43,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:43,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-16 05:48:43,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1456, Unknown=0, NotChecked=0, Total=1640 [2021-12-16 05:48:43,323 INFO L87 Difference]: Start difference. First operand 362 states and 398 transitions. Second operand has 41 states, 40 states have (on average 4.975) internal successors, (199), 41 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:44,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:44,060 INFO L93 Difference]: Finished difference Result 436 states and 473 transitions. [2021-12-16 05:48:44,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-16 05:48:44,060 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 4.975) internal successors, (199), 41 states have internal predecessors, (199), 0 states have call successors, (0), 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 69 [2021-12-16 05:48:44,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:44,061 INFO L225 Difference]: With dead ends: 436 [2021-12-16 05:48:44,062 INFO L226 Difference]: Without dead ends: 436 [2021-12-16 05:48:44,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=677, Invalid=2983, Unknown=0, NotChecked=0, Total=3660 [2021-12-16 05:48:44,062 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 387 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 829 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:44,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [387 Valid, 829 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 746 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 05:48:44,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-12-16 05:48:44,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 404. [2021-12-16 05:48:44,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 402 states have (on average 1.1069651741293531) internal successors, (445), 403 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:44,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 445 transitions. [2021-12-16 05:48:44,067 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 445 transitions. Word has length 69 [2021-12-16 05:48:44,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:44,068 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 445 transitions. [2021-12-16 05:48:44,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 4.975) internal successors, (199), 41 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:44,068 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 445 transitions. [2021-12-16 05:48:44,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-16 05:48:44,069 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:44,069 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:48:44,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-16 05:48:44,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:44,275 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:44,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:44,276 INFO L85 PathProgramCache]: Analyzing trace with hash 2096231571, now seen corresponding path program 3 times [2021-12-16 05:48:44,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:44,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738167681] [2021-12-16 05:48:44,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:44,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:44,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:44,656 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 16 proven. 83 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-16 05:48:44,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:44,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738167681] [2021-12-16 05:48:44,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738167681] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:48:44,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174459224] [2021-12-16 05:48:44,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 05:48:44,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:44,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:48:44,657 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:48:44,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-16 05:48:44,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-16 05:48:44,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:48:44,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 71 conjunts are in the unsatisfiable core [2021-12-16 05:48:44,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:48:45,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-16 05:48:45,117 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 20 proven. 66 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-16 05:48:45,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:48:45,237 INFO L354 Elim1Store]: treesize reduction 4, result has 69.2 percent of original size [2021-12-16 05:48:45,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2021-12-16 05:48:45,376 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 20 proven. 66 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-16 05:48:45,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174459224] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:48:45,377 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:48:45,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 15] total 40 [2021-12-16 05:48:45,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299513170] [2021-12-16 05:48:45,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:48:45,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-16 05:48:45,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:45,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-16 05:48:45,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1432, Unknown=0, NotChecked=0, Total=1560 [2021-12-16 05:48:45,378 INFO L87 Difference]: Start difference. First operand 404 states and 445 transitions. Second operand has 40 states, 40 states have (on average 3.675) internal successors, (147), 40 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:47,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:47,424 INFO L93 Difference]: Finished difference Result 939 states and 1018 transitions. [2021-12-16 05:48:47,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-16 05:48:47,425 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.675) internal successors, (147), 40 states have internal predecessors, (147), 0 states have call successors, (0), 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 [2021-12-16 05:48:47,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:47,426 INFO L225 Difference]: With dead ends: 939 [2021-12-16 05:48:47,426 INFO L226 Difference]: Without dead ends: 817 [2021-12-16 05:48:47,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 137 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1380 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1051, Invalid=5755, Unknown=0, NotChecked=0, Total=6806 [2021-12-16 05:48:47,427 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 499 mSDsluCounter, 919 mSDsCounter, 0 mSdLazyCounter, 1386 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 499 SdHoareTripleChecker+Valid, 968 SdHoareTripleChecker+Invalid, 1509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:47,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [499 Valid, 968 Invalid, 1509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1386 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-16 05:48:47,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2021-12-16 05:48:47,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 536. [2021-12-16 05:48:47,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 534 states have (on average 1.1123595505617978) internal successors, (594), 535 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:47,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 594 transitions. [2021-12-16 05:48:47,435 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 594 transitions. Word has length 74 [2021-12-16 05:48:47,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:47,435 INFO L470 AbstractCegarLoop]: Abstraction has 536 states and 594 transitions. [2021-12-16 05:48:47,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.675) internal successors, (147), 40 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:47,435 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 594 transitions. [2021-12-16 05:48:47,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-16 05:48:47,436 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:47,436 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:48:47,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-16 05:48:47,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:47,645 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:47,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:47,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1706384470, now seen corresponding path program 9 times [2021-12-16 05:48:47,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:47,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270694250] [2021-12-16 05:48:47,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:47,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:47,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:47,935 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 26 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:47,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:47,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270694250] [2021-12-16 05:48:47,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270694250] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:48:47,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248724380] [2021-12-16 05:48:47,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 05:48:47,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:47,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:48:47,939 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:48:47,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-16 05:48:48,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-16 05:48:48,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:48:48,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-16 05:48:48,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:48:48,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-16 05:48:48,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-16 05:48:48,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-16 05:48:48,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-16 05:48:52,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 05:48:52,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2021-12-16 05:48:52,258 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 77 proven. 57 refuted. 1 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:52,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:48:52,773 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:48:52,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2021-12-16 05:48:52,778 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:48:52,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2021-12-16 05:48:52,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-16 05:48:53,498 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 78 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:53,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248724380] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:48:53,498 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:48:53,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 50 [2021-12-16 05:48:53,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530227937] [2021-12-16 05:48:53,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:48:53,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-16 05:48:53,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:53,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-16 05:48:53,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=2241, Unknown=2, NotChecked=0, Total=2450 [2021-12-16 05:48:53,499 INFO L87 Difference]: Start difference. First operand 536 states and 594 transitions. Second operand has 50 states, 50 states have (on average 4.14) internal successors, (207), 50 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:56,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:56,640 INFO L93 Difference]: Finished difference Result 871 states and 963 transitions. [2021-12-16 05:48:56,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-16 05:48:56,641 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.14) internal successors, (207), 50 states have internal predecessors, (207), 0 states have call successors, (0), 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 77 [2021-12-16 05:48:56,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:56,643 INFO L225 Difference]: With dead ends: 871 [2021-12-16 05:48:56,643 INFO L226 Difference]: Without dead ends: 684 [2021-12-16 05:48:56,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=571, Invalid=5278, Unknown=3, NotChecked=0, Total=5852 [2021-12-16 05:48:56,644 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 227 mSDsluCounter, 1231 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 1283 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 190 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:56,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 1283 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 474 Invalid, 0 Unknown, 190 Unchecked, 0.2s Time] [2021-12-16 05:48:56,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2021-12-16 05:48:56,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 611. [2021-12-16 05:48:56,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 611 states, 609 states have (on average 1.1083743842364533) internal successors, (675), 610 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:56,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 675 transitions. [2021-12-16 05:48:56,652 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 675 transitions. Word has length 77 [2021-12-16 05:48:56,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:56,652 INFO L470 AbstractCegarLoop]: Abstraction has 611 states and 675 transitions. [2021-12-16 05:48:56,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.14) internal successors, (207), 50 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:56,652 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 675 transitions. [2021-12-16 05:48:56,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-16 05:48:56,653 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:56,653 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:48:56,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-12-16 05:48:56,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:56,870 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:56,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:56,870 INFO L85 PathProgramCache]: Analyzing trace with hash 559244973, now seen corresponding path program 10 times [2021-12-16 05:48:56,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:56,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906702602] [2021-12-16 05:48:56,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:56,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:56,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:57,062 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 32 proven. 124 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:57,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:57,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906702602] [2021-12-16 05:48:57,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906702602] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:48:57,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959325212] [2021-12-16 05:48:57,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 05:48:57,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:57,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:48:57,064 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:48:57,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-16 05:48:57,174 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 05:48:57,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:48:57,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-16 05:48:57,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:48:57,475 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 50 proven. 106 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:57,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:48:57,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-16 05:48:57,838 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 50 proven. 106 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:57,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959325212] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:48:57,838 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:48:57,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2021-12-16 05:48:57,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081115161] [2021-12-16 05:48:57,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:48:57,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-16 05:48:57,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:57,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-16 05:48:57,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1038, Unknown=0, NotChecked=0, Total=1190 [2021-12-16 05:48:57,839 INFO L87 Difference]: Start difference. First operand 611 states and 675 transitions. Second operand has 35 states, 34 states have (on average 5.088235294117647) internal successors, (173), 35 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:58,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:58,561 INFO L93 Difference]: Finished difference Result 755 states and 825 transitions. [2021-12-16 05:48:58,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-16 05:48:58,562 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 5.088235294117647) internal successors, (173), 35 states have internal predecessors, (173), 0 states have call successors, (0), 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 [2021-12-16 05:48:58,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:58,563 INFO L225 Difference]: With dead ends: 755 [2021-12-16 05:48:58,563 INFO L226 Difference]: Without dead ends: 755 [2021-12-16 05:48:58,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=521, Invalid=2131, Unknown=0, NotChecked=0, Total=2652 [2021-12-16 05:48:58,564 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 252 mSDsluCounter, 1318 mSDsCounter, 0 mSdLazyCounter, 1196 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 1394 SdHoareTripleChecker+Invalid, 1219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:58,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 1394 Invalid, 1219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1196 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-16 05:48:58,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2021-12-16 05:48:58,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 673. [2021-12-16 05:48:58,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 671 states have (on average 1.1102831594634874) internal successors, (745), 672 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:58,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 745 transitions. [2021-12-16 05:48:58,571 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 745 transitions. Word has length 81 [2021-12-16 05:48:58,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:58,572 INFO L470 AbstractCegarLoop]: Abstraction has 673 states and 745 transitions. [2021-12-16 05:48:58,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 5.088235294117647) internal successors, (173), 35 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:58,572 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 745 transitions. [2021-12-16 05:48:58,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-16 05:48:58,573 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:58,573 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:48:58,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-12-16 05:48:58,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-12-16 05:48:58,787 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:58,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:58,788 INFO L85 PathProgramCache]: Analyzing trace with hash -170902987, now seen corresponding path program 4 times [2021-12-16 05:48:58,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:58,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729719834] [2021-12-16 05:48:58,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:58,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:58,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:58,966 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 6 proven. 108 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-12-16 05:48:58,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:58,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729719834] [2021-12-16 05:48:58,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729719834] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:48:58,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921556505] [2021-12-16 05:48:58,967 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 05:48:58,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:58,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:48:58,968 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:48:58,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-16 05:48:59,064 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 05:48:59,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:48:59,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-16 05:48:59,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:48:59,301 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 18 proven. 96 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-12-16 05:48:59,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:48:59,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-16 05:48:59,616 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 18 proven. 96 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-12-16 05:48:59,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921556505] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:48:59,616 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:48:59,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 31 [2021-12-16 05:48:59,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944715745] [2021-12-16 05:48:59,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:48:59,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-16 05:48:59,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:59,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-16 05:48:59,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=876, Unknown=0, NotChecked=0, Total=992 [2021-12-16 05:48:59,617 INFO L87 Difference]: Start difference. First operand 673 states and 745 transitions. Second operand has 32 states, 31 states have (on average 4.32258064516129) internal successors, (134), 32 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:49:00,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:49:00,136 INFO L93 Difference]: Finished difference Result 1137 states and 1242 transitions. [2021-12-16 05:49:00,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-16 05:49:00,136 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 4.32258064516129) internal successors, (134), 32 states have internal predecessors, (134), 0 states have call successors, (0), 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 83 [2021-12-16 05:49:00,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:49:00,138 INFO L225 Difference]: With dead ends: 1137 [2021-12-16 05:49:00,138 INFO L226 Difference]: Without dead ends: 1137 [2021-12-16 05:49:00,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=406, Invalid=1664, Unknown=0, NotChecked=0, Total=2070 [2021-12-16 05:49:00,139 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 272 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 05:49:00,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 561 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 05:49:00,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2021-12-16 05:49:00,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 699. [2021-12-16 05:49:00,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 697 states have (on average 1.1061692969870875) internal successors, (771), 698 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:49:00,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 771 transitions. [2021-12-16 05:49:00,149 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 771 transitions. Word has length 83 [2021-12-16 05:49:00,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:49:00,149 INFO L470 AbstractCegarLoop]: Abstraction has 699 states and 771 transitions. [2021-12-16 05:49:00,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 4.32258064516129) internal successors, (134), 32 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:49:00,150 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 771 transitions. [2021-12-16 05:49:00,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-16 05:49:00,150 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:49:00,151 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:49:00,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-12-16 05:49:00,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-12-16 05:49:00,368 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:49:00,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:49:00,368 INFO L85 PathProgramCache]: Analyzing trace with hash -2134117084, now seen corresponding path program 5 times [2021-12-16 05:49:00,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:49:00,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514078315] [2021-12-16 05:49:00,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:49:00,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:49:00,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:49:01,004 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 22 proven. 143 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-16 05:49:01,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:49:01,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514078315] [2021-12-16 05:49:01,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514078315] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:49:01,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527419914] [2021-12-16 05:49:01,004 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 05:49:01,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:49:01,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:49:01,005 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:49:01,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-16 05:49:01,124 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-16 05:49:01,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:49:01,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 88 conjunts are in the unsatisfiable core [2021-12-16 05:49:01,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:49:01,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 05:49:01,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-16 05:49:01,515 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 26 proven. 127 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-16 05:49:01,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:49:01,902 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 26 proven. 127 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-16 05:49:01,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527419914] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:49:01,902 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:49:01,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 18, 17] total 43 [2021-12-16 05:49:01,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935395740] [2021-12-16 05:49:01,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:49:01,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-16 05:49:01,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:49:01,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-16 05:49:01,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1672, Unknown=0, NotChecked=0, Total=1806 [2021-12-16 05:49:01,904 INFO L87 Difference]: Start difference. First operand 699 states and 771 transitions. Second operand has 43 states, 43 states have (on average 3.511627906976744) internal successors, (151), 43 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)